BIO120H1 Chapter Notes - Chapter 6: Pipefish, Anaphrodisiac, Wiman Of Gojoseon

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12 Jun 2012
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BIO120H1 Full Course Notes
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BIO120H1 Full Course Notes
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Coyne chapter 6 how sex drives evolution for lec 6 and 7. These unique traits and behaviours are only seen in one sex. These examples shows us that just as darwin thought these traits do reduce survival. Another example would be the footlong lizard where the males and females look different meaning the males are bright colours having yellow head while the females were grayish colour and lightly spotted. An experiment was done to test a hypothesis to see that the males bright colours attracts more predators and after the experiment the male models showed bite marks by birds and snakes while none were on the female models. Before darwin sexual dimorphism was a mystery that not even creationist could explain how one sex should produce features that are harmful for their survival. Darwin was the first to recognize this trade off and said that this type of selection responsible for sexually dimorphic features are called sexual selection.

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