Sex-Ratio Polymorphism in Drosophila pseudoobscura

Name: Sex-Ratio Polymorphism in Drosophila pseudoobscura
Creator: Andrew T. Beckenbach
Keywords: 5. Gender equality, 10. No inequality, 3. Good health

descriptionPublicationkeyboard_double_arrow_right Article 01 Mar 1991 English Publisher:University of Chicago PressJournal:The American Naturalist, volume 137, pages 340-343 (issn: 0003-0147, eissn: 1537-5323,

Authors: Andrew T. Beckenbach;

doi: 10.1086/285166

Sex-Ratio Polymorphism in Drosophila pseudoobscura

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Abstract

I studied "sex-ratio" (SR) genotype frequencies in two populations of Drosophila pseudoobscura from southeastern Arizona: Bear Creek Canyon and Tucson. Wild-inseminated females were collected, their fecundities measured in the laboratory, and their SR genotypes inferred by cytological analysis of their progenies. A statistically significant fecundity deficiency was observed among SR/SR females from Bear Creek Canyon. The SR frequency in the Tucson population increased at a rate consistent with the operation of meiotic drive unopposed by selection.

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