Question

A molecule that can be used as a molecular clock has a neutral mutation rate of one mutation per 5 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 eight mutations?

-1.5 million years

-10 million years

-40 million years

-20 million years

Answer 1

I thought it was 40 million, so I guess I was wrong.

Answer 2

I'm not sure...ok, let me confirm
@thomaster, @aaronq

Answer 3

Okay :P

Answer 4

8 mutations
1 per 5 million years

8*5=?

Answer 5

40

Answer 6

\(\Huge\ddot\smile\)

Answer 7

Thnxxxx

Answer 8

thank you guys