Biology 1001A Lecture Notes - Lecture 16: Kin Selection, Selfishness, Inclusive Fitness
Document Summary
Individuals often appear to sacrifice their survival or reproduction for the good of others. In nature selection, the fitness of recipient does not matter, what is matter is how the actions affects the actors. Cooperation and selfishness are easy to reconcile with selection. Cooperation are within both members in one species benefits. Mutualism are within two members in different species benefits. Spiteful and altruism behavior are selected strongly against by natural selection, because they will have no fitness at all, they reduce the fitness of the actor. Fitness in an individual reproduce its own offspring is called direct fitness where he pass on his/her own alleles to the offspring. Fitness in which an individual mum"s relatives is alive without your help called indirect fitness, helping relative increase fitness because they also share some of the alleles in your body. Direct fitness with indirect fitness equal inclusive fitness.
