Genetics-cats on tri- Only females, including cats, can have three colors on his cloak. Males do not have that combination and with fur unicolor or bicolor. The reason is that the cat's hair colors are closely related to the sex chromosomes.
A female has two X chromosomes (XX), while males have one X and one Y chromosome (XY). However, in cats, the gene O (orange) works in a curious way and is linked to gene X. If a cat has two genes OO is tricolor.
The cat can not possibly be OO, since they only have one X and Y gene is not orange. The behavior in the male cat is really interesting is OY OY orange color is not orange, but it is never possible OO.
Some cats, exceptionally, are tri-color because they have an extra chromosome, ie they are XXY. They are tricolored, but are sterile. This is the case in a cat every 3,000. Rarer is yet to be tricolor and fertile cats with these characteristics are given in the rate of one every 10,000. Curiosities of nature.
