Sexual selection and the comparative anatomy of reproduction in monkeys, apes, and human beings
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Updated: Sep 26, 2026

Assessing Differences in Sperm Competitive Ability in Drosophila
Published on: August 22, 2013
1Center for Reproduction of Endangered Species Zoological Society of San Diego, CA 92112-0551, USA. adixson@sandiegozoo.org
Abstract:
Sexual selection has had profound effects at the copulatory and postcopulatory levels, upon the evolution of reproductive anatomy, physiology, and patterns of mating behavior. This review deals with the effects of sexual selection upon the evolution of relative testes sizes, sperm morphology, seminal vesicular function, penile morphology, and copulatory behavior in the Order Primates. The concept of cryptic female choice is also discussed, and its potential value in understanding how co-evolution of genital morphologies may have occurred in primates and inother animals.
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