niall

Hey guys, Im really struggling getting my head around the math involved in these types of questions, can anyone work through it with me? Thanks, N The question I've been set is: With what frequency would the phenotype a b C appear in the descendancy when the following cross is carried out in D.melanogaster? Females a B c/A b C x Males A B c/a b C, taking into account that the recombination frequency between A and B is 0.20, between B and C is 0.15, and the coefficient of coincidence is 0.25.