Biology 1201A Lecture Notes - Lecture 3: Genetic Drift, Gamete, Elephant Seal

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Meiotic cost of sex parent only determines half the genetic makeup of their offspring. Implications of non-random mating on individual genotypes and population compositions: energy intensive and time intensive, open to predation when mating/ looking for mate, risk in pregnancy, constraints on fertility, timing of pregnancy/reproduction, stds/ stis not only humans. Increased probability of some offspring surviving/having favourable phenotypes: more likely to win if you buy diff tickets and with diff numbers on those tickets different phenotypic variation= more likely offspring will survive or have favourable phenotype. Might think that the fitness differs between male and female. = sexual selection: selection towards non-favourable phenotypes to attract mates. Within university: males* monopolize access to females ex. Control of a resource important to females. Secondary sex characteristics could be armour or sperm. Intersexual selection: one sex chooses their mate(s: one sex and the other sex (male against female, ex. Between different universities fe(cid:373)ales* (cid:272)hoose (cid:373)ate (cid:271)ased o(cid:374) (cid:858)displays(cid:859)

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