Which of the following is a prezygotic isolating mechanism?
A) Hybrid infertility
B) Low hybrid adult viability
C) Low hybrid zone viability
D) Hybrid zones
E) Incompatibility between gametes

Question

Quizplus · Accepted Answer

Prezygotic isolating mechanisms prevent the formation of a viable zygote before mating or fertilization occurs. Incompatibility between gametes is an example of a prezygotic isolating mechanism because it physically prevents the sperm of one species from fertilizing the egg of another species. Hybrid infertility and low hybrid viability are examples of postzygotic isolating mechanisms because they occur after the formation of the zygote. Hybrid zones are regions where two different populations interbreed, but they are not a mechanism of reproductive isolation themselves. Low hybrid zone viability is another example of a postzygotic isolating mechanism.

Which of the Following Is a Prezygotic Isolating Mechanism