Which is not a postzygotic isolation mechanism?
A) Abnormal meiosis following fertilization
B) Infertile hybrids
C) Reduced viability of hybrids
D) Abnormal mitosis following fertilization
E) Variation in mating pheromones

Question

Quizplus · Accepted Answer

Variation in mating pheromones is a prezygotic isolation mechanism, as it prevents successful mating and fertilization from occurring. The other choices (abnormal meiosis, infertility, reduced viability, and abnormal mitosis) are all postzygotic isolation mechanisms, as they occur after fertilization has already taken place.

Which Is Not a Postzygotic Isolation Mechanism