Natural selection for traits that keep distinct populations from reproducing with each other is called reinforcement.When is reinforcement beneficial?
A)when the environment is changing
B)when hybrids have lower fitness than either parent population
C)when prezygotic isolating mechanisms are in place
D)when gene flow is low
E)Reinforcement is beneficial under all of the above conditions.

Question

Quizplus · Accepted Answer

Reinforcement is beneficial when hybrids have lower fitness than either parent population because this will help prevent the merging of the populations and maintain their genetic distinctiveness. In this case, natural selection is promoting the evolution of traits that reduce the likelihood of hybridization and promote reproductive isolation. The other options may play a role in reinforcement, but they are not the primary factor determining its benefits.

Natural Selection for Traits That Keep Distinct Populations from Reproducing