Context: In a group of cows, some individuals have solid coloring and others have white spots. In this group, the gene for the coat pattern trait has two alleles. The allele for solid coloring (A) is dominant over the allele for white spots (a).
Walker is a cow from this group. Walker has the homozygous genotype AA for the coat pattern gene.
Based on this information, what is Walker's phenotype for the coat pattern trait?
A. white spots
B. solid coloring
Choose the right answer from the options and respond with its letter.
Answer: B