Maybe you're thinking tabby? Brown tabbies are often referred to as the "standard issue cat", and are commonly found as both XX and XY cats. Torties are black/brown and orange, and their coloring is the result of having one X chromosome for black/brown, and a second one for orange.

My apologies, I just find their genetics so fascinating!

[–] FuglyDuck 2 points 6 months ago

Definitely not. He’s got that brindle coat with black, light brown and tannish orange. (No white, though.)

My understanding currently is either he has XXY chromosomes, or is a chimera. I’m also fascinated by the genetics, so don’t apologize.