Please help settle an argument

[vicrock]

PeterB is correct - O (orange) in cats is sex linked and is found only on the X chromasome, unlike the genes for other colors. Traditional XXY cats which show both black and orange pigment in males are XXY and are sterile.

However you can also have a chimera which is the result of two ova that fuse early in development. These cats are usually fertile.

http://tortietom.nidoba.nl/tortiete.html

Shows a chimera male - who was fertile. Scroll down to Floid