Hello, I want to study the inheritance of red eyes and white eyes in drosophila. I have mated red-eyed females with white eyed males. F1: All F1 females were white eyed and all F1 males were red-eyed. 19 white eyed females and 22 red eyed males. I have also crossed the females and males of the F1 generation, but this is not relevant for my question. I am trying to draw a pedigree chart for the P generation and their offspring, but there is a small problem. I know that this trait is sex-linked, and that the white eyes allele is recessive. Let R denote the red eyes allele and r the white eyes allele. Here is what I get: Please, what is the problem?