nonrandom mating {Ans: the avoidance of inbreeding in order to avoid the rare, harmful alleles in a population that become more frequent with inbreeding}founder effect {Ans: occurs when a small, random subset of a population goes and established a new population, which will be different due to the lack of variation}deleterious outcome of mutation {Ans: changes protein and causes a negative effect - most probable outcome}prezygotic barrier {Ans: occurs before fertilization and the production of a zygote... habitat isolation, behavioral isolation, temporal isolation, mechanical isolation, gametes incapable of fusion}parsimony {Ans: having the simplest form, the tree with the fewest changes, to combat homoplasy}advantageous outcome of mutation {Ans: changes the protein and ends up doing a better job than before, increased productivity, higher fitness}cladistic approach {Ans: clades inferred based on reconstruction of shared derived characteristics, cladograms}morphospecies concept {Ans: based on appearance, but very subjective, ex, two flies}emigration {Ans: leaving a population}behavioral isolation {Ans: behaviors separate two organisms ex, mating dances}stabilizing selection {Ans: trend in the bell curve representing the population that concentrates near the median}hybrid sterility {Ans: offspring reach maturity but are infertile or cannot attract a mate}genetic drift