in class evln NS_09_28POST

in class evln NS_09_28POST - ENVS 1500 Evolution by natural...

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I. Evolution by natural selection A. Empirical examples II. Video – What Darwin never saw ENVS 1500 – Evolution by natural selection Sept 28, 2015
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(D. Quammen 1996) Dough!
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Allele frequency Natural selection on phenotypes results in changes in allele frequency from generation to generation. Empirical examples:
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Fig 4.7 Changes in allele frequency: stablizing selection
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Raven et al. 2005
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Fig 4.7 Changes in allele frequency: directional selection
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Pepper moth
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Directional selection: change in age structure Atlantic Cod
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Fig 4.10 Age at maturation: Atlantic cod
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Fig 4.10
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