Sex-Linked Traits — Definition & Examples

You have entered the highly lucrative field of fruit fly breeding. You cross a red-eyed female fruit fly and a white-eyed male fly. They have 200 children, which is very impressive. White eyes are an X-linked recessive trait, and you know that your female fruit fly had no white eyed genes. If 50% of all the children they have are male, how many of them will have white eyes?