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A cat hair showing agouti coloration A domestic rabbit with agouti coloration. Agouti is a type of fur coloration in which each hair displays two or more bands of pigmentation. [1] [2] The overall appearance of agouti fur is usually gray or dull brown, [3] although dull yellow is also possible.
An agouti dog, also called wolf sable. In dogs, the agouti gene is associated with various coat colors and patterns. [10]The alleles at the A locus are related to the production of agouti-signaling protein (ASIP) and determine whether an animal expresses an agouti appearance and, by controlling the distribution of pigment in individual hairs, what type of agouti.
The inhibitor gene interacts with the non-agouti genotype (I-aa) to produce the color known as smoke. The homozygous recessive genotype when combined with the agouti gene (iiA-), produces tabby coloration, which can vary along a spectrum ranging from a deeply patterned brown tabby, to a lighter "golden tabby", to the very lightly colored shaded ...
A y = Fawn or sable. Tan with black whiskers and varying amounts of black-tipped and/or all-black hairs dispersed throughout. Fawn typically referring to dogs with clearer tan and sable to those with more black shading. a w = Wild-type agouti. Each hair with 3-6 bands alternating black and tan. Also called wolf sable. a t = Tan point.
Agouti-signaling protein is a protein that in humans is encoded by the ASIP gene. [5] [6] It is responsible for the distribution of melanin pigment in mammals.[7] [8] Agouti interacts with the melanocortin 1 receptor to determine whether the melanocyte (pigment cell) produces phaeomelanin (a red to yellow pigment), or eumelanin (a brown to black pigment). [9]
Agouti – Variations of "wild colored" rabbits: hair shafts exhibit three or more bands of pigment. The eye circles, belly, under jaw, and underside of tail are cream or off-white. Colors include castor, amber, opal, lynx, and chinchilla (Black, blue, chocolate, lilac, sable chinchilla, smoke pearl chinchilla).
Image credits: Detroit Photograph Company "There was a two-color process invented around 1913 by Kodak that used two glass plates in contact with each other, one being red-orange and the other ...
Agouti-based colors include agouti, cinnamon, and fawn. Black-based colors include black, beige, blue, and chocolate. [18] Eye color is considered a subset of coloring, and coat color definitions often include standards for the eyes, as many genes which control eye color will also affect the coat color or vice versa.