Question

most populations on earth are affected by several factors, such as genetic drift, mutations, and natural selection. which statement can be made about a population that experiences changes in gene frequencies?
the hardy-weinberg equilibrium is maintained.
mutations will not affect the population.
lethal genes will eventually be expressed.
evolution is occurring in the population.

Explanation:

When a population experiences changes in gene frequencies, it means that the genetic composition of the population is altering. In the context of evolutionary biology, this is a key indicator of evolution. The Hardy - Weinberg equilibrium assumes no evolution (no changes in gene frequencies). Lethal genes may or may not be expressed depending on factors like dominance. Mutations can introduce new alleles and thus affect the population's gene pool.

Answer:

Evolution is occurring in the population.