A)

Look at the DNA sequence.
C G T T A C T G C A A T
G C A A T G A C G T T A
Which sequence shows a substitution mutation?
(1 point)

C G T C T A C T G C A A T
G C A G A T G A C G T T A

C G T G A C T G C A A T
G C A C T G A C G T T A

C G T A C T G C A A T
G C A T G A C G T T A

C G T T A C T G C A A T
G C A A T G A C G T T A

The correct answer is:

C G T C T A C T G C A A T
G C A G A T G A C G T T A