If two separated populations start interbreeding again, what may happen to speciation?
Answer and explanation
Correct answer: Increased gene flow may reduce separation
Speciation generally requires restricted gene flow and the accumulation of differences between populations. When separated groups interbreed again, alleles move between them, increasing gene flow. This mixing can reduce genetic divergence and weaken reproductive separation, so speciation may slow or be prevented. It does not guarantee immediate completion, destroy genes, or strengthen geographical isolation; therefore option A is correct.
Frequently asked questions
What is the correct answer to this question?
Increased gene flow may reduce separation
Why is this the correct answer?
Speciation generally requires restricted gene flow and the accumulation of differences between populations. When separated groups interbreed again, alleles move between them, increasing gene flow. This mixing can reduce genetic divergence and weaken reproductive separation, so speciation may slow or be prevented. It does not guarantee immediate completion, destroy genes, or strengthen geographical isolation; therefore option A is correct.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Heredity and Evolution. Topic: Evolution and speciation.
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