BIOL 409 Lecture Notes - Lecture 8: Cane Toad, Reciprocal Altruism, Selfishness
Document Summary
Behavior: internally generated response to external stimulus and is capable of evolving through natural selection, if: Unrelated adults ani work cooperatively to incubate eggs, feed young, and protect young from predators by. Cane toad tadpoles will cannibalize cane toad eggs. Belding ground squirrels sound alarm calls when they notice a predator. Colonies of bacteria use bacteriocins to kill one another. Inclusive fitness and kin selection: because close relatives share your genes, selection can sometimes favor traits/behaviors that are beneficial to kin. In diploids, relatedness decreases by in each pedigree step. Inbreeding coefficient (f): the probability that homologous alleles present in the same individual are identical by descent. Is the more accepted theory to explain evolution of altruism. They are given the chance to rat out the other for a smaller sentence: spite has evolved when r=1, and is favored when benefits are more likely to g to kin gets rids of competition.
