Random Mating in Two Species of Drosophila

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Abstract
Data are presented which show a high frequency (40-100%) of repeated mating by female D. athabasca, Eastern A. No deviations from random mating, either as disproportionate representation of male genotypes in the mating population or as deviations from random choice of mates by members of the mating population, were evident in any D. athabasca or D. melanogaster population sampled. The data do not rule out the possibility of frequency dependent mate selection in a nonequilibrium population. Comparisons of the magnitudes of deviations from random mating reported in the literature were made with the magnitude of the deviations detected with the genetic system and sample sizes. Deviations from random mating might have been found had they occurred to the same degree as previously detected.