Alberts, Hugo W. 1926. A Method For Calculating Linkage Values Genetics, 11: 235-248.
PDF image facsimile file

Altenburg, Edgar and Muller, Hermann J. 1920. The Genetic Basis of Truncate Wing,—an Inconstant and Modifiable Character in Drosophila Genetics, 5: 248.
PDF image facsimile file

Altenburg, Edgar and Muller, Hermann J. 1920. The Genetic Basis of Truncate Wing,—an Inconstant and Modifiable Character in Drosophila Genetics, 5: 1-59.
PDF image facsimile file

Anonymous. 1844. Vestiges of the Natural History of Creation. London: John Churchill.
This is a full-text PDF image facsimile version of the entire 390-page original first edition.

Aristotle. 350 BC. On the Generation of Animals.
This is a full-text HTML version of the entire book.

Aristotle. 350 BC. On the Parts of Animals.
This is a full-text HTML version of the entire book.

Aristotle. 350 BC. The History of Animals.
This is a full-text HTML version of the entire book.

Bateson, William, Saunders, E. R., and Punnett, R. C. 1904. Experimental Studies in the Physiology of Heredity. Reports to the Evolution Committee of the Royal Society, II, 1904, pp. 1-131
PDF image facsimile file: 6,907,359 bytes - 154 pages - no figures

Bateson, William, and Saunders, E. R. 1902. The facts of heredity in the light of Mendel's discovery. Reports to the Evolution Committee of the Royal Society, I, 1902, pp. 125-160
PDF typeset file: 543,744 bytes - 41 pages - no figures

Bateson, William. 1894. Materials for the Study of Variation. London: Macmillan and Company.
This is a full-text PDF image facsimile version of the entire 598-page original first edition.

Bateson, William. 1899. Hybridisation and cross-breeding as a method of scientific investigation. Journal of the Royal Horticultural Society, 24:59-66.
PDF typeset file: 89,523 bytes - 13 pages - no figures

Bateson, William. 1900. Problems of heredity as a subject for horticultural investigation. Journal of the Royal Horticultural Society, 25:54-61.
PDF typeset file: 84,218 bytes - 12 pages - no figures

Bateson, William. 1902. Application for Support of an Experimental Investigation of Mendel's Principles of Heredity in Animals and Plants. In Bateson, B. 1928. William Bateson, F.R.S.: His Essays & Addresses, together with a Short Account of his Life. Cambridge: Cambridge University Press.
PDF typeset file: 36,348 bytes - 6 pages - no figures

Bateson, William. 1902. Mendel's Principles of Heredity: A Defence. London: Cambridge University Press.
This is a full-text PDF image facsimile version of the entire 212-page original first edition.

Bateson, William. 1908. The Methods and Scope of Genetics. London: Cambridge University Press.
This is a newly typeset full-text version of the entire 49-page original first edition.

Beadle, G. W. 1935. Crossing Over Near the Spindle Attachment of the X Chromosomes in Attached-x Triploids of Drosophila Melanogaster Genetics, 20:179-191.
PDF image facsimile file

Beadle, G. W. 1937. Development of Eye Colors in Drosophila: Fat Bodies and Malpighian Tubes in Relation to Diffusible Substances Genetics, 22: 587-611.
PDF image facsimile file

Beadle, G. W. and Emerson, Sterling 1935. Further Studies of Crossing Over in Attached-x Chromosomes of Drosophila Melanogaster Genetics, 20: 192-206.
PDF image facsimile file

Beadle, G. W. and Ephrussi, Boris 1936. The Differentiation of Eye Pigments in Drosophila As Studied by Transplantation Genetics, 21: 225-247.
PDF image facsimile file

Beadle, G. W. and Ephrussi, Boris 1937. Development of Eye Colors in Drosophila: Diffusible Substances and Their Interrelations Genetics, 22: 76-86.
PDF image facsimile file

Belling, John 1933. Crossing Over and Gene Rearrangement in Flowering Plants Genetics, 18: 388-413.
PDF image facsimile file

Bridges, C. B. and Bridges, P. N. 1938. Salivary Analysis of Inversion-3r-payne in the "venation" Stock of Drosophila melanogaster Genetics, 23: 111-114.
PDF image facsimile file

Bridges, Calvin B. 1914. Direct proof through non-disjunction that the sex-linked genes of Drosophila are borne on the X-chromosome. Science, NS vol. XL:107-109.
PDF typeset file: 24,076 bytes - 5 pages - no figures

Bridges, Calvin B. 1916. Non-disjunction as proof of the chromosome theory of heredity (part 1). Genetics, B, 1:1-52.
PDF image facsimile file: 1.808,605 bytes - 52 pages - many figures

Bridges, Calvin B. 1916. Non-disjunction as proof of the chromosome theory of heredity (part 2). Genetics, B, 1:107-163.
PDF image facsimile file: 2,600,250 bytes - 59 pages - many figures

Bridges, Calvin B. 1917. Deficiency. Genetics, 2:445-465.
PDF image facsimile file: 21 pages

Bridges, Calvin B. and Mohr, Otto L. 1919. The Inheritance of the Mutant Character "vortex" Genetics, 4: 283-306.
PDF image facsimile file

Bridges, Calvin B., Skoog, Eleanor Nichols, and Li, Ju-chi. 1936. Genetical and cytological studies of a deficiency (notopleural) in the second chromosome of Drosophila melanogaster. Genetics, 21:788-795.
PDF image facsimile file: 8 pages

Bridges, Calvin B., and Anderson, E. G. 1925. Crossing over in the X chromosomes of triploid females of Drosophila melanogaster.. Genetics, 10:418-441.
PDF image facsimile file: 24 pages

Bridges, Calvin B., and Mohr, Otto L. 1919. The inheritance of the mutant character "vortex". Genetics, 4:283-306.
PDF image facsimile file: 24 pages

Bridges, Calvin B., and Olbrycht, T. M. 1926. The Multiple Stock "xple" and its use. Genetics, 11:41-55.
PDF image facsimile file: 16 pages

Bridges, Calvin. 1921. Triploid intersexes in Drosophila melanogaster. Science, 54:252-254.
PDF typeset file: 153,521 bytes - 5 pages - no figures

Brink, R. A. and Cooper, D. C. 1935. A Proof That Crossing Over Involves an Exchange of Segments Between Homologous Chromosomes Genetics, 20: 22-35.
PDF image facsimile file

Brooks, W. K. 1883. The Law of Heredity, Second Edition. Baltimore and New York: John Murphy & Co., Publishers.
This is a full-text PDF image facsimile version of the entire 336-page original first edition.

