You observe two groups of freshwater fish that spawn at the same time of the year and in the same pond. After females lay their eggs on the pond bottom, males of both species attempt to fertilize them. After some investigation you realize that sperm from both species fertilize the eggs, but embryonic development stops shortly after fertilization when the eggs are fertilized by one species of males, but not by the other. This is an example of _____-zygotic reproductive isolation between the two species.
A)pre
B)post

Question

Quizplus · Accepted Answer

This is an example of post-zygotic reproductive isolation because fertilization occurs between the two species, but embryonic development stops shortly after.

You Observe Two Groups of Freshwater Fish That Spawn at the Same