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Archive for February 21st, 2013

Are Calico cats always female?

Thursday, February 21, 2013
posted by Jim Murphy

You may be surprised to hear that the majority of calico cats are female.  Is it possible for a calico cat to ever be a male?  First off, you must understand what a calico cat is. Is not a cat breed but rather a color pattern. Three colors are always present, black, white and orange. Most are female because of genetics. Coat color in cats is a sex linked trait. Female animals have two X chromosomes (XX), males have one X chromosome and one Y chromosome (XY). The coding for black or orange coloring is found in the X chromosome . White coloring is a separate gene. Since females have two X chromosomes, they can display two colors such as orange and black or variations. They can also display white creating a three color mix.  Males have only one X chromosome and can display orange OR black. So can a calico cat ever be male. Yes in very rare cases where the male cat has two X chromosomes.

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