The mitochondrial DNA sequence that is shared by two species has a steady mutation rate. Scientists determine the sequences of these two species to be as follows:

Species A: CAGGCCATTATG
Species B: CCAGCCTATAGG

This DNA sequence has a known mutation rate, which the scientists used to calculate that the species diverged from a common ancestor 80 million years ago. Using this information, how much more time do you predict will pass before these species differ by a total of eight base pairs?

160 million years

32 million years

48 million years

240 million years

Question

The mitochondrial DNA sequence that is shared by two species has a steady mutation rate. Scientists determine the sequences of these two species to be as follows:
 
Species A: CAGGCCATTATG
Species B: CCAGCCTATAGG
 
This DNA sequence has a known mutation rate, which the scientists used to calculate that the species diverged from a common ancestor 80 million years ago. Using this information, how much more time do you predict will pass before these species differ by a total of eight base pairs?

 160 million years

 32 million years

 48 million years

 240 million years