Question

question 9 of 10
how does reducing gene flow cause speciation?
a. it allows populations to become genetically different.
b. it creates patches of favorable habitat.
c. it increases gene flow.
d. it increases fossilization.

Explanation:

When gene flow is reduced, populations are less likely to exchange genetic material. Over time, this lack of genetic exchange can lead to genetic divergence. Each population may accumulate different mutations, and natural selection may act differently on them. Eventually, these genetic differences can become significant enough that the populations can no longer interbreed successfully, leading to speciation. Option B is incorrect as creating patches of favorable habitat is more related to ecological factors rather than the direct genetic mechanism of speciation due to reduced gene flow. Option C is wrong because the question is about reducing gene flow, not increasing it. Option D is incorrect as fossilization is about the preservation of remains and not related to the process of speciation caused by reduced gene flow.

Answer:

A. It allows populations to become genetically different.