Calico cats, as the name suggests, are cats with three colors, usually black, red (orange) and white. However, if the colors on the body are arranged out of order and the colors are uneven, the appearance will be greatly compromised. Some people may ask, what kind of calico cat is beautiful? Let me tell you in detail below.
Calico cats refer to colors and do not distinguish between types. Most calico cats are female cats. Calico cats are cats with three colors on their bodies, black, orange and white. Generally speaking, part of the fur of calico cats is orange. Foreigners like to define the orange hair they see as red, so they have the names red tabby or red Persian. As for the inner color of the coat, it is because she has another spot gene whose expression level varies greatly. When the expression of this gene is high, it makes the fur white, and when it is low, the original color can be revealed. For cats with only a single color gene, if they carry this spot gene, they will have colored and white piebald fur. If it is a female cat with two colors, it will show three flowers.
But why do tricolor cats have to be female cats? Because the genes that control tricolor are together with the genes that control gender, called sex-linked genes, so tricolor cats must be female cats. So are there tri-color male cats? It’s common for male cats to appear tri-color due to genetic abnormalities, but most of them will suffer from reproductive problems.
Mammalian female xx has two chromosomes, that is, any gene is There is a pair, one more than the male. In order to maintain normal expression levels, one of the pair of genes is turned off during development, which means that each somatic cell only randomly expresses one gene on the two X chromosomes. In other words, female somatic cells Expression may be random expression of genes from either the father's or mother's X chromosome. Tortoiseshell female cats have two genes on the X chromosome with different colors, and one or the other is randomly expressed in her fur.And the level of expression may also be different, so it shows fur like tortoiseshell.
Of course, the average appearance of Cat Star people is quite good, and there are still relatively few ugly ones. Even if they are ugly, they are still ugly and handsome, haha!
