Question

Consider a hypothetical locus with two segregating alleles (A and B). Population size is small, mutation is absent, and neither of the two alleles has a selective advantage. After a long period of time (many generations), what will occur?a) The population will eventually become monomorphic for one of the two alleles.b) Allele frequencies will cycle over time.c) Balancing selection will maintain both alleles.d) Allele frequencies will change over time, but both alleles will remain.e) Allele frequencies will remain constant.

Answer 1

The preferable option will be - A.

A. The population will eventually become monomorphic for one of the two alleles.

Explanation:

The population will eventually become monomorphic for one of the two alleles because -

• Here mutation is absent.

• No other allele is allowed to get involved here.

• The population size is small.

• As allele A and B are fixed for that population after many generations the population will become monomorphic for that two alleles.