Question

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?
a) hybrid inviability,
b) hybrid breakdown,
c) hybrid sterility,
d) gametic isolation,
e) adaptation

Answer 1

Answer:

a) hybrid inviability

Explanation:

Two species of frogs belong to the same genus and interbreed sometimes. It means that the prezygotic reproductive barriers are not working here since the frogs of two species are able to interbreed and produce a zygote. However, the resultant offspring are less viable and do not hatch. It represents hybrid inviability wherein the hybrids of two species do not develop properly during embryonic development and die soon. It is a type of postzygotic reproductive barrier.