Question

A molecule that can be used as a molecular clock has a neutral mutation rate of one mutation per 10 million years. How many years ago did two species share a common ancestor if the molecules found in these two species differ by a total of six mutations?
6 million years
30 million years
10 million years
60 million years

Answer 1

Hey there,

Your correct answer would be 30 million years.

Hope this helps.

~Jurgen

Answer 2

Out of the choices given here, it was 30 million years ago the two species differed by a total of six mutations.