Based on this information, what is Nabi's phenotype for the body hair trait?
a hairless body a hairy body
In a group of cats, some individuals have a hairy body and others have a hairless body. In this group, the gene for the body hair trait has two alleles. The allele for a hairy body (B) is dominant over the allele for a hairless body (b).
Nabi is a cat from this group. Nabi has the homozygous genotype bb for the body hair gene.
Nabi's genotype for the body hair gene is bb. Nabi's genotype of bb has only b alleles. The b allele is for a hairless body. So, Nabi's phenotype for the body hair trait must be a hairless body.
To check this answer, consider whether Nabi's alleles are dominant or recessive. The allele for a hairy body (B) is dominant over the allele for a hairless body (b). This means B is a dominant allele, and b is a recessive allele.
Nabi's genotype of bb has only recessive alleles. An organism with only recessive alleles for a gene will have the recessive allele's version of the trait. So, Nabi's phenotype for the body hair trait must be a hairless body.