Книга: Bridges Calvin Blackman «The third-chromosome group of mutant characters of Drosophila melanogaster»

The third-chromosome group of mutant characters of Drosophila melanogaster

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Книга представляет собой репринтное издание. Несмотря на то, что была проведена серьезная работа по восстановлению первоначального качества издания, на некоторых страницах могут обнаружиться небольшие "огрехи" :помарки, кляксы и т. п.

Издательство: "Книга по Требованию" (2011)

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Bridges, Calvin Blackman

born Jan. 11, 1889, Schuyler Falls, N.Y., U.S.
died Dec. 27, 1938, Los Angeles, Calif.

U.S. geneticist.

He entered Columbia University in 1909 and assisted Thomas Hunt Morgan in designing experiments using Drosophila that showed that variations in the insect could be traced to observable changes in its genes. These experiments led to the construction of gene maps and proved the chromosome theory of heredity. In 1928 Bridges and Morgan moved to California Institute of Technology, where Bridges continued gene mapping and later discovered an important class of drosophila mutants caused by gene duplications.

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▪ American geneticist
born Jan. 11, 1889, Schuyler Falls, N.Y., U.S.
died Dec. 27, 1938, Los Angeles, Calif.

      American geneticist who helped establish the chromosomal basis of heredity and sex.

      The year after he entered Columbia University (1909), Bridges obtained a position there as laboratory assistant to the geneticist Thomas Hunt Morgan (Morgan, Thomas Hunt). He and Morgan designed experiments using the fruit fly, Drosophila melanogaster (vinegar fly), which showed that heritable variations in the insect could be traced to observable changes in its chromosomes. These experiments led to the construction of “gene maps” and proved the chromosome theory of heredity. Bridges, with Morgan and Alfred Henry Sturtevant, published these results in 1925. That same year he published “Sex in Relation to Chromosomes and Genes,” demonstrating that sex in Drosophila is not determined simply by the “sex chromosomes” (X and Y) but is the result of a “chromosomal balance”—a mathematical ratio of the number of female sex chromosomes (X) to the number of “nonsex” chromosomes (autosomes).

      In 1928 Bridges moved with Morgan to the California Institute of Technology, Pasadena, where he constructed detailed gene maps of the giant chromosomes found in the salivary gland cells of the fruit fly larva. Later he discovered an important class of Drosophila mutants caused by gene duplications.

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Источник: Bridges, Calvin Blackman

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Bridges Calvin BlackmanThe third-chromosome group of mutant characters of Drosophila melanogasterКнига представляет собой репринтное издание. Несмотря на то, что была проведена серьезная работа по… — Книга по Требованию, - Подробнее...2011
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