I incorporated pages ripped from a donated Harry Potter book, and I ended up with this lovely tortoiseshell. Hey, I can’t control the magic.
Infodump
It seems not everyone knows that tortoiseshells (and calicos) are almost always XX, and on the rare occasion that they’re not, then they are XXY (intersex). These patterns require two X chromosomes. So, a black and orange stray cat is never XY.