Cannon, W. A. 1902. A cytological basis for the Mendelian laws. Bulletin of the Torrey Botanical Club, 29:657-661.
PDF typeset file: 191,965 bytes - 6 pages

Castle, W. E. 1938. The Relation of Albinism to Body Size in Mice Genetics, 23: 269-274.
PDF image facsimile file

Castle, W. E. and Reed, S. C. 1936. Studies of Inheritance in Lop-eared Rabbits Genetics, 21: 297-309.
PDF image facsimile file

Castle, W. E. 1911. Heredity in Relation to Evolution and Animal Breeding. New York: D. Appleton and Company
This is an image facsimile version of the entire 184-page original edition.

Castle, W. E. 1913. Simplification of Mendelian formulae. The American Naturalist, 47:170-182
PDF typeset file: 69,294 bytes - 13 pages - no figures

Castle, W. E. 1923. The relation of Mendelism to mutation and evolution. The American Naturalist, 57:559-561
PDF typeset file: 30,865 bytes - 5 pages - no figures

Castle, W. E. 1925. A Sex Difference in Linkage in Rats and Mice Genetics, 10: 580-582.
PDF image facsimile file

Castle, W. E., Gates, W. H., Reed, S. C. and Law, L. W. 1936. Studies of a Size Cross in Mice, II Genetics, 21: 310-323.
PDF image facsimile file

Castle, W. E., Gates, W. H., and Reed, S. C. 1936. Studies of a Size Cross in Mice Genetics, 21: 66-78.
PDF image facsimile file

Castle, W. E., and Little, C. C. 1910. On a modified Mendelian ratio among yellow mice. Science, N.S., 32:868-870.
PDF typeset file: 39,133 bytes - 7 pages - no figures

Castle, W. E., and Wachter, W. L. 1924. Variations of Linkage in Rats and Mice Genetics, 9: 1-12.
PDF image facsimile file

Castle, W.E. 1919. Is the arrangement of the genes in the chromosome linear? Proceedings of the National Academy of Sciences, 5:25-32.
PDF image facsimile file: 615,957 bytes - 8 pages

Charles W. Metz, Charles W. 1918. The Linkage of Eight Sex-linked Characters in drosophila Virilis Genetics, 3: 107-134.
PDF image facsimile file

Cook, Robert. 1937. A chronology of genetics. Yearbook of Agriculture, pp. 1457-1477.
PDF typeset file: 251,867 bytes - 28 pages - one figure

Correns, Carl 1900. G. Mendel's law concerning the behavior of progeny of varietal hybrids. First published in English as: Correns, C., 1950. G. Mendel's law concerning the behavior of progeny of varietal hybrids. Genetics, 35(5, pt 2): 33-41. Originally published as: Correns, C. 1900. G. Mendels Regel über das Verhalten der Nachkommenschaft der Rassenbastarde. Berichte der Deutschen Botanischen Gesellschaft, 18: 158-168.
PDF typeset file: 78,900 bytes - 14 pages - no figures

Creighton, Harriet B., and McClintock, Barbara. 1931. A correlation of cytological and genetical crossing-over in Zea mays. PNAS, 17:492-497.
PDF typeset file: 140,176 bytes - 17 pages - several figures

Creighton, Harriet B., and McClintock, Barbara. 1931. A correlation of cytological and genetical crossing-over in Zea mays. PNAS, 17:492-497.
PDF image facsimile file: 6 pages - several figures

Crew, F. A. E. 1969. Recollections of the early days of the genetical society. In John Jinks, The Genetical Society - The First Fifty Years, Edinburgh: Oliver and Boyd, pp.9-15.
PDF image facsimile file: 7 pages

Darbishire, A. D. 1905. On the supposed antagonism of Mendelian to biometric theories of heredity. Manchester Memoirs, 49:1-19.
PDF typeset file: 16 pages

Darwin, C. 1845. The Voyage of the Beagle, Second Edition. London: John Murray.
This is a full-text HTML version of the entire book.

Darwin, C. 1859. On the Origin of Species. London: John Murray, Albemarle Street.
This is a full-text PDF image facsimile version of the entire 502-page original first edition.

Darwin, C. 1883. The Variation of Animals and Plants Under Domestication, Second Edition, Revised (two volumes). New York: D. Appleton & Co.
This is a full-text PDF image facsimile version of the entire 473-page volume I and the entire 495-page volume II of the original work.

