A zygote fails to undergo mitosis because of a mismatch in the number of chromosomes. This is an example of
A) hybrid sterility.
B) zygote mortality.
C) prezygotic isolation.
D) temporal isolation.
E) allopatric speciation. In this case, mating occurs but fails after the zygote dies due to the inability to complete mitosis. Thus, this is an example of zygote mortality.

Question

Quizplus · Accepted Answer

This scenario describes a failure of the zygote to survive and develop due to a mismatch in chromosome number between two individuals attempting to mate. This is an example of zygote mortality, where the zygote does not survive past the fertilization stage. Hybrid sterility refers to the offspring of two different species being infertile, while prezygotic isolation and temporal isolation are mechanisms that prevent mating from occurring in the first place. Allopatric speciation involves the divergence of populations due to geographic isolation.

A Zygote Fails to Undergo Mitosis Because of a Mismatch