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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.

Related tags

Gene-FlowSpeciationReproductive-IsolationEvolutionEvolution And SpeciationHeredity And EvolutionScienceClass 10 Mcq

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