ANTH 4040 : ANTH 4040 TEST 1 STUDY GUIDE Main Points
Document Summary
Bbb: natural selection, 3 types of natural selection & their effects on variability within a population, stabilizing selection, directional selection, diversifying selection, units of natural selection, gene, individual organism: classic darwinian theory, group (i. e. population, species. * for a unit to be subject to. Natural selection the trait must be inheritable & there must be variation in that unit: kin selection, individual may reduce his/her reproductive success by aiding the reproductive success of his/her kin (e. g. altruism) Relationships between speciation & morphological change: definitions, sibling species- different species that are virtually morphologically identical, heterochrony- is a change in growth pattern involving the rate, onset, & duration. The mutated gene may become an (dis)advantageous or neutral variant, or dysfunctional (i. e. pseudogene). Stability of polymorphism is based on stability of natural selective pressures. Change in selective pressures will lead to change in allelic frequencies: genetic drift, polymorphism is more transient phenomenon.
