Shouldn’t you be a girl? The male calico cat syndrome

For all the cat lovers out there, cats come in many colors. Two basic pigments to be discussed here are orange and black. There is one curious, rule for cats with patches of orange and black; they are all supposed to be female. The genetics behind this fact is as interesting as the phenomenon itself.

Chromosomes are passed from parent to child. For many animals, including us, the X and Y chromosomes determine gender. For most mammals, the presence of two X chromosomes indicates a female, while the presence of one X and one Y chromosome indicates a male. For a More >