. Bridges, Calvin B., and Olbrycht, T. M. 1926. Genetics, 11:41-55.
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A Diagram of Heredity. Galton, Francis. 1898. Nature, 57:293.
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A History of Genetics. Sturtevant, Alfred H. 1965. 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.

A Lecture on Mendelism. Drinkwater, H. 1910. London: J. M. Dent & Sons.
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A chronology of genetics. Cook, Robert. 1937. Yearbook of Agriculture, pp. 1457-1477.
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A correlation of cytological and genetical crossing-over in Zea mays. Creighton, Harriet B., and McClintock, Barbara. 1931. PNAS, 17:492-497.
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A cytological basis for the Mendelian laws. Cannon, W. A. 1902. Bulletin of the Torrey Botanical Club, 29:657-661.
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A further analysis of loci in the so-called "inert region" of the X chromosome of Drosophila. Muller, Hermann J., Raffel, D., Gershenson, S. M., and Prokofya-Belgovskaya, A. A. 1937. Genetics, 22:87-93.
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A further study of the so-called mutation at the bar locus of Drosophila. Sturtevant, Alfred H. 1928. Genetics, 13:401-409.
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A new Method for the Study of Chromosome Maps in Drosophila melanogaster. Painter, Theophilus S. 1934. Genetics, 19: 175-188.
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A permanent memorial to Galton and Mendel. Shull, George H. 1923. The Scientific Monthly, 16: 263-270.
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A possible Mendelian explanation for a type of inheritance apparently non-Mendelian in nature Little, C. C. 1914. Science, 40:904-906.
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An Essay on the Principle of Population. Malthus, T. 1798.
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Any Hereditary Character and the Kinds of Things We Need to Know About It. Riddle, Oscar. 1924. The American Naturalist, LVIII:410-425.
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Application for Support of an Experimental Investigation of Mendel's Principles of Heredity in Animals and Plants. Bateson, William. 1902. In Bateson, B. 1928. William Bateson, F.R.S.: His Essays & Addresses, together with a Short Account of his Life. Cambridge: Cambridge University Press.
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Artificial transmutation of the gene. Muller, Hermann J. 1927. Science, 46:84-87.
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Chromosomes and Heredity. Morgan, Thomas H. 1910. The American Naturalist, 44:449-496.
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Chromosomes and associative inheritance. Morgan, Thomas H. 1911. Science, New Series, 34:636-638.
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Chromosomes and heredity. Morgan, Thomas H. 1910. The American Naturalist, 44: 449-496.
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Complementary Factors for Eye Color in Drosophila. Wright, Sewall. 1932. The American Naturalist, LXVI:282-283.
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Complete linkage in the second chromosome of the male of Drosophila Morgan, Thomas H. 1912. Science, 36:933-934.
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Concerning artificial crossing in Pisum sativum Tschermak, Erik von 1900. 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.
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Concerning the law of segregation of hybrids. Vries, Hugo de 1900. 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.
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Croonian Lecture: On the Mechanism of Heredity. Morgan, Thomas H. 1922. Proceedings of the Royal Society, B, 94:162-197.
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Crossing Over ohne Chiasmatypie? Goldschmidt, Richard 1917. Genetics, 2:82-95.
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Crossing Over without Chiasmatype? Sturtevant, A. H. 1917. Genetics, 2:301-304.
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Crossing over in the X chromosomes of triploid females of Drosophila melanogaster.. Bridges, Calvin B., and Anderson, E. G. 1925. Genetics, 10:418-441.
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Deficiency. Bridges, Calvin B. 1917. Genetics, 2:445-465.
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Direct proof through non-disjunction that the sex-linked genes of Drosophila are borne on the X-chromosome. Bridges, Calvin B. 1914. Science, NS vol. XL:107-109.
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Essays Upon Heredity. Weismann, August 1889. Oxford at the Clarendon Press
This is a full-text PDF image facsimile version of the entire 700-plus pages of the original volumes.

Evolution in Mendelian populations. Wright, Sewall 1931. Genetics, 16:97-159.
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Evolution in Mendelian populations. Wright, Sewall. 1931. Genetics, 16:97-159.
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Experimental Studies in the Physiology of Heredity. Bateson, William, Saunders, E. R., and Punnett, R. C. 1904. Reports to the Evolution Committee of the Royal Society, II, 1904, pp. 1-131
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Experiments in plant hybridization. Mendel, Gregor. 1865. Verhandlungen des naturforschenden Vereines in Brünn, Bd. IV für das Jahr 1865, Abhandlungen, 3-47.
