Most recent common ancestor

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Reference no: EM133833701

Question

Two species, species A and species B, are estimated to have diverged from their most recent common ancestor 80 million years ago and differ by 40 mutations along one stretch of DNA.

based just on this information, draw a graph showing the predicted straight-line relationship between the number of mutations (y-axis) and the divergence time between two species (x-axis). You should assume that the species differed by 0 mutations when they first diverged (divergence time = 0 million years).

A third species, species C, was also sequenced, and it differed by 10 mutations from species A on the same stretch of DNA. When would you estimate that the most recent common ancestors of species A and species C lived?

Reference no: EM133833701

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