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Primate SexualityComparative Studies of the Prosimians, Monkeys, Apes, and Humans$
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Alan F. Dixson

Print publication date: 2012

Print ISBN-13: 9780199544646

Published to Oxford Scholarship Online: May 2015

DOI: 10.1093/acprof:osobl/9780199544646.001.0001

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Sexual selection and genitalic evolution

Sexual selection and genitalic evolution

(p.334) Chapter 9 Sexual selection and genitalic evolution
Primate Sexuality

Alan F. Dixson

Oxford University Press

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

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