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Experiments in plant hybridization. Mendel, Gregor. 1865. Verhandlungen des naturforschenden Vereines in Brünn, Bd. IV für das Jahr 1865, Abhandlungen, 3-47.
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Experiments with Poultry. Hurst, C. C. 1904. Reports to the Evolution Committee of the Royal Society, II, 1904, pp. 131-154
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Factors and Unit Characters in Mendelian Heredity. Morgan, Thomas H. 1913. The American Naturalist, 47:5-16.
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G. Mendel's law concerning the behavior of progeny of varietal hybrids. Correns, Carl 1900. 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.
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Galton and Mendel: Their contribution to genetics and their influence on biology. Harris, J. Arthur 1923. The Scientific Monthly, 16: 247-263.
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Genetic Definitions in the New Standard Dictionary. Shull, G. H. 1915. The American Naturalist, 49:52-59.
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Genetic studies on Drosophila simulans. I. Introduction. Hybrids with Drosophila melanogaster. Sturtevant, Alfred H. 1920. Genetics, 5:488-500.
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Genetic studies on Drosophila simulans. II. Sex-linked groups of genes. Sturtevant, Alfred H. 1921. Genetics, 6:43-64.
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Genetic studies on Drosophila simulans. III. Autosomal genes. General discussion. Sturtevant, Alfred H. 1921. Genetics, 6:179-207.
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Genetic variability, twin hybrids and constant hybrids, in a case of balanced lethal factors.. Muller, Hermann J. 1918. Genetics, 3:422-499.
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Genetical and cytological studies of a deficiency (notopleural) in the second chromosome of Drosophila melanogaster. Bridges, Calvin B., Skoog, Eleanor Nichols, and Li, Ju-chi. 1936. Genetics, 21:788-795.
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Gregor Mendel's letters to Carl Nägeli, 1866-1873. Mendel, Gregor 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.
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Heredity in Relation to Evolution and Animal Breeding. Castle, W. E. 1911. New York: D. Appleton and Company
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Heredity in the Light of Recent Research. Doncaster, L. 1911. Cambridge: University Press
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Heredity. Thomson, J. Arthur. 1908. London: John Murray
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Hybridisation and cross-breeding as a method of scientific investigation. Bateson, William. 1899. Journal of the Royal Horticultural Society, 24:59-66.
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Inborn Errors of Metabolism, Second Edition. Garrod, Archibald. 1923. London: Henry Frowde and Hodder & Stoughton
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Inheritance of the direction of coiling in Limnaea. Sturtevant, Alfred H. 1923. Science, 58:269-270.
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Intracellular Pangenesis. Vries, Hugo de. 1910. Chicago: The Open Court Publishing Co.
This is a full-text PDF image facsimile version of the entire 270-page original book

Is the arrangement of the genes in the chromosome linear? Castle, W.E. 1919. Proceedings of the National Academy of Sciences, 5:25-32.
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Materials for the Study of Variation. Bateson, William. 1894. London: Macmillan and Company.
This is a full-text PDF image facsimile version of the entire 598-page original first edition.

Mendel and his contemporaries. East, E. M. 1923. The Scientific Monthly, 16: 225-237.
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Mendel's Principles of Heredity: A Defence. Bateson, William. 1902. London: Cambridge University Press.
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Mendel's laws of alternative inheritance in peas. Weldon, W. F. R. 1902. Biometrika, 1:228-254.
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Mendel's principles of heredity and the maturation of the germ cells. Wilson, Edmund B. 1902. Science, NS 16: 991-993.
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Mendelian Proportions in a Mixed Population. Hardy, G. H. 1908. Science, NS. XXVIII:49-50.
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Mendelism, 1st Edition. Punnett, R. C. 1905. Cambridge: Bowes and Bowes
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Mendelism, 2nd Edition. Punnett, R. C. 1907. Cambridge: Bowes and Bowes
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Mutant races derived from Oenothera lamarckiana semigigas. Vries, Hugo de 1925. Genetics, 10:211-222.
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Mutations of Oenothera suaveolens desf. Vries, Hugo de 1918. Genetics, 3:1-26.
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Mutations of bacteria from virus sensitivity to virus resistance. Luria, S. E., and Delbrück, M. 1943. Genetics, 28:491-511
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Natural Inheritance. Galton, Francis 1889. London: Macmillan
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Non-disjunction as proof of the chromosome theory of heredity (part 1). Bridges, Calvin B. 1916. Genetics, B, 1:1-52.
