Question

Two rough black guinea pigs when bred together have two offspring. One of them is rough white and the other is smooth black. What are the genotypes of these parents?
Parent 1 __________ Parent 2 ___________

Answer 1

Answer:

Parent 1 = RrBb

Parent 2 = RrBb

Explanation:

This question involves two genes in guinea pigs. The allele for rough coat (R) is dominant to smooth coat (r), and the allele for black coat (B) is dominant to white coat (b).

According to this question, two rough black guinea pigs when bred together produced two offsprings. One of the offsprings is rough white (R_bb) and the other is smooth black (rrB_). This means that, to produce such offsprings, the parents must be both heterozygous for both genes (RrBb). Please find the punnet square for this cross attached