Male Calico

Did you know that the gene for calico coloring in cats is sex related? Two copies are required and they both belong to the female. So only females can be calico.

Unless...

You have an XXY male - also known as Klinefelter Syndrome in humans. Approximately 1 in 10,000 calico cats are male. That's the last published statistic I've found. Rumor has that they may be slightly more common, but either way - it's pretty rare.

XXY males also have the unfortunate side effect of being sterile. This means you can't breed more male calico cats. They simply happen at random.

Interesting.

AMH