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Non-disjunction as proof of the chromosome theory of heredity (part 2). Bridges, Calvin B. 1916. Genetics, B, 1:107-163.
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Notes on the accessory chromosome. McClung, C. E. 1901. Anatomischer Anzeiger, 20:220-226.
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On Hieracium-hybrids obtained by artificial fertilisation. Mendel, Gregor 1869. 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.)
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On a modified Mendelian ratio among yellow mice. Castle, W. E., and Little, C. C. 1910. Science, N.S., 32:868-870.
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On the Generation of Animals. Aristotle. 350 BC.
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On the Natural Faculties. Galen. 170 AD.
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On the Origin of Species. Darwin, C. 1859. London: John Murray, Albemarle Street.
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On the Parts of Animals. Aristotle. 350 BC.
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On the distribution of mutant characters among the chromosomes of Oenothera lamarckiana. Vries, Hugo de, and Boedijn, K. 1923. Genetics, 8:233-238.
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On the law which has regulated the introduction of new species. Wallace. A. R. 1855. Annals and Magazine of Natural History, 2nd Series. 16:184-196.
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On the morphology of the chromosome group in Brachystola magna. Sutton, Walter S. 1902. Biological Bulletin, 4:24-39.
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On the nature of size factors. Wright, Sewall 1918. Genetics, 3:367-374.
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Problems of heredity as a subject for horticultural investigation. Bateson, William. 1900. Journal of the Royal Horticultural Society, 25:54-61.
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Proceedings of the Sixth International Congress of Genetics, Vol. I. Jones, Donald F. (ed) 1932. Austin, Texas: Genetics Society of America
This is an image facsimile version of the entire 396-page original edition.

Random segregation versus coupling in Mendelian inheritance Morgan, Thomas H. 1911. Science, 34:384.
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Sex-limited inheritance in Drosophila. Morgan, Thomas H. 1910. Science, 32:120-122.
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Simplicity versus adequacy in Mendelian formulae Morgan, Thomas H. 1913. The American Naturalist, 47:372-374
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Simplification of Mendelian formulae. Castle, W. E. 1913. The American Naturalist, 47:170-182
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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. Stevens, Nettie M. 1906. Carnegie Institution of Washington, Publication No. 36, part II., pp 1-43.
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Studies in Spermatogenesis with especial reference to the "accessory chromosome". Stevens, Nettie M. 1905. Carnegie Institution of Washington, Publication No. 36., pp 1-33.
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Studies on the germ cells of aphids. Stevens, Nettie M. 1906. Carnegie Institution of Washington, Publication No. 51., pp 1-28.
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Systems of mating. I. The biometric relations between parent and offspring. Wright, Sewall 1921. Genetics, 6:111-123.
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Systems of mating. II. The effects of inbreeding on the genetic composition of a population. Wright, Sewall 1921. Genetics, 6:124-143.
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Systems of mating. III. Assortative mating based on somatic resemblance. Wright, Sewall 1921. Genetics, 6:144-161.
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Systems of mating. IV. The effects of selection. Wright, Sewall 1921. Genetics, 6:162-166.
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Systems of mating. V. General considerations. Wright, Sewall 1921. Genetics, 6:167-178.
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Ten Years of Heredity. Shull, A. Franklin 1922. Transactions of the American Microscopical Society, 41:82-100.
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The "Presence and Absence" Hypothesis. Shull, George Harrison 1909. The American Naturalist, 43:410-419.
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The Birth of Genetics Mendel - de Vries - Correns - Tschermak 1950. Special supplement to the journal Genetics 35(5, pt 2): 1-48.
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The Cell in Development and Inheritance, 2nd Edition Wilson, Edmund B. 1900. New York: The Macmillan Company
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The Centenary of Gregor Mendel and of Francis Galton. East - Morgan - Harris - Shull 1923. The Scientific Monthly, 16: 225-270.
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The Constitution of the Hereditary Material. Morgan, Thomas H. 1915. Proceedings of the American Philosophical Society, 54:143-153.
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The Germ-Plasm. Weismann, August 1893. New York: Charles Scribner's Sons
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The History of Animals. Aristotle. 350 BC.
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The Law of Heredity, Second Edition. Brooks, W. K. 1883. Baltimore and New York: John Murphy & Co., Publishers.
