Biology 3466B Study Guide - Frequency-Dependent Selection, Selfishness
9 Nov 2012
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Kin selection ch 6 205-207 ch 12 447-453 467-477. Know when to apply the terms kin selection and indirect fitness. Predict conditions favoring altruism among kin and non-kin. Explain causes and outcomes of parent-offspring conflict. W. d hamilton (1964): showed the conditions favoring selection for an allele that causes altruistic behavior. Defined as the probability that homologous alleles in two individuals are identical by descent. Note: this differs from f, the coefficient of inbreeding, which is the probability that homologous alleles in the same individual are identical by descent. In terms of fitness an interaction between individuals has 4 possible outcomes: Cooperation (mutualism) - actions that result in fitness gains for both participants. Altruism individual instigating the action pays a fitness cost and the individual receiving benefits (sacrifice on behalf of another) Selfishness the actor gains and the recipient loses. Spite behavior that results in fitness losses for both participants (rare in nature, because it would be eliminated by natural selection)
