suppose that mice and humans differ by 30 substitutions in their globin genes, and rats and mice differ by five substitutions. on the basis of other evidence, we know that the ancestor to humans and mice lived 84 million years ago. assuming the molecular clock is operating, rats and mice split from each other million years ago.
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suppose that mice and humans differ by 30 substitutions in their globin genes, and rats and mice dif...
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