ch. 9 quiz Flashcards
the benefits of sexual reproduction include
purging mutations
the red queen hypothesis states that
sexual reproduction can increase resistance to parasites
given that self-fertilization can lead to inbreeding depression, when should a hermaphrodite use self fertilization?
when population density is low
why does the less common sex in a population have higher fitness?
members contribute more genes on average per offspring
which does local mate competition favor?
a female-biased offspring ratio
(males are competing for females; males can mate w/ many females, but females can only have 1 child at a time)
when might environmental sex determination be an adaptive strategy?
when offspring of each gender can survive better in different conditions
which mating system is favored when the males can make important contributions to raising the offspring?
monogamy
extra pair copulation has favored the development of
mate guarding
why might exaggerated secondary sexual characteristics in males demonstrate a superior genotypes to females?
they often reduce fitness, which signifies a better genotype for survival (the handicap principle)
