Two species of frogs belonging to the same genus occasionally mate, but the offspring fail to develop and hatch. What is the mechanism for keeping the two frog species separate?

Question

Quizplus · Accepted Answer

The postzygotic barrier of hybrid inviability prevents the offspring produced by the two frog species from developing and hatching, keeping the species separate. Hybrid breakdown refers to the reduced viability or fertility of the offspring of successive generations of hybrids. Hybrid sterility is a prezygotic barrier that prevents the fertilization of gametes from different species. Gametic isolation is also a prezygotic barrier that prevents fertilization due to differences in gametes. Adaptation is not relevant to the question.

Two Species of Frogs Belonging to the Same Genus Occasionally