Is it true that ALL calico cats are females?

Not ALL, but most. Here is more info http://www.wisegeek.com/what-is-a-calico-cat.htm

http://www.fluther.com/disc/677/is-it-true-that-all-calico-cats-are-female-why/

they reproduce asexually? Is that possible.

@topserb96:
no. but its something about the genes that it takes to make a calico. that a red/black female mates with a white male and they have a litter of kittens. some are black/white males and females, red males and females, but supposedly the majority of the calicos (red/black/white) end up being females.

oh I c. I guess I didnt know exactly what calico meant.

It is a sex linked trait. There is a prevalent urban myth that says if you have a male calico, researchers will pay huge amounts of money for it. The myth is untrue – researchers know exactly what conditions give rise to a male calico (XXY).

nope, i have a male calico :)