Davenport, C. B. 1930. Sex linkage in man Genetics, 15: 401-444.
PDF image facsimile file

Davenport, Charles B. 1917. Inheritance of Stature Genetics, 2: 313-389.
PDF image facsimile file

David H. Thompson 1931. The side-chain theory of the structure of the Gene Genetics, 16: 267-290.
PDF image facsimile file

Demerec, M. 1923. Inheritance of White Seedlings in Maize Genetics, 8: 561-593.
PDF image facsimile file

Demerec, M. 1937. Frequency of Spontaneous Mutations in Certain Stocks of Drosophila melanogaster Genetics, 22: 469-478.
PDF image facsimile file

Demerec, Milislav 1933. What is a Gene? Journal of Heredity, 24:368-378.
PDF typeset file: 679,936 bytes - 22 pages - several figures

Dobzhansky, T. 1930. Translocations involving the third and the fourth chromosomes of Drosophila melanogaster Genetics, 15: 347-399.
PDF image facsimile file

Dobzhansky, Th. 1937. Further Data on the Variation of the Y Chromosome in Drosophila Pseudoobscura Genetics, 22: 340-346.
PDF image facsimile file

Dobzhansky, Th. and Beadle, G. W. 1936. Studies on Hybrid Sterility IV. Transplanted Testes in Drosophila Pseudoobscura Genetics, 21: 832-840.
PDF image facsimile file

Dobzhansky, Th. and Queal, M. L. 1938. Genetics of Natural Populations. I. Chromosome Variation in Populations of Drosophila Pseudoobscura Inhabiting Isolated Mountain Ranges Genetics, 23: 239-251.
PDF image facsimile file

Dobzhansky, Th. and Sturtevant, A. H. 1938. Inversions in the Chromosomes of Drosophila Pseudoobscura Genetics, 23: 28-64.
PDF image facsimile file

Dobzhansky, Th. 1935. Drosophila Miranda, a New Species Genetics, 20: 377-391.
PDF image facsimile file

Dobzhansky, Th. 1935. The Y Chromosome of Drosophila Pseudoobscura Genetics, 20: 366-376.
PDF image facsimile file

Dobzhansky, Th. 1936. Studies on Hybrid Sterility. II. Localization of Sterility Factors in Drosophila Pseudoobscura Hybrids Genetics, 21: 113-135.
PDF image facsimile file

Dobzhansky, t. 1931. Translocations Involving the Second and the fourth chromosomes of Drosophila melanogaster Genetics, 16: 629-658.
PDF image facsimile file

Doncaster, L. 1911. Heredity in the Light of Recent Research. Cambridge: University Press
This is an image facsimile version of the entire 144-page original first edition.

Drinkwater, H. 1910. A Lecture on Mendelism. London: J. M. Dent & Sons.
This is an image facsimile version of the entire 48-page original first edition.

Dunn, L. C. 1920. Independent Genes in Mice Genetics, 5: 344-361.
PDF image facsimile file

Dunn, L. C. 1920. Linkage in Mice and Rats Genetics, 5: 325-343.
PDF image facsimile file

East - Morgan - Harris - Shull 1923. The Centenary of Gregor Mendel and of Francis Galton. The Scientific Monthly, 16: 225-270.
PDF typeset file: 247,951 bytes - 54 pages - no figures

East, E. M. 1916. Studies on Size Inheritance in Nicotiana Genetics, 1:164-176.
PDF image facsimile file

East, E. M. 1923. Mendel and his contemporaries. The Scientific Monthly, 16: 225-237.
PDF typeset file: 247,951 bytes - 54 pages - no figures

East, E. M. 1929. The concept of the gene. Proceedings of the International Congress of Plant Sciences, Ithaca, New York, August 16-23, 1926, vol. 1. Menasha, WI: George Banta Publishing Co. pp 889-895.
PDF typeset file: 76,104 bytes - 11 pages - no figures

East, E. M. 1936. Heterosis Genetics, 21: 375-397.
PDF image facsimile file

Ephrussi, Boris and Beadle, G. W. 1937. Development of Eye Colors in Drosophila: Production and Release of cn+ Substance by the Eyes of Different Eye Color Mutants Genetics, 22: 479-483.
PDF image facsimile file

Ephrussi, Boris and Beadle, G. W. 1937. Development of Eye Colors in Drosophila: Transplantation Experiments on the Interaction of Vermilion with Other Eye Colors Genetics, 22: 65-75.
PDF image facsimile file

Fisher, R. A. , Immer, F. R., and Tedin, Olof 1932. The Genetical Interpretation of Statistics of the Third Degree in the Study of Quantitative Inheritance Genetics, 17: 107-124.
PDF image facsimile file

Fisher, R. A. 1919. The Genesis of Twins Genetics, 4: 489-499.
PDF image facsimile file

Galen. 170 AD. On the Natural Faculties.
This is a full-text HTML version of the entire book.

Galton, Francis 1889. Natural Inheritance. London: Macmillan
This is an image facsimile version of the entire 260-page original first edition.

Galton, Francis. 1898. A Diagram of Heredity. Nature, 57:293.
PDF typeset file: 27,776 bytes - 5 pages - one figure

Garrod, Archibald E. 1902. The incidence of alkaptonuria: A study in chemical individuality. Lancet, ii:1616-1620.
PDF typeset file: 145,052 bytes - 18 pages - no figures

Garrod, Archibald. 1923. Inborn Errors of Metabolism, Second Edition. London: Henry Frowde and Hodder & Stoughton
This is a full-text PDF image facsimile version of the entire 216-page original book.

Goldschmidt, Richard 1917. Crossing Over ohne Chiasmatypie? Genetics, 2:82-95.
PDF image facsimile file: 764,480 bytes - 14 pages - 2 figures

Haldane, J. B. S. 1934. A Mathematical Theory of Natural and Artificial Selection Part X. Some Theorems on Artificial Selection Genetics, 19: 412-429.
PDF image facsimile file

Haldane, J. B. S. and Waddington, C. H. 1931. Inbreeding and Linkage Genetics, 16: 357-374.
PDF image facsimile file

Hardy, G. H. 1908. Mendelian Proportions in a Mixed Population. Science, NS. XXVIII:49-50.
PDF typeset file: 19,473 bytes - 1 page - no figures

Harnly, Morris Henry and Ephrussi, Boris 1937. Development of Eye Colors in Drosophila: Time of Action of Body Fluid on Cinnabar Genetics, 22: 393-401.
PDF image facsimile file

Harris, J. Arthur 1923. Galton and Mendel: Their contribution to genetics and their influence on biology. The Scientific Monthly, 16: 247-263.
PDF typeset file: 247,951 bytes - 54 pages - no figures

