Question

In Wisconsin, a very large population of lake trout, in which individuals mate at random, experiences no migration, mutations, nor selective pressure for a number of years. Which of these is most likely to occur in the population?
The frequency of dominant alleles will slowly increase.
The gene pool of the population will remain relatively constant.
The genetic variability of the population will slowly decrease.
The frequency of dominant and recessive alleles will equalize.

Answer 1

The gene pool of the population will remain relatively constant.

Explanation: With a very large population, random mating, and no migration, mutation, or selection, the population meets Hardy–Weinberg conditions, so allele and genotype frequencies stay constant over generations (no evolutionary change).