Question

this passage describes the coat graying trait in horses: your hair may turn gray or white as you grow older. some horses go through a similar process called coat graying as they age. these horses are usually a darker color, such as brown or black, when they are born. over time, the hairs of their coats lose their original color and become gray or white. in a group of horses, some individuals have coat graying and others do not. in this group, the gene for the coat graying trait has two alleles. the allele for not having a graying coat (g) is recessive to the allele for having a graying coat (g). juniper, a horse from this group, has coat graying. based on junipers phenotype for the coat graying trait, which of the following could be junipers genotype for the coat graying gene? select all that apply. gg gg gg

Explanation:

• Since the allele for not having a graying coat (\(g\)) is recessive to the allele for having a graying coat (\(G\)), a horse with coat graying (the dominant phenotype) can have either a homozygous dominant (\(GG\)) or heterozygous (\(Gg\)) genotype. A homozygous recessive (\(gg\)) genotype would result in the horse not having coat graying (the recessive phenotype).

Answer:

GG, Gg