Chapter

Sexual selection and genitalic evolution

Alan F. Dixson

in Primate Sexuality

Second edition

Published in print January 2012 | ISBN: 9780199544646
Published online May 2015 | e-ISBN: 9780191810022 | DOI: https://dx.doi.org/10.1093/acprof:osobl/9780199544646.003.0009
Sexual selection and genitalic evolution

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This chapter discusses the sexual selection and the evolution of male and female genitalia. It gives an overview of the four hypotheses regarding the evolution of male genitalia. These hypotheses are the lock-and-key, the genitalic recognition, the pleiotropism and the mechanical conflict of interest. It also examines Eberhard's theory in relation to the effects of sexual selection via cryptic female choice on the evolution of penile morphology. Eberhard states that when females mate with a number of partners, rather than with a single male, the penis serves as an internal courtship device, for a successful sperm transport and fertilization. The chapter also presents observations on vagina, cervix, uterus, uterotubal junction and fallopian tubes to explain the evolution of female genitalia.

Keywords: sexual selection; genetalic evolution; internal courtship device; vagina; cervix; uterus; uterotubal junction; fallopian tubes

Chapter.  23272 words.  Illustrated.

Subjects: Zoology and Animal Sciences ; Evolutionary Biology

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