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A bicolor cat or piebald cat has white fur combined with fur of some other color, for example black or tabby. There are various patterns of bicolor cat. These range from Van pattern (color on the crown of the head and the tail only) through to solid color with a throat locket. Where there is low-to-medium grade white spotting limited to the face, paws, throat and chest of an otherwise black cat, they are known in the United States as a tuxedo cat. High-grade bicolor results in Van-pattern cats. There are many patterns between, such as "cap-and-saddle", "mask-and-mantle" and "magpie" (more randomly splashed). Bicolors are found in many breeds, as well as being common in domestic longhair cats and domestic shorthair cats. Solid color bicolor cats occur because there is a white spotting gene present along with a recessive allele of the agouti gene, which evens out the usual striped pattern of the colors of the coat. In contrast, ''tabby'' cats have an agouti gene that produces striping of the coat. The Abyssinian has agouti (ticked tabby) fur, giving the appearance of even color with color-banded hairs. White spotting can also occur with any of the tabby patterns, resulting in tabby-and-white bicolors. Colorpoint (Himalayan pattern) cats can have bicolor points, although this variation is not recognized for showing. The body markings of bicolor colorpoints become clearer with age, as the body fur of colorpoint cats darkens as the cats grow older and the white patches become more visible. ==Bicolor grades and frequency in cat breeds== Bicoloration in cats is graded from one (1) to ten (10) with one being completely black and ten being completely white. There are also several patterns with their own names. The cat labelled "bicolor" is the preferred pattern in show-quality bicolor purebred cats. A low-grade spotting black-and-white bicolor cat is often known as a "tuxedo cat" or a "Billicat". To be considered a tuxedo cat, the black coloring should be solid throughout, with white limited to the paws, belly, chest, throat, face, and possibly the chin. It should appear as if the cat were wearing a tuxedo. Another type of black-and-white bicolor cat is referred to as a "cow cat" or "moo cat" and includes the magpie, cap-and-saddle and mask-and-mantle patterns. A cow cat does not have the solid black "jacket" of the tuxedo cat. Instead, it has large black patches over a mostly white body, often with a black mask over the head. "Black Mask Cats" are so called because they look like they are wearing a black mask over their head. The Turkish Van (white and red) is one good example of a bicolor breed. Van pattern is known to animal geneticists as the Seychelles (Seychellois) Pattern and is classified into 3 variants:〔(【引用サイトリンク】title=Seychellois )〕 * ''Seychellois Neuvieme'' - white with colored tail and head splashes (classic Van Pattern) * ''Seychellois Huitieme'' - white with colored tail and head splashes plus additional splashes of color on the legs * ''Seychellois Septieme'' - white with splashes of color on the legs and body in addition to those on the head and the colored tail These are high grade white spotting of types nine (9), eight (8) and seven (7) on the bicolor chart above. This coloration is not restricted to a specific breed of cat, as it can be found in many different types of pure-breed as well as mixed-breed domestic cats. However, some breeds of cats are especially noted for having bicolor coats in their breed standards. These include the Turkish Van, American Shorthair, Manx, British Shorthair, and Turkish Angora. In contrast, other common breeds of cat have specific coat patterns specified in their breed standards. These cats are therefore never seen in the bicolor pattern. Cats with such specific coat patterns such as the Russian Blue which has a coat of one solid color. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Bicolor cat」の詳細全文を読む スポンサード リンク
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