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Complete Changelog and Notes

Sire Dam
? Fur Length
Recessive trait that causes long hair. "Mediumhairs" are generally genetically longhaired, just not as longhaired as some super fluffy breeds.
Fur Length
? Cornish Rex
A recessive trait that causes the pelt type seen in the Cornish Rex and German Rex.
Cornish Rex
? Rex/Hairless
Responsible for Selkirk Rex, Devon Rex, and Sphynx hairlessness.
? LaPerm
A dominant trait that causes the curly coat of the LaPerm breed.
? Wirehair
Causes a springy, wiry coat, including ear fur and whiskers, as seen in the American Wirehair.
? Lykoi
Causes the distinct "fur pointing" of the Lykoi breed.
? Red
Sex-linked trait that represses black pigment. "Red" colors are red (aka ginger), cream, and apricot.
? Eumelanin
This changes the structure of melanosomes (pigment granules), changing all black pigment to chocolate or cinnamon in color.
? Dilution
Changes base colors to their "diluted" color.
Black -> Blue
Chocolate -> Lilac
Cinnamon -> Fawn
Red -> Cream
? Dilute Modifier
If the cat is dilute, this modifier will change their color.
Blue, Lilac, Fawn -> Caramel/Taupe
Cream -> Apricot
Tortoiseshells -> Caramel tortie
Dilute Modifier
? Agouti
Determines whether a cat will be tabby or solid. The Apb allele comes from the Asian Leopard Cat, and is present in Bengals and some related breeds.
? Tabby
Considered the "basic" tabby pattern gene. Mackerel is necessary for the cat to be spotted, while ticked overrides both.
? Spotted
A simplification of polygenes that cause a spectrum from mackerel to broken mackerel to spotted. While spots may appear to follow the Classic pattern, cats who are genetically Classic cannot be Spotted.
? Ticked
Overrides any other tabby pattern with the ticked pattern. Contrary to popular belief, homozygous ticked cats will not be agouti tabby. That pattern is caused by selective breeding for polygenes.
? Bengal Modifier
Simplification of a trait that is most likely polygenic. This modifies the tabby pattern.
Classic -> Marbled
Mackerel -> Braided
Spotted -> Rosetted
Bengal Modifier
? Inhibitor
Restricts pigment, especially red pigment, at the base of the hairs, turning tabbies into silver tabbies and nonagouti cats to smokes.
? Wide Band
A simplification of polygenes that affect the lightness/darkness of nonsolid cats. Under this model, golden tabbies are Wbwb and shaded/tipped cats are WbWb.
Wide Band
? Extension
Currently known to be responsible for the amber color in NFCs, russet Burmese, and carnelian Kurilian Bobtails. Full extension "extends" the black pigment throughout the whole coat normally.
? Sunshine
Sunshine is a recessive trait that appears in Siberians, which presents similarly to golden but can combine with silver to create bimetallic. It may be on the extension gene, but it is here for the time being until it is identified.
? Color Restriction
Causes colorpoint, sepia, mocha, and albino patterns and combinations thereof. From other species, colorpoint-albinos, sepia-albinos, and mocha-albinos seem likely to be lighter than their homozygous forms.
Color Restriction
? Spotted
White spotting, dominant white, and Birman gloving have all ben confirmed to be on the KIT gene. Dominant white makes the whole cat white and is the allele linked to deafness - high white spotted cats have yet to show a link to deafness.
? Karpati
A pattern originating from the Carpathian region, resulting in roaning and white points.
? Curled Ears
Ears that are curled backwards, found in American Curls and breeds derived from them.
Curled Ears  
? Folded Ears
As found in Scottish Folds and breeds derived from them. It is not entirely homozygous lethal, but homozygous individuals are rarer than expected and those that exist are profoundly disabled, so it is treated as lethal for this generator.
Folded Ears  
? Asian Bobtail
Found in the Japanese bobtail and in many populations of asian ferals. Treated as recessive by breeders despite technically being incomplete dominant, since only homozygous cats have the desired bobtail.
Asian Bobtail  
? Manx Bobtail
Found in Manx, American Bobtails, and Pixiebobs. There are a few dominant alleles identified which all seem to work similarly. Lack of homozygous individuals and smaller litter sizes indicate it is most likely homozygous lethal.
Manx Bobtail  
? Ringtail
A mutation found in northern California, which the American Ringtail was developed from. Produces a range of curled tail phenotypes.
? Munchkin
A mutation resulting specifically in shortened legs, distinct from dwarfism. It is homozygous lethal.
? Polydactyl
Extra toes. Polydactyly is a dominant trait with incomplete penetrance, which means not all cats who have the allele will be polydactyl. This is why the chances are worded differently.
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