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Gene Flow and Reduced Divergence
Grade Level
AP Biology
APB.368 Gene Flow and Reduced Divergence
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A sympatric insect population shows weak assortative mating by host plant, but adults from both host groups still mate often. Which prediction best explains how gene flow affects possible speciation?
A
Frequent interbreeding guarantees speciation because it increases mating between host groups.
B
Adults must stop moving for gene flow to occur within a shared area.
C
Weak assortative mating prevents any allele from being inherited by offspring.
D
Frequent interbreeding can break down genetic differences between host groups and make speciation less likely.
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