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In Fisher's model of sexual selection, a female preference for a male trait spreads together with the trait because their genetic bases become correlated. This can be interpreted as a “greenbeard” system: a preference gene, by inducing a female to mate with a trait‐bearing male, favors itself because the male is disproportionately likely also to carry the preference gene. Here, we use this logic to...
Extensive fitness variation for sexually antagonistic characters has been detected in nature. However, current population genetic theory suggests that sexual antagonism is unlikely to play a major role in the maintenance of variation. We present a two‐locus model of sexual antagonism that is capable of explaining greater fitness variance at equilibrium than previous single‐locus models. The second...
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