Hurst, C. C. 1904. Experiments with Poultry. Reports to the Evolution Committee of the Royal Society, II, 1904, pp. 131-154
PDF image facsimile file: 6,907,359 bytes - 154 pages - no figures

Huxley, T. H. 1869. Nature: Aphorisms by Goethe. Nature, 1:9-11.
PDF image facsimile file: 343,040 bytes bytes - 3 pages

Ibsen, Heman L. 1916. Tricolor Inheritance. II. the Basset Hound Genetics, 1: 367-376.
PDF image facsimile file

Ibsen, Heman L. 1916. Tricolor Inheritance. III. Tortoiseshell Cats Genetics, 1: 377-386.
PDF image facsimile file

Ibsen, Heman L. 1916. Tricolor Inheritance. I. the Tricolor Series in Guinea-pigs Genetics, 1: 287-309.
PDF image facsimile file

Ibsen, Heman L. 1919. Tricolor Inheritance. Iv. the Triple Allelo-morphic Series in Guinea-pigs Genetics, 4: 597-606.
PDF image facsimile file

Jennings, H. S. 1923. The Numerical Relations in the Crossing Over of the Genes, with a Critical Examination of the Theory That the Genes Are Arranged in a Linear Series Genetics, 8: 393-457.
PDF image facsimile file

Jones, Donald F. (ed) 1932. Proceedings of the Sixth International Congress of Genetics, Vol. I. Austin, Texas: Genetics Society of America
This is an image facsimile version of the entire 396-page original edition.

Little, C. C. 1914. A possible Mendelian explanation for a type of inheritance apparently non-Mendelian in nature Science, 40:904-906.
PDF image facsimile file: 530,978 bytes - 3 pages

Little, C. C. 1917. The Relation of Yellow Coat Color and Black-eyed White Spotting of Mice in Inheritance Genetics, 2: 433-444.
PDF image facsimile file

Luria, S. E., and Delbrück, M. 1943. Mutations of bacteria from virus sensitivity to virus resistance. Genetics, 28:491-511
PDF typeset file: 201,354 bytes - 37 pages - several figures

Müller, F. 1869. Facts and Arguments for Darwin. London: John Murray, Albemarle Street
PDF image facsimile file: 27,408,859 bytes - 152 pages - several figures

Macarthur, John W. 1933. Sex-linked Genes in the Fowl Genetics, 18: 210-220.
PDF image facsimile file

Malthus, T. 1798. An Essay on the Principle of Population.
PDF typeset file: 948,754 bytes - 134 pages - no figures

McClintock, Barbara and Hill, Henry E. 1931. The cytological identification of the chromosome sssociated with the r-g linkage group in Zea mays Genetics, 16: 175-190.
PDF image facsimile file

McClintock, Barbara 1929. A cytological and genetical study of triploid maize Genetics, 14: 180-222.
PDF image facsimile file

McClintock, Barbara. 1931. The order of the genes C, Sh, and Wx in Zea mays with reference to a cytologically known point in the chromosome. PNAS, 17:485-491.
PDF image facsimile file: 7 pages - several figures

McClung, C. E. 1901. Notes on the accessory chromosome. Anatomischer Anzeiger, 20:220-226.
PDF typeset file: 58,569 bytes - 12 pages - no figures

McClung, C. E. 1902. The accessory chromosome - Sex determinant? Biological Bulletin, 3:43-84.
PDF typeset file: 188,601 bytes - 40 pages - no figures

Mendel - de Vries - Correns - Tschermak 1950. The Birth of Genetics Special supplement to the journal Genetics 35(5, pt 2): 1-48.
PDF typeset file: 344,064 bytes - 66 pages - no figures

Mendel, Gregor 1866-1873. Gregor Mendel's letters to Carl Nägeli, 1866-1873. First published in English as: Mendel, G. 1950. Gregor Mendel's Letters to Carl Nägeli. Genetics, 35(5, pt 2): 1-29. Originally published as: Abhandlungen der Mathematisch-Physischen Klasse der Königlich Sächsischen Gesellschaft der Wissenschaften 29: 189-265, 1905. Reprinted in "Carl Correns, Gesammelte Abhandlungen zur Vererbungswissenschaft aus periodischen Schriften" 1899-1924. (Fritz V. Wettstein ed.) Berlin, Julius Springer, 1924. pp. 1237-1281.
PDF typeset file: 206,438 bytes - 36 pages - no figures

Mendel, Gregor 1869. On Hieracium-hybrids obtained by artificial fertilisation. Verhandlungen des naturforschenden Vereines, Abhandlungen, Brünn, Bd. VIII für das Jahr 1869, 26-31. (Translated and reprinted as an appendix to Bateson, W. 1909. Mendel's Principles of Heredity. Cambridge University Press.)
PDF typeset file: 57,344 bytes - 8 pages - no figures

Mendel, Gregor. 1865. Experiments in plant hybridization. Verhandlungen des naturforschenden Vereines in Brünn, Bd. IV für das Jahr 1865, Abhandlungen, 3-47.
PDF image facsimile file: 2,142,414 bytes - 47 pages - no figures

Mendel, Gregor. 1865. Experiments in plant hybridization. Verhandlungen des naturforschenden Vereines in Brünn, Bd. IV für das Jahr 1865, Abhandlungen, 3-47.
PDF typeset file: 395,699 bytes - 41 pages - no figures

Metz, C. W. 1937. Small Deficiencies and the Problem of Genetic Units in the Giant Chromosomes Genetics, 22: 543-556.
PDF image facsimile file

Mohr, Otto L. 1932. Genetical and cytological proof of somatic elimination of the fourth chromosome in Drosophila melanogaster Genetics, 17: 60-80.
PDF image facsimile file

Morgan, L. V. 1925. Polyploidy in drosophila Melanogaster with Two Attached X Chromosomes Genetics, 10: 148-178.
PDF image facsimile file

