Question

A third gene pair on a separate autosome determines whether or not any color will be produced. The CC and Cc genotypes allow color according to the expression of the A and B alleles. However, the cc genotype results in albino rats regardless of the A and B alleles present. What proportion of the progeny of the following cross will be gray or albino?

Answer 1

53.125%

Step-by-step explanation:

A. AaBbCc x aaBbCc

p(gray) + p(albino) = p(AaBbC-) + p(cc) =(1/2 x 3⁄4 x 3/4) + (1/4) =9/32 + 1/4 =17/32 = .53125

= 53.125%