ANT-1430 Lecture Notes - Lecture 3: Genetic Drift, Selective Breeding, Sexual Selection
Document Summary
Anthropology lecture 3 how does the process of evolution work. There is an emergence of new species. Normally small scale changes in a short time period. The differential survival and reproduction of organisms with particular heritable genotypes ex darwin"s finches. There is a genetic component to phenotypic variation. Example of natural selection: peppered moths: in surrounded area. Sexual selection moths adapted to the color of tress. A struggle between the individuals of one sex generally the males, for the possession of the other sex. Can explain the existence of traits that have no clear bearing on helping an organism survive. Favors the ability of one sex to compete directly with one another for access to mates. Favors traits in one sex that attract the other. And even then, needs help (other forces of evolution) African american populations average 80% contribution from west. Jewish populations more similar to local non-jewish populations than to other jewish populations.
