Question: A gene is calculated to be evolving at a rate of 10 nucleotide differences per million years. Two species have 20 nucleotide differences between them.

A gene is calculated to be evolving at a rate of 10 nucleotide differences per million years. Two species have 20 nucleotide differences between them. Under the molecular clock hypothesis, how long ago would you expect the species to have split from a common ancestor?


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