Dr. Stevens is examining the DNA sequences of a group of mice. He notices that in one of the mice, one nucleotide pair is

Question

Dr. Stevens is examining the DNA sequences of a group of mice. He notices that in one of the mice, one nucleotide pair is substituted with another in the part of the DNA sequence that codes for fur color. However, despite the substitution, the mouse still has the same fur color as the other mice with the correct DNA sequence. Why
doesn't the substitution of nucleotides in the mouse change its phenotype, or physical characteristics?
A. The mouse has a completely different DNA sequence than the other mice.
B. The substituted nucleotide has the same directions as the original nucleotide.
C. DNA sequences don't determine the color of a mouse's fur.
D. Substitutions in the nucleotides of a mouse's DNA never affect their phenotypes.

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