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Sympatric Speciation
Grade Level
AP Biology
APB.407 Sympatric Speciation
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Two insect forms in one field still exchange genes at a measurable rate. A student says this proves sympatric speciation cannot be underway. Which response is most accurate?
A
Any amount of gene flow proves the forms are fully random mating forever.
B
Speciation can be in progress if gene flow is reduced by assortative mating and hybrids have lower fitness.
C
Sympatric speciation requires a complete physical barrier before gene flow can decline.
D
Reduced hybrid fitness is irrelevant if the forms occupy the same field.
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