Morgan, L. V. 1933. A Closed X Chromosome in Drosophila Melanogaster Genetics, 18: 250-283.
PDF image facsimile file

Morgan, L. V. 1939. A Spontaneous Somatic Exchange Between Non-homologous Chromosomes in Drosophila Melanogaster Genetics, 24: 747-752.
PDF image facsimile file

Morgan, Thomas H. 1909. What are "factors" in Mendelian explanations? American Breeders Association Reports, 5:365-369.
PDF typeset file: 108,227 bytes - 4 pages - no figures

Morgan, Thomas H. 1910. Chromosomes and Heredity. The American Naturalist, 44:449-496.
PDF typeset file: 222,436 bytes - 38 pages - one figure

Morgan, Thomas H. 1910. Chromosomes and heredity. The American Naturalist, 44: 449-496.
PDF typeset file: 284,612 bytes - 38 pages - no figures

Morgan, Thomas H. 1910. Sex-limited inheritance in Drosophila. Science, 32:120-122.
PDF typeset file: 72,823 bytes - 14 pages - no figures

Morgan, Thomas H. 1911. Chromosomes and associative inheritance. Science, New Series, 34:636-638.
PDF image facsimile file: 613,691 bytes - 3 pages - 0 figures

Morgan, Thomas H. 1911. Random segregation versus coupling in Mendelian inheritance Science, 34:384.
PDF image facsimile file: 189,193 bytes - 1 page

Morgan, Thomas H. 1911. The origin of five mutations in eye color in Drosophila and their modes of inheritance. Science, New Series, 33:534-537.
PDF image facsimile file: 694,626 bytes - 4 pages - 0 figures

Morgan, Thomas H. 1911. The origin of nine wing mutations in Drosophila. Science, New Series, 33:496-499.
PDF image facsimile file: 688,689 bytes - 4 pages - 0 figures

Morgan, Thomas H. 1912. Complete linkage in the second chromosome of the male of Drosophila Science, 36:933-934.
PDF image facsimile file: 325,825 bytes - 2 pages

Morgan, Thomas H. 1913. Factors and Unit Characters in Mendelian Heredity. The American Naturalist, 47:5-16.
PDF image facsimile file: 741,353 bytes - 14 pages - 0 figures

Morgan, Thomas H. 1913. Simplicity versus adequacy in Mendelian formulae The American Naturalist, 47:372-374
PDF typeset file: 32,835 bytes - 6 pages - no figures

Morgan, Thomas H. 1915. The Constitution of the Hereditary Material. Proceedings of the American Philosophical Society, 54:143-153.
PDF image facsimile file: 424,504 bytes - 11 pages - 4 figures

Morgan, Thomas H. 1917. The Theory of the Gene. The American Naturalist, 51:513-544.
PDF typeset file: 3,116,439 bytes - 28 pages - 9 figures

Morgan, Thomas H. 1919. The Physical Basis of Heredity. Philadelphia: J. B. Lippincott Company
This is a full-text PDF image facsimile version of the entire 305-page original book.

Morgan, Thomas H. 1922. Croonian Lecture: On the Mechanism of Heredity. Proceedings of the Royal Society, B, 94:162-197.
PDF typeset file: 3,916,605 bytes - 42 pages - 35 figures

Morgan, Thomas H. 1923. The bearing of Mendelism on the origin of species. The Scientific Monthly, 16: 237-247.
PDF typeset file: 247,951 bytes - 54 pages - no figures

Morgan, Thomas H. 1928. The Theory of the Gene, Revised and Enlarged Edition. New Haven: Yale University Press
This is a full-text PDF image facsimile version of the entire 358-page original book.

Morgan, Thomas H., Sturtevant, A. H., Muller, H. J., and C. B. Bridges 1915. The Mechanism of Mendelian Heredity. New York: Henry Holt and Company
This is a full-text PDF image facsimile version of the entire 262-page original book.

Morgan, Thomas Hunt 1897. The Development of the Frog's Egg: An Introduction to Experimental Embryology. New York: The Macmillan Company
PDF image facsimile file: 46,153,994 bytes bytes - 204 pages - several figures

Muller, H. J. and Jacobs-muller, Jessie M. 1925. The Standard Errors of Chromosome Distances and Coincidence Genetics, 10: 509-524.
PDF image facsimile file

Muller, H. J., Raffel, D., Gershenson, S. M. , and Prokofyeva-Belgovskaya, A. A. 1937. A Further Analysis of Loci in the So-called "inert Region" of the X Chromosome of Drosophila Genetics, 22: 87-93.
PDF image facsimile file

Muller, Hermann J. 1916. The Mechanism of Crossing-over. New York: The American Naturalist
This is an image facsimile version of the entire 86-page original edition.

Muller, Hermann J. 1918. Genetic Variability, Twin Hybrids and Constant Hybrids, in a Case of Balanced Lethal Factors Genetics, 3: 422-499.
PDF image facsimile file

Muller, Hermann J. 1918. Genetic variability, twin hybrids and constant hybrids, in a case of balanced lethal factors.. Genetics, 3:422-499.
PDF image facsimile file: 78 pages

Muller, Hermann J. 1922. Variation due to change in the individual gene. The American Naturalist, 56:32-50.
PDF typeset file: 69,751 bytes - 17 pages - no figures

Muller, Hermann J. 1925. The regionally differential effect of X rays on crossing over in autosomes of Drosophila. Genetics, 10:470-507.
PDF image facsimile file: 38 pages

Muller, Hermann J. 1927. Artificial transmutation of the gene. Science, 46:84-87.
PDF image facsimile file: 1,002,392 bytes - 4 pages

Muller, Hermann J. 1928. The measurement of gene mutation rate in Drosophila, its high variability, and its dependence upon temperature. Genetics, 13:279-357.
PDF image facsimile file: 79 pages

