lecture04-slides - E v o lu tio n o f B e h a v io r I: C a...

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Evolution of Behavior I: Causes of Behavioral Variation http://courses.cit.cornell.edu/bionb2210/index.html Username: student Password: darwin What is a behavior? Any observable action or response of an organism Behavior = genotype + environment Behavioral variation = genetic variation + environmental variation Only if behavioral variation is at least partly genetic, can it evolve Evolution WILL occur if: 1. Individuals within populations vary 2. The variations among individuals are, at least in part, passed on from parents to offspring 3. In every generation, some individuals are more successful at surviving and reproducing than others 4. The survival and reproduction of individuals are not random but tied to the variation among individuals = Natural Selection Evolution is a change in allele (gene) frequencies
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Characterizing Behavioral Variation Behavioral Variation genetic variation environmental variation Phenotype : characteristic of an organism (e.g. a behavior) Characterizing Variation
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lecture04-slides - E v o lu tio n o f B e h a v io r I: C a...

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