Which of the following conditions is most likely to reinforce isolating mechanisms between two species that occasionally hybridize?
A) the environment is changing
B) hybrids have lower fitness than either parent population
C) prezygotic isolating mechanisms are in place
D) gene flow is low

Question

Quizplus · Accepted Answer

Hybrids with lower fitness than either parent population are less likely to survive and reproduce, reinforcing the reproductive barriers between the two species and preventing the blending of the species through hybridization. This process is known as reinforcement, where natural selection increases reproductive isolation.

Which of the Following Conditions Is Most Likely to Reinforce