Context: In a group of pea plants, some individuals have a tall stem and others have a short stem. In this group, the gene for the stem height trait has two alleles. The allele for a tall stem (H) is dominant over the allele for a short stem (h).
A certain pea plant from this group has the homozygous genotype hh for the stem height gene.
Based on this information, what is this plant's phenotype for the stem height trait?
A. a short stem
B. a tall stem
Identify the correct option from the choices provided and respond with the letter of the correct option.
Answer: A