BIO152H5 Lecture Notes - Lecture 18: Red Queen Hypothesis, Gender Role, Anisogamy

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20 Dec 2012
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These questions will help you to make the connection between what you read in your text book and see in the film. We are living in a complex world full of parasites, bacteria, etc all evolving. Thus males aren"t that choosy about who they combine with because they produce a lot of sperm. Male and female roles are not set in stone: they"re determined by which sex competes for mates and which sex nurturs their young. In the film, dr marion petrie demonstrated that peahens preferred to mate with peacocks with long flashy tails. In the other part of the experiment she paired females with males of varied tail lengths. Peacocks: tail lengths of peacocks were measured and pea-hens chose males that contained longer tails. In the sweaty t-shirt" experiment, overall women preferred the scent of t-shirts worn by men who"s mhc genes were different from their own. Discuss how this kind of preference might offer a selective advantage.

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