Social Selection

Social Selection - Evolution of Sex, Gender and Sexuality...

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Unformatted text preview: Evolution of Sex, Gender and Sexuality Joan Roughgarden Dept. of Biological Sciences, Stanford University Darwins Sexual Selection (1871) Males of almost all animals have stronger passions than females. The female... with the rarest of exceptions is less eager than the male... she is coy. Females choose mates who are more attractive... vigorous and well-armed just as man can give beauty... to his male poultry. Todays Central Narrative We now understand Males, who can produce many offspring with only minimal investment, spread their genes most effectively by mating promiscuously Female reproductive output is far more constrained by the metabolic costs of producing eggs or offspring, and thus a females interests are served more by mate quality than by mate quantity. (Coyne, 2004) h 2 ( -badge-size)=0.38 0.03 h 2 ( -fitness)=0.03 0.01 r(-badge-size-to-fitness)=0.15 0.01 h 2 (-fitness)=0.04 0.01 h 2 (-choice-of-badge-size)=0.03 0.01(-choice-of-badge-size)=0....
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This note was uploaded on 11/08/2009 for the course HUMBIO 2A taught by Professor Boggs,c;durham,w during the Spring '08 term at Stanford.

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Social Selection - Evolution of Sex, Gender and Sexuality...

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