Which of the following statements accurately describe sexual selection and inbreeding?

Question

A. Sexual selection alters allele frequences, while inbreeding does not affect allele frequencies.

B. Sexual selection invovles non-random selection of a mate, while inbreeding involves random mate selection.

C. Both sexual selection and inbreeding only occur in small population sizes.

D. Sexual selection alters the frequency of alleles involved only in mating while inbreeding alters the allele frequencies of survival-related traits.

Answer 1

A. Sexual selection alters allele frequencies, while inbreeding does not affect allele frequencies.

Sexual selection will affect microevolution in populations while inbreeding will only increase the relative proportion of homozygous traits, however in the long run the deleterious effects will be selected out.

Answer 2

A. The reason is because allele frequencies show the genetic diversity of a species populations. In most contexts, sexual selection occurs in large populations, resulting in a larger number of allele frequencies. The opposite is true for inbreeding: a smaller population has a smaller number of allele frequencies.

B is not correct because sexual selection is random mating and inbreeding is non-random mating.

C is not correct because sexual selection is not possible in small population sized.

D is not correct because sexual selection alters the alleles that increase survival.