cat logo
Feline Genetics

bar

Continued from page 5

The Shaded Colors

The shaded colors are formed by adding the inhibitor gene, "I*", to the standard solids. If the expression is light, a smoked coat is produced, if moderate, a shaded coat, and if heavy, a tipped or chinchilla coat. Only six of the eight possible colors are recognized.

The tortie chinchillas are formed by adding a moderate-to heavy expression of the inhibitor gene, "I*", to the standard torties. Only four of the six possible colors are recognized.

Color Karyotype Usual eye color

(silver) smoke B*ooD* C*aa** I*ssww cpr org yel
blue smoke B*oodd C*aa** I*ssww cpr org yel
chestnut smoke b*ooD* C*aa** I*ssww cpr org yel
lavender smoke b*oodd C*aa** I*ssww cpr org yel
red smoke **OOD* C***T* I*ssww cpr org yel
cream smoke **OOdd C***T* I*ssww cpr org yel

(silver) shade B*ooD* C*aa** I*ssww cpr grn
blue shade B*oodd C*aa** I*ssww cpr grn
chestnut shade b*ooD* C*aa** I*ssww cpr grn
lavender shade b*oodd C*aa** I*ssww cpr grn
red shade **OOD* C***T* I*ssww cpr grn
cream shade **OOdd C***T* I*ssww cpr grn

(silver) chinchilla B*ooD* C*aa** I*ssww grn
blue chinchilla B*oodd C*aa** I*ssww grn
chestnut chinchilla b*ooD* C*aa** I*ssww grn
lavender chinchilla b*oodd C*aa** I*ssww grn
red chinchilla **OOD* C***T* I*ssww grn
cream chinchilla **OOdd C***T* I*ssww grn

tortie chinchilla B*OoD* C*aaT* I*ssww cpr org yel
blue tortie chinchilla B*Oodd C*aaT* I*ssww cpr org yel
chestnut tortie chinch b*OoD* C*aaT* I*ssww cpr org yel
lavender tortie chinch b*Oodd C*aaT* I*ssww cpr org yel

The Golden Chinchilla Colors

The golden chinchillas are formed by combining the mackerel and Abyssinian alleles of the tabby gene, "TTa", with the standard solids. This produces a coat of undercoat-colored hairs tipped with the standard colors. Selective breeding has altered the undercoat polygenes to produce a striking warm-gold color. Only three of the eight possible colors are recognized.

The golden chinchilla torties are formed by combining the mackerel and Abyssinian alleles of the tabby gene, "TTa", with the standard torties. This produces a coat with hairs of undercoat color tipped with the standard tortie colors. While any combination is possible, only two colors are recognized.

Color Karyotype Usual eye color

golden chinchilla B*ooD* C*A*TTa iissww gld
honey chinchilla b*ooD* C*A*TTa iissww gld
copper chinchilla **OOD* C***TTa iissww cpr gld

golden tortie chinch B*OoD* C*A*TTa iissww gld
honey tortie chinch b*OoD* C*A*TTa iissww gld

The Silver Tabby Colors

The silver tabbies are obtained by adding a moderate expression of the inhibitor gene, I*, to the standard tabbies. Only six of the eight possible colors are recognized.

Color Karyotype Usual eye color

silver tabby B*ooD* C*A*T* I*ssww hzl grn
silver blue tabby B*oodd C*A*T* I*ssww hzl grn
silver chestnut tabby b*ooD* C*A*T* I*ssww hzl grn
silver lilac tabby b*oodd C*A*T* I*ssww hzl grn
silver red tabby **OOD* C***T* I*ssww hzl grn
silver cream tabby **OOdd C***T* I*ssww hzl grn

The Spotted Tabby Colors

The bronze spotted tabbies are genetically standard mackerel tabbies with the mackerel striping broken into spots by the effects of various polygenes. Ideal coats have evenly spaced round spots. Only six of the eight possible colors are recognized.

The silver spotted tabbies are bronze spotted tabbies with a moderate expression of the inhibitor gene, "I*", added. This produces a pattern of jet black spots on a silvery agouti background. Only six of the eight possible colors are recognized.

