>>54934408Orange and black coats are coded in the sex chromosome X. Therefore a male cat can only have either of them. There's also the white fur factor but I don't really know how it works.
On the other hand females have two Xs which means for a female cat to be a single color, she needs to have two copies of the orange gene. Instead most of them have one of each, which produces either calicos like picrel, or tortoiseshells (no white).
Conversely a male calico cat is nearly impossible barring genetic disorders like Klinefelter (XXY male)
