BIO SCI 94 Lecture Notes - Lecture 21: Logistic Function, Genetic Drift, Inbreeding Depression

• School: UC-Irvine
• Department: Biological Sciences
• Course: BIO SCI 94
• Professor: Robin Bush

Document Summary

Explain why animals behave altruistically a fitness benefit to the recipient. Altruism= a behavior that has a fitness cost to the individual exhibiting the behavior and. Kin selection = a theory that proposes that natural selection acts through benefits. Direct fitness is derived from an individual"s own offspring. Indirect fitness is derived from helping relatives produce more offspring than they could produce on their own. Combination of direct and indirect fitness components is called inclusive fitness. When doing so increases your fitness (direct or. Altruism = a behavior that has a fitness cost to the individual exhibiting the behavior and indirect) a fitness benefit to the recipient. Example : you run out into traffic to save an unrelated stranger. Hypothesis : reciprocal altruism is an exchange of fitness benefits that are separated in time- you can help someone else if you have the expectation that you will be similarly helped in the future.