Muller, Hermann J., Raffel, D., Gershenson, S. M., and Prokofya-Belgovskaya, A. A. 1937. A further analysis of loci in the so-called "inert region" of the X chromosome of Drosophila. Genetics, 22:87-93.
PDF image facsimile file: 7 pages

Muller, Hermann J., and Altenburg, Edgar. 1930. The frequency of translocations produced by X-rays in Drosophila. Genetics, 15:283-311.
PDF image facsimile file: 29 pages

Muller, Hermann J., and Jacobs-Muller, Jessie M. 1925. The standard errors of chromosome distances and coincidence. Genetics, 10:509-524.
PDF image facsimile file: 16 pages

Painter, Theophilus S. 1928. A Comparison of the Chromosomes of the Rat and Mouse with Reference to the Question of Chromosome Homology in Mammals Genetics, 13: 180-189.
PDF image facsimile file

Painter, Theophilus S. 1935. The Morphology of the Third Chromosome in the Salivary Gland of Drosophila Melanogaster and a New Cytological Map of this Element Genetics, 20: 301-326.
PDF image facsimile file

Painter, Theophilus S. and Griffen, Allen B. 1937. The Structure and the Development of the Salivary Gland Chromosomes of Simulium Genetics, 22: 612-633.
PDF image facsimile file

Painter, Theophilus S. and Stone, Wilson 1935. Chromosome Fusion and Speciation in Drosophilae Genetics, 20: 327-341.
PDF image facsimile file

Painter, Theophilus S. 1934. A New Method For the Study of Chromosome Aberrations and the Plotting of Chromosome Maps in Drosophila melanogaster. Genetics, 19: 175-188.
PDF image facsimile file: 915,967 bytes - 14 pages - 2 figures

Painter, Theophilus S. 1934. The Morphology of the X Chromosome in Salivary Glands of Drosophila melanogaster and a New Type of Chromosome Map for this Element. Genetics, 19: 448-469.
PDF image facsimile file: 1,519,775 bytes - 22 pages - 2 figures

Patterson, J. T. and Muller, H. J. 1930. Are "progressive" mutations produced by X-rays? Genetics, 15: 495-577.
PDF image facsimile file

Patterson, J. T. 1933. The Mechanism of Mosaic Formation in Drosophila Genetics, 18: 32-52.
PDF image facsimile file

Payne, F. 1924. Crossover Modifiers in the Third Chromosome of Drosophila melanogaster Genetics, 9: 327-342.
PDF image facsimile file

Plough, Harold H. and Ives, Philip T. 1935. Induction of Mutations by High Temperature in Drosophila Genetics, 20: 42-69.
PDF image facsimile file

Punnett, R. C. 1905. Mendelism, 1st Edition. Cambridge: Bowes and Bowes
PDF image facsimile file: 1,382,040 bytes - 71 pages - several figures

Punnett, R. C. 1907. Mendelism, 2nd Edition. Cambridge: Bowes and Bowes
PDF image facsimile file: 1,832,735 bytes - 93 pages - several figures

Rhoades, Marcus M. 1933. An Experimental and Theoretical Study of Chromatid Crossing Over Genetics, 18: 535-555.
PDF image facsimile file

Riddle, Oscar. 1924. Any Hereditary Character and the Kinds of Things We Need to Know About It. The American Naturalist, LVIII:410-425.
PDF typeset file: 80,148 bytes - 13 pages - no figures

Schultz, Jack 1929. The minute reaction in the development of Drosophila melanogaster Genetics, 14: 366-419.
PDF image facsimile file

Schultz, Jack 1933. X-ray Effects on Drosophila Pseudo-obscura Genetics, 18: 284-291.
PDF image facsimile file

Schultz, Jack, and Dobzhansky, Th. 1934. The Relation of a Dominant Eye Color in Drosophila Melanogaster to the Associated Chromosome Rearrangement Genetics, 19: 344-364.
PDF image facsimile file

Shull, A. Franklin 1922. Ten Years of Heredity. Transactions of the American Microscopical Society, 41:82-100.
PDF image facsimile file: 909,722 bytes - 19 pages - 8 figures

Shull, G. H. 1915. Genetic Definitions in the New Standard Dictionary. The American Naturalist, 49:52-59.
PDF typeset file: 78,002 bytes - 12 pages - no figures

Shull, George H. 1923. A permanent memorial to Galton and Mendel. The Scientific Monthly, 16: 263-270.
PDF typeset file: 247,951 bytes - 54 pages - no figures

Shull, George Harrison 1909. The "Presence and Absence" Hypothesis. The American Naturalist, 43:410-419.
PDF image facsimile file: 655,705 bytes - 10 pages - 0 figures

Sivertzev-Dobzhansky, N. P. and Dobzhansky, Th. 1933. Deficiency and Duplications For the Gene Bobbed in Drosophila Melanogaster Genetics, 18: 413.
PDF image facsimile file

Snyder, Laurence H. 1924. The Inheritance of the Blood Groups Genetics, 9: 465-478.
PDF image facsimile file

Snyder, Laurence H. 1934. Studies in Human Inheritance. X. a Table to Determine the Proportion of Recessives to Be Expected in Various Matings Involving a Unit Character Genetics, 19: 1-17.
PDF image facsimile file

Stadler, L. J. 1926. The Variability of Crossing Over in Maize Genetics, 11: 1-37.
PDF image facsimile file

Stern, Curt and Bridges, Calvin B. 1926. The Mutants of the Extreme Left End of the Second Chromosome of Drosophila melanogaster Genetics, 11: 503-530.
PDF image facsimile file

Stevens, Nettie M. 1905. Studies in Spermatogenesis with especial reference to the "accessory chromosome". Carnegie Institution of Washington, Publication No. 36., pp 1-33.
PDF image facsimile file: 1,448,192 bytes - 33 pages - 7 plates

