Currently, the Cat Fancier's Association (CFA) recognizes a standard for a calico in several long-haired breeds such as the Maine Coon, Norwegian Forest, Exotic and Siberian, Turkish Angora and American Curl among others. read more
"Calico cats are almost always female because the X chromosome determines the color of the cat, and female cats—much like all female mammals—have two X chromosomes, whereas male mammals, including common male cats, have one X and one Y chromosome. read more