To determine the distance between short and black on chromos

To determine the distance between short and black on chromosome II the student made the reciprocal cross. F, females backcrossed to homozygous b, p, sh males She observed the following offspring What is the distance between sh and b? Enter your answer as a whole number.

Solution

Answer - 15 cM - Because there is 15% recombination between the genes sh and b.