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The Mechanism of Crossing-over. Muller, Hermann J. 1916. New York: The American Naturalist
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The Mechanism of Mendelian Heredity. Morgan, Thomas H., Sturtevant, A. H., Muller, H. J., and C. B. Bridges 1915. New York: Henry Holt and Company
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The Methods and Scope of Genetics. Bateson, William. 1908. London: Cambridge University Press.
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The Morphology of the X Chromosome in Salivary Glands of Drosophila melanogaster and a New Type of Chromosome Map for this Element. Painter, Theophilus S. 1934. Genetics, 19: 448-469.
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The Physical Basis of Heredity. Morgan, Thomas H. 1919. Philadelphia: J. B. Lippincott Company
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The Theory of the Gene, Revised and Enlarged Edition. Morgan, Thomas H. 1928. New Haven: Yale University Press
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The Theory of the Gene. Morgan, Thomas H. 1917. The American Naturalist, 51:513-544.
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The Variation of Animals and Plants Under Domestication, Second Edition, Revised (two volumes). Darwin, C. 1883. New York: D. Appleton & Co.
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The Voyage of the Beagle, Second Edition. Darwin, C. 1845. London: John Murray.
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The accessory chromosome - Sex determinant? McClung, C. E. 1902. Biological Bulletin, 3:43-84.
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The bearing of Mendelism on the origin of species. Morgan, Thomas H. 1923. The Scientific Monthly, 16: 237-247.
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The chromosomes in heredity. Sutton, Walter S. 1903. Biological Bulletin, 4: 231-251.
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The chromosomes in relation to the determination of sex in insects. Wilson, Edmund B. 1905. Science, N.S. 22:500-502.
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The concept of the gene. East, E. M. 1929. 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.
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The effects of unequal crossing over at the bar locus in Drosophila. Sturtevant, Alfred H. 1925. Genetics, 10:117-147.
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The factors of the albino series of guinea-pigs and their effects on black and yellow pigmentation. Wright, Sewall 1925. Genetics, 10:223-260.
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The facts of heredity in the light of Mendel's discovery. Bateson, William, and Saunders, E. R. 1902. Reports to the Evolution Committee of the Royal Society, I, 1902, pp. 125-160
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The frequency of translocations produced by X-rays in Drosophila. Muller, Hermann J., and Altenburg, Edgar. 1930. Genetics, 15:283-311.
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The incidence of alkaptonuria: A study in chemical individuality. Garrod, Archibald E. 1902. Lancet, ii:1616-1620.
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The inheritance of the mutant character "vortex". Bridges, Calvin B., and Mohr, Otto L. 1919. Genetics, 4:283-306.
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The linear arrangement of six sex-linked factors in Drosophila, as shown by their mode of association. Sturtevant, Alfred H. 1913. Journal of Experimental Biology, 14:43-59.
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The measurement of gene mutation rate in Drosophila, its high variability, and its dependence upon temperature. Muller, Hermann J. 1928. Genetics, 13:279-357.
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The origin of five mutations in eye color in Drosophila and their modes of inheritance. Morgan, Thomas H. 1911. Science, New Series, 33:534-537.
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The origin of nine wing mutations in Drosophila. Morgan, Thomas H. 1911. Science, New Series, 33:496-499.
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The regionally differential effect of X rays on crossing over in autosomes of Drosophila. Muller, Hermann J. 1925. Genetics, 10:470-507.
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The relation of Mendelism to mutation and evolution. Castle, W. E. 1923. The American Naturalist, 57:559-561
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The spatial relations of genes. Sturtevant, A. H., Bridges, C. B., and Morgan, T. H. 1919. Proceedings of the National Academy of Sciences, 5:168-173.
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The standard errors of chromosome distances and coincidence. Muller, Hermann J., and Jacobs-Muller, Jessie M. 1925. Genetics, 10:509-524.
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Triploid intersexes in Drosophila melanogaster. Bridges, Calvin. 1921. Science, 54:252-254.
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Twin hybrids of Oenothera hookeri T. and G.. Vries, Hugo de 1918. Genetics, 3:397-421.
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Variation due to change in the individual gene. Muller, Hermann J. 1922. The American Naturalist, 56:32-50.
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Vestiges of the Natural History of Creation. Anonymous. 1844. London: John Churchill.
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What are "factors" in Mendelian explanations? Morgan, Thomas H. 1909. American Breeders Association Reports, 5:365-369.
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What is a Gene? Demerec, Miroslav 1933. Journal of Heredity, 24:368-378.
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