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Intersexual selection: mate choice<br />

Females often mate preferentially with showy males<br />

Enlarged, ornamented traits; coloration; vocalization; other<br />

behavior.<br />

Showy male<br />

Drab female<br />

Like intrasexual selection, leads to evolution of sexual dimorphism<br />

Mate choice: female widowbirds prefer longer-tailed males<br />

Futuyma, Fig. 11.9<br />

14

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