8/28/2023 0 Comments Diluted orange tabbyIt is a sex linked trait, this means that males carriers express differently than females carriers. Orange (often called Ginger) is one of the most interesting modifiers involved in cat coat color genetics. For more photo examples Chocolate and Cinnamon Cats Photo GalleryĮnigmatic Sexis Onfire - Oriental Chocolate Tortie photo courtesy of Fiordiliso Siamese and Orientals Orange (Ginger) For more information on TYRP1 mutations Color Across Species Part 3: TYRP1. ![]() The skin coloration in Cinnamon cats can actually be quite pink. Cats that are self-colored Chocolate will appear a dark rich brown, while cats that are cinnamon will be a lighter brown the skin in both colorations will be diluted. Because only black pigment is diluted, the coat of Orange cats will not be affected and only non-red areas in calico or tortoiseshell cats will be affected. Chocolate and Cinnamon only affect black pigment (eumelanin) but black skin is also diluted. Cats that are bb and bb l will be Chocolate while cats that are b lb l will be Cinnamon. They are listed in the order of dominance. There are currently three known alleles of the B locus, B (wild-type), b, and b l. ![]() ![]() Photo courtesy of Fiordiliso Siamese and OrientalsĬhocolate and Cinnamon are both caused by a mutation in Tyrosinase-related protein 1 (TYRP1). Koosje van Tutte´s Cinna-Mon Amour an Oriental cat and a wonderful example of Cinnamon b lb l. The lack of pigment results in an animal that is pure white with pink skin and very pale blue eyes that often have a pinkish hue. The cc cat is a true albino in that it lacks pigment or melanin. Since true albino is the most recessive of the four alleles, it will only express when the cat or kitten is homozygous for the c allele. Cats that are cc will be albino while cats that are c sc or c bc will express the respective color point mutation. Albino is caused by the most recessive "C" allele. Cats that are c b c b will generally have eyes that are golden or green. Cats that are c s c s will generally have blue eyes while cats that are c s c b will generally have aqua eyes. This can include, but is not limited to black, blue, chocolate, and Orange. The points will be the color or nearly the color the cat would have been without the color point dilution and can be of any color that otherwise occurs in cats. ![]() Kittens with a color point dilutions are born a uniform color (because of the uniform temperature of the womb) with the points darkening as the kitten ages. If both dilution alleles are present ( c s c b), the resultant color is between the two dilutions. A cat that is c b c b is called Burmese or Sepia and will have much darker coloration. The c s c s cat is called Siamese, with the name being taken from the breed that first made the coloration popular. They will provide some level of dilution with c s c s being the most diluted and c b c b being the least. These two mutations restrict the expression of the tyrosinase enzyme (and therefore color) to the points where body temperature is lower ie the outer extremities. The color point mutations are c s and c b. If the dominant allele C is present no dilution will express. There are currently four known alleles of the C locus in cats C, c s, c b, and c, with c being the most recessive and C being dominant. A Cat displaying the Burmese Dilution c bc b Color Point and AlbinoĬolor Point dilutions and Albino are the result of mutations at the "C" locus that codes for the enzyme Tyrosinase.
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