1) Why do males often compete for access to females more than females compete for access to males - PowerPoint PPT Presentation

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1) Why do males often compete for access to females more than females compete for access to males
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1) Why do males often compete for access to females more than females compete for access to males

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  1. 1) Why do males often compete for access to females more than females compete for access to males • A) males invest less in reproduction • B) access to females limits male reproduction, but not the reverse • C) both of the above

  2. 2) Fisherian runaway • A) means that selection favors faster running • B) depends on a genetic correlation between preference and trait genes • C) is a “good genes” explanation for why females have mating preferences • D) means that daughters express the same mating preferences as their brothers • E) applies only to birds

  3. 3) “good genes” • A) is shorthand for the selection on female mating preferences that result in attractive sons, but not higher viability • B) is the idea that male display traits reveal something about male genetic quality • C) has very little data to support it

  4. 4) Sexual selection in plants • A) makes basically the same predictions as in animals • B) predicts floral investment in displays is primarily repaid via export of pollen • C) depends upon animal pollinators, not wind pollinators • D) all of the above

  5. 5) Sperm competition • A) only occurs in species in which females mate with multiple males • B) favors infanticide • C) can favor traits such as large testis, large numbers of sperm, and modifications of male genitalia • D) all of the above • E) A and C above, but not B