Question

Phenotype ChangesA population of mice live in an area. Some of the mice have brown fur, and some of the mice have a mutation that causes them to have white fur. A small section of the genome is shown for a brown mouse and a white mouse A codon table is shown.



Where did the mutation occur that caused the mice to have different fur color?

A.
in the DNA

B.
in the mRNA

C.
in the folded protein

D.
in the amino acid sequence

Answer 1

A. in the DNA

Explanation: A mutation is a change in the DNA sequence. That altered DNA produces a changed mRNA codon, which can change the amino acid sequence and thus the folded protein and phenotype (fur color). The change originates in the DNA, not in the mRNA, amino acids, or the folded protein.