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Articles on Genital appearance

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A male African jacana bird mounts a female, but who takes the lead in caring for the young?. Shutterstock/Dave Montreuil

Wild sex: when sex roles get reversed, some females develop a ‘penis’

Sex roles in nature don’t always follow the same script. In fact, some females have genitals that resemble a penis. How can this be? Evolution has the answers.

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