Question

Gene flow: a. decreases divergence between populations b. increases divergence between populations c. limit adaptation in some populations d. a and c are correct e. b and c are correct

1) decreases divergence between populations
2) increases divergence between populations
3) limit adaptation in some populations
4) a and c are correct
5) b and c are correct

Answer 1

Gene flow decreases divergence between populations by making their gene pools more similar and can also limit a population's adaptation to local environments by introducing new alleles.Option 4 is the correct answer.

Step-by-step explanation:

Gene flow is an important evolutionary force, involving the transfer of alleles between populations through migration of individuals or gametes. It introduces new genetic variation, which is crucial for the adaptability and survival of a species. When there is sufficient gene flow between populations, it decreases divergence among them, because it makes the gene pools of the separate populations more similar. This contrasts with restricted gene flow, which can lead to greater divergence, and potentially lead to speciation. Thus, gene flow limits adaptation within a population to its local environmental conditions by continuously introducing new alleles from other populations.

Therefore, the correct answers, in the context of how gene flow affects populations, are that it:

1. Decreases divergence between populations.
2. Limits adaptation in some populations.

So, the correct answer choice to the student's question is option 4) 'a and c are correct'.