Question

in horses, black hair color is dominant to chestnut hair color. if the black horse is homozygous, what is its genotype?
bb
if the black horse is heterozygous, what is its genotype?
bb
bb
bb

Explanation:

Step1: Recall Genotype Rules

Dominant allele (black, B) and recessive (chestnut, b). Homozygous: same alleles (BB or bb). Heterozygous: different alleles (Bb).

Step2: Apply to Heterozygous

Black is dominant, so heterozygous black must have one dominant (B) and one recessive (b) allele. So genotype is Bb.

Answer:

Bb (from the options: B. Bb)