Question

incorrect Question 57 0/1.67 pts A gene family has been accumulating nucleotide substitutions at a rate of 0.15 substitutions per million years. On average, there have been 30 substitutions between the common ancestor of this gene family and each of the various living forms of this gene. Based on these figures, this gene family likely originated million years ago. 200

Answer 1

Answer

nucleotide substitutions accumulation rate = 0.15 substitutions/ million years

there are 30 substitutions

So, solve like this

0.15 substitutions occur in = 1 million years

then 30 substitutions will occur in =0.15 X 30 = 4.5 millions years

this gene family likely originated 4.5 million years ago