Why are calico cats always female?
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M$2 Answers
Calico means that there are 3 colors present. The colors in a cat are a sex-linked trait. The third color comes from the X-chromosome and that comes from the female have XX when the male only has one X.
You can read more in details about how the chromosomes make up the colors at this link:
http://vetmedicine.about.com/od/catbreed1/f/FAQ_calicocats.htm
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M$
The short answer is: genetics and the way that coloring traits are carried on the X chromosomes.
The long answer is: welllll, I'm no genetics expert, so I'm going to point you to this very nicely-written explanation: http://messybeast.com/tricolours.htm
Thanks, and again, welcome!
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M$
