You cross a mutant with phenotype x y z to a mutant with the

You cross a mutant with phenotype \'x y z^+\' to a mutant with the phenotype \'x^+ y^+ z\' and test cross the F1. Given this genetic map, predict the phenotypes observed in the offspring, and the number of each expected in a population of 2500 (show your work). x y z

Solution

Parents: Mutant with phenotype xyz⁺   and mutant with phenotype x⁺y⁺z. (Note the wild type is x⁺y⁺z⁺)

Parent cross P₁ : xyz⁺/xyz⁺ X x⁺y⁺z/x⁺y⁺z

F₁ generation offspring: xyz⁺/x⁺y⁺z

Test cross: xyz⁺/x⁺y⁺z X   xyz/xyz (Note phenitypic recessive is xyz)

It is given, that the genetic map of these three traits are as follows:

x<12.0 mu > y < 24.0 > z

I map unit = 1% recombination