The Theory of the GeneYale University Press, 1926 - 343 pages |
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Common terms and phrases
14 chromosomes Abst.-Vererb allelomorph appear autosomes back-crossed Biol bivalents Blakeslee carried chro chromo chromosome groups chromosome numbers color conjugate contain cross crossing-over cytological Datura daughter develop dioecious diploid dominant double Drosophila melanogaster effect embryo Emmer Emmer group eyeless F₁ factors fertilized flies gametophyte gemini germ-cells give half haploid haploid number haplonts heredity hybrid Ibid individual interpretation intersexes Jour kinds linkage male and female mated maturation division mosomes moths mutant mutant types normal nucleus number of chromosomes Oenothera offspring organs ovary pair of chromosomes parent parthenogenetic plants polar body pole pollen grains pollen mother cells polyploid present Proc produced protonema race ratio recessive genes relation set of chromosomes sex-determination sex-linked sex-linked inheritance shown single chromosomes species sperm sperm-cells sporophyte stage studied sylvestris Tabacum takes place teosinte tetraploid theory tion triploid trisomic white eyes wild type wings X-chromosomes Zoöl
Popular passages
Page xv - The theory states that the characters of the indi- \ vidual are referable to paired elements (genes) in the germinal material that are held together in a definite / number of linkage groups; it states that the members of each pair of genes separate when the germ-cells mature in accordance with Mendel's first law, and in consequence each germ-cell...
Page v - IN the year 1883 ,a legacy of eighty thousand dollars was left to the President and Fellows of Yale College in the city of New Haven, to be held in trust, as a gift from her children, in memory of their beloved and honored mother Mrs. Hepsa Ely Silliman. On this foundation Yale College was requested and directed to establish an annual course of lectures designed to illustrate the presence and providence, the wisdom and goodness of God, as manifested in the natural and moral world. These were to be...
Page ii - PUBLISHED BY YALE UNIVERSITY PRESS ELECTRICITY AND MATTER. By JOSEPH JOHN THOMSON, D.Sc., LL.D., PH.D., FRS, Fellow of Trinity College and Cavendish Professor of Experimental Physics, Cambridge University. (Fourth printing.) THE INT'EGRATIVE ACTION OF THE NERVOUS SYSTEM.
Page ii - ... of Stimuli in Living Substances. By MAX VERWORN, MD, PH.D., Professor at Bonn Physiological Institute. (Second printing.) PROBLEMS OF AMERICAN GEOLOGY. By WILLIAM NORTH RICE, FRANK D. ADAMS, ARTHUR P. COLEMAN, CHARLES D. WALCOTT, WALDEMAR LINDGREN, FREDERICK LESLIE RANSOME, AND WILLIAM D. MATTHEW. (Second printing.) THE PROBLEM OF VOLCANISM. By JOSEPH PAXSON IDDINGS, PH.B., SC.D. (Second printing.) ORGANISM AND ENVIRONMENT AS ILLUSTRATED BY THE PHYSIOLOGY OF BREATHING. By JOHN SCOTT HALDANE,...
Page xv - Mendel's first law, and in consequence each germ-cell comes to contain one set only; it states that the members belonging to different linkage groups assort independently in accordance with Mendel's second law; it states that an orderly interchange — crossing-over — also takes place, at times, between the elements in corresponding linkage groups; and it states that the frequency of crossing-over furnishes evidence of the linear order of the elements in each linkage group and of the relative position...
Page xvi - Between the characters, that furnish the data for the theory and the postulated genes, to which the characters are referred, lies the whole field of embryonic development. The theory of the gene, as here formulated, states nothing with respect to the way in which the genes are connected with the end-product or character. The absence of information relating to this interval does not mean that the process of embryonic development is not of interest for genetics . . . but the fact remains that the sorting...
Page 42 - The properties of the organism are made up of units sharply distinguishable from one another. These units are bound up in groups and, in related species, the same units and groups of units recur. Transitions, such as are seen in the outer forms of animals and plants, no more exist between the units than between the molecules of the chemist. 'Species are not continuously connected but arise through sudden changes or steps. Each new unit added to those already present forms a step and separates the...
Page ii - THE INTESTINAL FLORA WITH SPECIAL REFERENCE TO THE IMPLANTATION OF BACILLUS ACIDOPHILUS. By LEO F. RETTGER, Professor of Bacteriology, Yale University, and HARRY A. CHEPLIN, Seessel Fellow in Bacteriology, Yale University. THE EVOLUTION OF MODERN MEDICINE. By SIR WILLIAM OSLER, BART., MD, FRS (Third printing.) RESPIRATION. By JS HALDANE, MA, MD, FRS, HON. LL.D.
Page v - THE SILLIMAN FOUNDATION IN the year 1883 a legacy of eighty thousand dollars was left to the President and Fellows of Yale College in the city of New Haven, to be held in trust, as a gift from her children, in memory of their beloved and honored mother, Mrs. Hepsa Ely Silliman.
Page 255 - Mendel's theory of heredity postulates that the gene is stable. It assumes that the gene that each parent contributes to the hybrid remains intact in its new environment in the hybrid.. . . If a black guinea pig is bred to a white one, the offspring are black. If these are inbred, the offspring are three blacks to one white. The extracted whites breed as true as the original race of whites. The white gene has not been contaminated by the black gene in their sojourn together in the...