THE CYTOPLASMICALLY-INHERITED "SEX-RATIO" CONDITION IN NATURAL AND EXPERIMENTAL POPULATIONS OF DROSOPHILA BIFASCIATA
نویسندگان
چکیده
منابع مشابه
The cytoplasmically-inherited "sex-ratio" condition in natural and experimental populations of Drosophila bifasciata.
HE cytoplasmically-inherited “sex-ratio” condition (SR) has been analyzed by many workers. BUZZATI-TRAVERSO (1941) first reported “sex-ratio” females in Drosophila bilineata (=D. bijasciata) collected in natural populations in Italy. “Sex-ratio” females of the same species were found in Pavia, Italy (MAGNI 1953) and also in Asakawa, Japan (MORIWAKI and KITAGAWA 1954). Further examples of the “s...
متن کاملSex - ratio in natural populations of Drosophila mediopunctata ( Diptera : Drosophilidae
The sex-ratio trait has been described as the production of progenies with unequal sexual proportions induced by meiotic drive. In Drosophila, meiotic drive of the X chromosome against the Y (yielding female biased progenies) is known in several species, including in Drosophila mediopunctata. This species has been previously studied, and the chromosome mechanism of the meiotic drive in sex-rati...
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N previous communications (MALOGOLOWKIN and POULSON 1957; MALOGOI LOWKIN 1958) a cytoplasmically inherited sex-ratio condition has been described in Drosophila willistoni and in D. paulistorum. In both species, certain females produce progenies consisting mostly or only of daughters. This capacity for the production of unisexual broods is inherited by their entire female progenies and is not tr...
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Selfish genetic elements bias their own transmission to the next generation, even at the expense of the fitness of their carrier. Sex-ratio (SR) meiotic drive occurs when an X-chromosome causes Y-bearing sperm to die during male spermatogenesis, so that it is passed on to all of the male's offspring, which are all daughters. How SR is maintained as a stable polymorphism in the absence of geneti...
متن کاملAdaptation to experimental alterations of the operational sex ratio in populations of Drosophila melanogaster.
Theory predicts that males adapt to sperm competition by increasing their investment in testis mass to transfer larger ejaculates. Experimental and comparative data support this prediction. Nevertheless, the relative importance of sperm competition in testis size evolution remains elusive, because experiments vary only sperm competition whereas comparative approaches confound it with other vari...
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ژورنال
عنوان ژورنال: Genetics
سال: 1970
ISSN: 1943-2631
DOI: 10.1093/genetics/65.2.311