Based on this information, what is this trout's phenotype for the body color trait?

 - a greenish-brown body
 - a blue body
You need to determine the rainbow trout's phenotype for the body color trait. First, consider the alleles in the trout's genotype for the body color gene. Then, decide whether these alleles are dominant or recessive.
The allele for a blue body (b) is recessive to the allele for a greenish-brown body (B). This means B is a dominant allele, and b is a recessive allele.
The rainbow trout's genotype of Bb has one dominant allele and one recessive allele. An organism with at least one dominant allele for a gene will have the dominant allele's version of the trait. So, the rainbow trout's phenotype for the body color trait must be a greenish-brown body.