Hehe...I should have been more precise in my response. I am aware (in a vague, uneducated way) of sex-linked genetics in humans. But I have never heard of any relating to snakes. And most certainly not with regard to the basic genetics that we hobbyists are exposed to and discuss on a daily basis. I'm quite sure that even with "primitive" animals like snakes, the complete story of their genetic make-up is far deeper and more complex than we can imagine. But for now...for me personally...I'm content to understand how to breed a snake with bright white patches, or lovely yellow & white, or beautiful caramel coloring...etc...