We crossed diheterozygous male Drosophila flies with a gray body and normal wings (dominant characters)

We crossed diheterozygous male Drosophila flies with a gray body and normal wings (dominant characters) with females with a black body and shortened wings (recessive characters). Make a scheme for solving the problem. Determine the genotypes of the parents, as well as the possible genotypes and phenotypes of the F1 offspring, if the dominant and recessive genes of these traits are linked in pairs, and crossing over does not occur during the formation of germ cells.

In this task, inheritance occurs according to the type of complete dominance. The gene for the gray body is A, the gene for the black body is a, the gene for normal wings is B, and the gene for shortened wings is b. Male genotype: AaBb, female genotype: aabb. From males there are only two variants of gametes, since these genes are linked: Ab, aB.

R: AaBb x aabb;

G: Ab, ab x ab – possible gametes;

F1: Aabb – 50% gray body, shortened wings;

aaBb – 50% black body, normal wings.