Crossing over in the Sex Chromosome of Racial Hybrids of Drosophila Pseudoobscura.
نویسنده
چکیده
منابع مشابه
Salivary Gland Chromosomes in the Two Races of Drosophila Pseudoobscura.
The two races of Drosophila pseudoobscura, known as race A and race B, produce sterile male offspring when crossed (LANCEFIELD 1929), have visibly different shapes of the Y chromosomes (DOBZHANSKY and BOCHE 1933), and differ in their physiological characteristics (POULSON 1934, DOBZHANSKY 1935a, BOCHE unpublished). They appear, however, indistinguishable morphologically. LANCEFIELD (1929) and K...
متن کاملSegregation distortion in hybrids between the Bogota and USA subspecies of Drosophila pseudoobscura.
We show that, contrary to claims in the literature, "sterile" males resulting from the cross of the Bogota and USA subspecies of Drosophila pseudoobscura are weakly fertile. Surprisingly, these hybrid males produce almost all daughters when crossed to females of any genotype (pure Bogota, pure USA, hybrid F1). Several lines of evidence suggest that this sex ratio distortion is caused by sex chr...
متن کاملMolecular evolution of the Sex-Ratio inversion complex in Drosophila pseudoobscura: analysis of the Esterase-5 gene region.
The Sex-Ratio chromosome in Drosophila pseudoobscura is subject to meiotic drive. It is associated with a series of three nonoverlapping paracentric inversions on the right arm of the X chromosome. The esterase-5 gene region has been localized to section 23 within the subbasal inversion of the Sex-Ratio inversion complex, making esterase-5 a convenient locus for molecular evolutionary analyses ...
متن کاملThe Sex-Determining Mechanism of Drosophila Miranda.
SERIES of recent papers (DOBZHANSKY 1935; DOBZHANSKY and A TAN 1936; DOBZHANSKY 1937)) has described the unusual and interesting features which characterize the breeding behavior of Drosophila miranda and especially its method of sex determination. These papers have also reported the results of hybridization of miranda with the closely related and better known species, Drosophila pseudoobscura,...
متن کاملGenetics of male and female sterility in hybrids of Drosophila pseudoobscura and D. persimilis.
The genetic basis of male and female sterility in hybrids of Drosophila pseudoobscura-Drosophila persimilis was studied using backcross analysis. Previous studies indirectly assessed male fertility by measuring testis size; these studies concluded that male sterility results from an X chromosome-autosome imbalance. By directly scoring for the production of motile sperm, male sterility is shown ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Genetics
دوره 22 2 شماره
صفحات -
تاریخ انتشار 1937