~Fur Genetics~
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Rabbit fur has many genes (10 or more), some dealing with color and others dealing with patterns. To fully understand rabbit fur, you must know that there are four dark pigments and three yellowish pigments availible in rabbit fur, and that certain genes turn off a certain number of both pigments, or leave all pigments in the fur. Some alleles in a gene are dominant over all other genes, such as the Ruby-eyed white allele - you rabbit will be albino regardless of whatever comes after it.

The first set of alleles is in the "A" group, including "A", "at", and "a" This group controls whether the rabbit has the Agouti pattern - which is when the shafts of hair have multiple bands of different colors, all haphazardly strewn through the fur. This is the natural color of wild rabbits.
A: Agouti
The rabbit has fawn, tan, or white circles around the eyes, a fawn, tan, or white triangle at the nape of the neck, and fawn, tan, or white legs, feet, and inner ears. White undersides
at: Tan
Identical to Agouti, but the body has solid hairs instead of banded. Also, the belly can be either white, tan, or fawn.
a: Self
The rabbit has no banding in their fur, and a single color is evenly distributed throughout
The next set of allelles is the "B" group, including "B" and "b."
B: Black
If it follows an "AA/Aa/Aat" (agouti) gene, then it will have black bands of color in its fur. If if follows an "aa" (self) gene, then the rabibit will be solid black. If it follows an "atat" (tan) gene, the body of the rabbit will be black with tan, white, or fawn markings.
b: Brown
Identical to the Black allele, but instead of black coloration, the rabbit has brown coloration
The next group is the "C" group, which controls the yellow and dark pigments in rabbit fur. It includes "C," "c(chd)," "c(chl)," "c(hl)," and "c"
C: Full color
All pigments are present in the rabbit's fur. It is dominant over all other C alleles
c(chd): Chinchilla Dark
All four dark pigments are present in the fur, but only one of the yellow colors. Fur has a whitish tint. It is dominant over any alleles under it.
c(chl): Chinchilla Light
Two dark pigments and no yellow pigments are present in the fur. The rabbit turns a sepia color, with Shading effects also present. It is dominant over the c(hl) allele
c(hl): Pointed White
Causes extremeties (feet, tail, nose, and ears) to become dark while the rest of the fur is white. Eyes lose pigment and become pink. The Pointed White gene has some dominance over the "c" allele
c: Ruby-eyed White (albino)
When paired with another "c" allele, it causes fur and eyes to lose all pigment, thus making the rabbit albino. This gene keeps all other colors in the genotype out of the phenotype.
The next line is the "D" group, including "D" and "d." This gene controls the pigment concentration in the coat
D: Dense color
The rabbit's fur color is fully expressed and eyes turn brown
d: Dilute color
The fur color is made less intense, thus turning Black to Blue, Orange to Fawn, Chestnut to Opal, and Chocolate to Lilac. Eyes turn grayish-blue
The next group is the "E" group, which deals with the extension of dark colors. It includes "Es," "E," "ej," and "e"
Es: Steel
Deals with agouti rabbits. The mid-band of color darkens, along with the extremeties, neck pattern, and eye markings. All hairs are ticked with white
E: Normal Extension
Works with the "C" group to fully express any present dark colors
ej: Japanese Brindling
Working with an agouti gene, this makes the yellow and dark pigments arrange in sections instead of on individual hairs
e: No extension
Removes most or all dark colors, leaving yellow, orange, or white,
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