Answer to Question #68836 in Genetics for Sundria

Question

Hair colour in guinea pigs, with genotype bb, what is the phenotype?

Answer 1

In guinea pigs, dominant allele "B" states for black fur, while the recessive allele "b" states for white fur.
If an animal has genotype bb, it means that it has two alleles for white fur. Thus, the phenotype of the animal is white.