Beckenbach, AT,
American Naturalist,
137:340-343.
1991.
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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