Question

imagine a population of moths. some black moths move into and start mating with a population of white moths. this increases the frequency of genes for black coloration in the white moths population.
which evolutionary process does this scenario describe?
mutation
natural selection
migration
genetic drift

Explanation:

• Mutation: Involves a change in the DNA sequence. There is no mention of a new mutation occurring in the moths' DNA in the scenario.
• Natural selection: Relies on differential survival and reproduction based on traits. The scenario does not describe moths being selected for or against due to their color in a particular environment.
• Migration (gene flow): Occurs when individuals move into or out of a population and transfer genes. Here, black moths move into the white - moth population and increase the frequency of black - color genes, which is an example of gene flow through migration.
• Genetic drift: Is a random change in allele frequencies, often due to chance events like a small population size. The described event is not a random, chance - based change but a result of movement of individuals (migration).

Answer:

migration