Chapter 2: Evolutionary Psychology

behavior

response to stimuli

fitness

driving force of evolution and behavior

adaptation

biological trait that has specific function that helps for reproduction

trait

heritable dispositional characteristic

mutation

permanent change in genes

adaptations occur in favor of:

fight, flight, feeding, and reproduction

inclusive fitness

how one’s genetic success can be influenced by their cooperation and altruistic behaviors

direct fitness

fitness from personal reproduction

indirect fitness

fitness from relatives (helps your family’s genes)

altruism

an individual sacrifices something for someone else

reciprocal altruism

mutualistic benefit increases both individuals’ fitness

hamilton’s rule

rB>C

is reproduction or survival favored?

reproduction

natural selection

differential survival and reproduction, resulting in heritable differences

3 requirements of natural selection

variation, heritability, and differential reproduction