Sexy Son Hypothesis - Sperm Models

Sperm Models

‘‘Good-sperm’’ models predict positive genetic associations between a male’s sperm competitiveness and the general viability of his offspring, whereas ‘‘sexy-sperm’’ models predict that multiple mating females produce sons successful in sperm competition, and daughters that incite sperm competition through multiple mating. As with precopulatory processes, postcopulatory models predict that the trait in males that determines fertilization success will become genetically coupled with the mechanism by which females bias sperm use toward preferred males.