Stevens, Nettie M. 1906. Studies in Spermatogenesis Part II., A comparative study of the heterochromosomes in certain species of coleoptera, hemiptera and lepidoptera, with especial reference to sex determination. Carnegie Institution of Washington, Publication No. 36, part II., pp 1-43.
PDF image facsimile file: 1,936,652 bytes - 43 pages - 8 plates

Stevens, Nettie M. 1906. Studies on the germ cells of aphids. Carnegie Institution of Washington, Publication No. 51., pp 1-28.
PDF image facsimile file: 1,180,954 bytes - 28 pages - 4 plates

Sturtevant, A. H. and Beadle, G. W. 1936. The Relations of Inversions in the X Chromosome of Drosophila Melanogaster to Crossing Over and Disjunction Genetics, 21: 554-604.
PDF image facsimile file

Sturtevant, A. H. and Dobzhansky, Th. 1936. Geographical Distribution and Cytology of "sex Ratio" in Drosophila Pseudoobscura and Related Species Genetics, 21: 473-490.
PDF image facsimile file

Sturtevant, A. H. 1917. Crossing Over without Chiasmatype? Genetics, 2:301-304.
PDF image facsimile file: 220,991 bytes - 4 pages - no figures

Sturtevant, A. H. 1936. Preferential Segregation in Triplo-IV Females of Drosophila Melanogaster Genetics, 21: 444-466.
PDF image facsimile file

Sturtevant, A. H., Bridges, C. B., and Morgan, T. H. 1919. The spatial relations of genes. Proceedings of the National Academy of Sciences, 5:168-173.
PDF image facsimile file: 727,921 bytes - 6 pages

Sturtevant, Alfred H. 1965. A History of Genetics. First published in 1965, it was brought back into print in 2001 by Cold Spring Harbor Laboratory Press and the Electronic Scholarly Publishing project.
This is a full-text PDF typeset version of the entire 167-page original book.

Sturtevant, Alfred H. 1913. The linear arrangement of six sex-linked factors in Drosophila, as shown by their mode of association. Journal of Experimental Biology, 14:43-59.
PDF typeset file: 109,620 bytes - 22 pages - no figures

Sturtevant, Alfred H. 1920. Genetic studies on Drosophila simulans. I. Introduction. Hybrids with Drosophila melanogaster. Genetics, 5:488-500.
PDF image facsimile file: 13 pages - 5 figures

Sturtevant, Alfred H. 1921. Genetic studies on Drosophila simulans. II. Sex-linked groups of genes. Genetics, 6:43-64.
PDF image facsimile file: 22 pages - 5 figures

Sturtevant, Alfred H. 1921. Genetic studies on Drosophila simulans. III. Autosomal genes. General discussion. Genetics, 6:179-207.
PDF image facsimile file: 29 pages - 6 figures

Sturtevant, Alfred H. 1923. Inheritance of the direction of coiling in Limnaea. Science, 58:269-270.
PDF typeset file: 150,314 bytes - 7 pages - no figures

Sturtevant, Alfred H. 1925. The effects of unequal crossing over at the bar locus in Drosophila. Genetics, 10:117-147.
PDF image facsimile file: 31 pages - 10 figures

Sturtevant, Alfred H. 1928. A further study of the so-called mutation at the bar locus of Drosophila. Genetics, 13:401-409.
PDF image facsimile file: 9 pages - no figures

Sutton, Walter S. 1902. On the morphology of the chromosome group in Brachystola magna. Biological Bulletin, 4:24-39.
PDF typeset file: 119,906 bytes - 18 pages - 11 figures

Sutton, Walter S. 1903. The chromosomes in heredity. Biological Bulletin, 4: 231-251.
PDF typeset file: 133,686 bytes - 20 pages - no figures

Taliaferro, W. H., and Huck, J. G. 1923. The Inheritance of Sickle-cell Anaemia in Man Genetics, 8: 594-598.
PDF image facsimile file

Tan, C. C. 1936. Genetic Maps of the Autosomes in Drosophila Pseudoobscura Genetics, 21: 796-807.
PDF image facsimile file

Thomson, J. Arthur. 1908. Heredity. London: John Murray
This is a PDF image facsimile version of the entire 596-page original first edition.

Tschermak, Erik von 1900. Concerning artificial crossing in Pisum sativum First published in English as: Tschermak, E. 1950. Concerning artificial crossing in Pisum sativum. Genetics, 35(5, pt 2): 42-47. Originally published as: Tschermak, E. 1900. Über Künstliche Kreuzung bei Pisum sativum. Berichte der Deutsche Botanischen Gesellschaft 18: 232-239, 1900.
PDF typeset file: 62,114 bytes - 10 pages - no figures

Vries, Hugo De 1925. Mutant Races Derived from oenothera Lamarckiana Semigigas Genetics, 10: 211-222.
PDF image facsimile file

Vries, Hugo de 1900. Concerning the law of segregation of hybrids. First published in English as: De Vries, H.. 1950. Concerning the law of segregation of hybrids. Genetics, 35(5, pt 2): 30-32. Originally published as: De Vries, H. 1900. Sur la loi de disjonction des hybrides. Comptes Rendus de l'Academie des Sciences (Paris), 130: 845-847.
PDF typeset file: 35,435 bytes - 6 pages - no figures

Vries, Hugo de 1918. Mutations of Oenothera suaveolens desf. Genetics, 3:1-26.
PDF image facsimile file: 26 pages

Vries, Hugo de 1918. Twin hybrids of Oenothera hookeri T. and G.. Genetics, 3:397-421.
PDF image facsimile file: 25 pages

Vries, Hugo de 1925. Mutant races derived from Oenothera lamarckiana semigigas. Genetics, 10:211-222.
PDF image facsimile file: 12 pages

Vries, Hugo de, and Boedijn, K. 1923. On the distribution of mutant characters among the chromosomes of Oenothera lamarckiana. Genetics, 8:233-238.
PDF image facsimile file: 6 pages

