But Wait! My Friend/Sister/Cousin/Neighbor Has A Male Calico!
Maybe they do. And it does happen occasionally. Every few thousand tricolor cats that are born, you may find one male. A male tricolor cat is a genetic misfire. Genetically, instead of being XY, he is XXY. Animals are meant to have chromosomes in pairs, and having three chromosomes where he is supposed to have two can cause health problems. And almost always causes sterility. It is also possible that he is not a true genetic tricolor, but merely has unusual markings that make him resemble one.
- See more at: http://www.delightibles.com/calicos-torties-and-torbies-need-to-know-about-tricolor-cats/#sthash.y3wyCm4A.dpuf