BIOL 3040 Chapter : EvolutionCh1718
Document Summary
Good genes, offspring health, and survival: darwin thought of sexual selection based on interactions w/ individuals of. Sexual selection: selection generated by differential access to opposite-sex gametes (or mates) Intersexual selection: individuals of one sex select among individuals of the other sex as mates. Intrasexual selection: members of one sex, most often males, compete w/ each other for mating access to the other sex. Polygyny 1 male, more than 1 female. Polyandry 1 female, more than 1 male. Polygynandry more than 1 male, more than 1 female. Anisogamy difference in the size of the gametes that forms the basis of the. In species w/ internal gestation, females are usually the only sex to devote energy to offspring before they are born. Lots of males that produce few males. Few males that produce lots of offspring. Not many females that produce a whole lot, but very few that produce none most females produce an intermediate number of offspring.
