Two groups of mice have different coat colors. One group is agouti (speckled brown), which is due to a wild-type genotype, and the other is white due to two copies of a recessive mutation in the Blk gene. When the two groups of mice were exposed to different food sources, their coat color remained unchanged. What is impacting coat color?
A) Genes and the environment matter in determining mouse coat color (G+E).
B) Only genotype matters in determining mouse coat color.
C) The effect of the environment on mouse coat color is genotype dependent (i.e., there is a genotype by environment interaction, GxE).
D) Mostly the environment matters in determining mouse coat color.
