Chapter 3, Problem 3EQ

In his original studies of Figure 3.18, Morgan first suggested that the original white-eyed male had two copies of the white-eye allele. In this problem, let’s assume that he meant the fly was ${\text{X}}^{\text{w}}{\text{Y}}^{\text{w}}$ instead of ${\text{X}}^{\text{w}}\text{Y}$. Are his data in Figure 3.18 consistent with this hypothesis? What crosses would need to be made to rule out the possibility that the Y chromosome carries a copy of the eye color gene?