This is determined by the chromosome of male and female cats. Since the genes that manage the hair color only exist on X chromosome . Therefore, compared with male cats with chromosome XX, female cats with chromosome XX have three cats with three cats with chromosome XY, most of them are female cats.
Why are the three cats all female?
Among the many cats of color, the three cats are the most special because of their three cats. What’s more special is that most of the three cats are female cats, and the three cats are rare. The color blocks of different colors are actually the external manifestations of the cat DNA and are determined by the X chromosome. For female cats, the chromosome is XX, one of which is the color of orange and the other which is the color of black.
, while male cats only have one X chromosome, so they can only display one color. In fact, all three-bean cats suffer from K's syndrome , which means they have two X chromosomes. Due to the 23rd pair of chromosome abnormalities, they have one more X chromosome than normal male cats, so their gene map is XXY.
The probability of a genetic defect in humans is only 0.2%, while the probability of a cat is even smaller. So if you have a three-frank cat in your house, it is really rare.
It is precisely because of this genetic defect that the three-waka cats are basically infertile. Don’t discriminate against Sanhuacao just because it cannot give birth. You should know that the prototype of Zhaocao is Sanhuacao. So in a sense, the three-gama cat is also a symbol of good luck. If you are lucky enough to meet such a cat, please cherish it.
