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).
Astro is a cow from this group. Astro has the heterozygous genotype Hh for the horns gene.
Based on this information, what is Astro's phenotype for the horns trait?
A. having horns
B. not having horns
Choose the right answer from the options and respond with its letter.

B