Vries, Hugo de. 1910. Intracellular Pangenesis. Chicago: The Open Court Publishing Co.
This is a full-text PDF image facsimile version of the entire 270-page original book

Wallace. A. R. 1855. On the law which has regulated the introduction of new species. Annals and Magazine of Natural History, 2nd Series. 16:184-196.
PDF typeset file: 90,845 bytes - 17 pages - no figures

Weinberg, Wilhelm 1908. Über Vererbungsgesetze beim Menschen. Zeitschrift für Induktive Abstammungs- und Vererbungslehre, 1:377-392.
PDF image facsimile file

Weinstein, Alexander 1936. The Theory of Multiple-strand Crossing Over Genetics, 21: 490.
PDF image facsimile file

Weinstein, Alexander 1936. The Theory of Multiple-strand Crossing Over Genetics, 21: 155-199.
PDF image facsimile file

Weinstein, Alexander 1918. Coincidence of Crossing Over in drosophila Melanogaster (ampelophila) Genetics, 3: 135-172.
PDF image facsimile file

Weismann, August 1889. Essays Upon Heredity. Oxford at the Clarendon Press
This is a full-text PDF image facsimile version of the entire 700-plus pages of the original volumes.

Weismann, August 1893. The Germ-Plasm. New York: Charles Scribner's Sons
This is a full-text PDF image facsimile version of the entire 477-page original book.

Weldon, W. F. R. 1902. Mendel's laws of alternative inheritance in peas. Biometrika, 1:228-254.
PDF typeset file: 1,430,843 bytes - 33 pages - several figures

Wilson, Edmund B. 1900. The Cell in Development and Inheritance, 2nd Edition New York: The Macmillan Company
This is a full-text PDF image facsimile version of the entire 490-page original book.

Wilson, Edmund B. 1902. Mendel's principles of heredity and the maturation of the germ cells. Science, NS 16: 991-993.
PDF typeset file: 40,134 bytes - 5 pages - no figures

Wilson, Edmund B. 1905. The chromosomes in relation to the determination of sex in insects. Science, N.S. 22:500-502.
PDF typeset file: 43,282 bytes - 8 pages - no figures

Wilson, Edmund B. 1909. Recent researches on the determination and heredity of sex. Science, NS 29:53-70.
PDF image facsimile file: 18 pages

Wilson, Edmund B. 1909. Secondary chromosome-couplings and the sexual relations in Abraxas. Science, NS 29:704-706.
PDF image facsimile file: 3 pages

Wright, Sewall and Chase, Herman B. 1936. On the Genetics of the Spotted Pattern of the Guinea Pig Genetics, 21: 758-787.
PDF image facsimile file

Wright, Sewall 1918. On the nature of size factors. Genetics, 3:367-374.
PDF image facsimile file: 8 pages - 0 figures

Wright, Sewall 1921. Systems of mating. I. The biometric relations between parent and offspring. Genetics, 6:111-123.
PDF image facsimile file: 13 pages - 2 figures

Wright, Sewall 1921. Systems of mating. II. The effects of inbreeding on the genetic composition of a population. Genetics, 6:124-143.
PDF image facsimile file: 20 pages - 12 figures

Wright, Sewall 1921. Systems of mating. III. Assortative mating based on somatic resemblance. Genetics, 6:144-161.
PDF image facsimile file: 18 pages - 7 figures

Wright, Sewall 1921. Systems of mating. IV. The effects of selection. Genetics, 6:162-166.
PDF image facsimile file: 5 pages - 1 figure

Wright, Sewall 1921. Systems of mating. V. General considerations. Genetics, 6:167-178.
PDF image facsimile file: 12 pages - 7 figures

Wright, Sewall 1925. The factors of the albino series of guinea-pigs and their effects on black and yellow pigmentation. Genetics, 10:223-260.
PDF image facsimile file: 38 pages - 5 figures

Wright, Sewall 1927. The effects in combination of the major color-factors of the guinea pig Genetics, 12: 530-569.
PDF image facsimile file

Wright, Sewall 1928. An eight-factor cross in the guinea pig Genetics, 13: 508-531.
PDF image facsimile file

Wright, Sewall 1931. Evolution in Mendelian populations. Genetics, 16:97-159.
PDF image facsimile file: 63 pages - 21 figures

Wright, Sewall 1932. General, Group and Special Size Factors Genetics, 17: 603-619.
PDF image facsimile file

Wright, Sewall 1934. An Analysis of Variability in Number of Digits in an Inbred Strain of Guinea Pigs Genetics, 19: 506-536.
PDF image facsimile file

Wright, Sewall 1934. On the Genetics of Subnormal Development of the Head (otocephaly) in the Guinea Pig Genetics, 19: 471-505.
PDF image facsimile file

Wright, Sewall 1934. The Results of Crosses Between Inbred Strains of Guinea Pigs, Differing in Number of Digits Genetics, 19: 537-551.
PDF image facsimile file

Wright, Sewall 1935. A Mutation of the Guinea Pig, Tending to Restore the Pentadactyl Foot When Heterozygous, Producing a Monstrosity When Homozygous Genetics, 20: 84-107.
PDF image facsimile file

Wright, Sewall and Eaton, O. N. 1926. Mutational Mosaic Coat Patterns of the Guinea Pig Genetics, 11: 333-351.
PDF image facsimile file

Wright, Sewall. 1931. Evolution in Mendelian populations. Genetics, 16:97-159.
PDF image facsimile file: 3.037,667 bytes - 63 pages - several figures

Wright, Sewall. 1932. Complementary Factors for Eye Color in Drosophila. The American Naturalist, LXVI:282-283.
PDF typeset file: 7,701 bytes - 2 pages - no figures

Yule, G. Udny 1902. Mendel's laws and their probably relations to intra-racial heredity. The New Phytologist, 1:193-207,222-238.
PDF image facsimile file: 32 pages