Two species are having their DNA analyzed to determine if they share a common ancestor, if they are closely related. One scientists compares the amino acids produced by the two species. The other scientists compares the DNA sequence between the two species. The DNA sequence between the two species shows a
greater variance than the amino acids. Which of the following is the most likely explanation for these results?
A) some variances in amino acids cannot be detected
B) some genes are not expressed creating greater variances in the DNA
C) there exists only 4 DNA bases compared to 20 different amino acids
D) several different DNA triplet sequences can code for the same amino acid