Context: In a group of cows, some individuals have horns and others do not. In this group, the gene for the horns trait has two alleles. The allele for having horns (h) is recessive to the allele for not having horns (H).
Walker is a cow from this group. Walker has the homozygous genotype hh for the horns gene.
Based on this information, what is Walker's phenotype for the horns trait?
A. having horns
B. not having horns
From the given choices, choose the correct answer and respond with the letter of that choice.

A