Color Karyotype Usual eye color

bronze B*ooD* C*A*T* iissww gld
bronze blue B*oodd C*A*T* iissww cpr gld
bronze chocolate b*ooD* C*A*T* iissww cpr gld
bronze lavender b*oodd C*A*T* iissww cpr gld
copper **OOD* C***T* iissww cop
bronze cream **OOdd C***T* iissww gld

silver B*ooD* C*A*T* I*ssww hzl grn
silver blue B*oodd C*A*T* I*ssww hzl grn
silver chocolate b*ooD* C*A*T* I*ssww hzl grn
silver lilac b*oodd C*A*T* I*ssww hzl grn
silver red **OOD* C***T* I*ssww org hzl grn
silver cream **OOdd C***T* I*ssww org hzl grn

The Abyssinian Colors

The Abyssinians are primarily standard tabbies with the Abyssinian allele of the tabby gene, "Ta*". This produces an all-agouti coat, similar to that of the wild rabbit.

The silver Abyssinians are Abyssinians with a moderate expression of the inhibitor gene, "I*". This produces the all-agouti ticking on a pale silver undercolor.

It should be noted that among Abyssinians there are two genetically different reds that are virtually identical in appearance: "red," which is in reality cinnamon, and "true red," which is red.

ColorKaryotypeUsual eye color

ruddyB*ooD* C*A*Ta* iissww org amb grn
blueB*oodd C*A*Ta* iissww org amb grn
chestnutb*ooD* C*A*Ta* iissww org amb grn
lavenderb*oodd C*A*Ta* iissww org amb grn
redblblooD* C*A*Ta* iissww org amb
fawnblbloodd C*A*Ta* iissww org amb
true red**OOD* C***Ta* iissww cpr org amb
cream**OOdd C***Ta* iissww cpr org amb

silverB*ooD* C*A*Ta* I*ssww grn
silver blueB*oodd C*A*Ta* I*ssww grn
silver chestnutb*ooD* C*A*Ta* I*ssww grn
silver lilacb*oodd C*A*Ta* I*ssww grn
silver redblblooD* C*A*Ta* I*ssww yel
silver fawnblbloodd C*A*Ta* I*ssww yel
true silver red**OOD* C***Ta* I*ssww org yel
silver cream**OOdd C***Ta* I*ssww org yel

The Oriental Solid Colors

The oriental solids are identical in every way to the standard solids except in their names. Oriental color names tend to be used with cats of oriental build, effectively solid-color Siamese.

ColorKaryotypeUsual eye color

ebonyB*ooD* C*aa** iisswwgrn
blueB*oodd C*aa** iisswwgrn
chocolateb*ooD* C*aa** iisswwgrn
lilacb*oodd C*aa** iisswwgrn
caramelblblooD* C*aa** iisswwgrn
fawnblbloodd C*aa** iisswwgrn
red**OOD* C***T* iisswwgrn
cream**OOdd C***T* iisswwgrn

The Burmese Colors

The Burmese colors are formed from the standard solid colors by the reduction in color expression from full, "C*", to the Burmese alleles, "cbcb". This is a partial albinism and causes a slight reduction in color intensity: black becomes sable. These colors are used almost exclusively for the Burmese and related breeds, such as the Malayan and Tiffany.

ColorKaryotypeUsual eye color

sableB*ooD* cbcbaa** iisswwgld
blueB*oodd cbcbaa** iisswwgld
champagneb*ooD* cbcbaa** iisswwgld
platinumb*oodd cbcbaa** iisswwgld
cinnamonblblooD* cbcbaa** iisswwgld
fawnblbloodd cbcbaa** iisswwgld
red**OOD* cbcb**T* iisswwgld
cream**OOdd cbcb**T* iisswwgld

The Tonkinese Colors

The Tonkinese colors are formed from the standard solid colors by the reduction of color expression from full, "C*", to combined Burmese and Siamese, "cbcs". This is a partial albinism and causes a downgrade in color expression, the body color becoming a light-to-medium brown and the points becoming Burmese. These colors are used only with the Tonkinese breed.

ColorKaryotypeUsual eye color

natural minkB*ooD* cbcsaa** iisswwtrq
blue minkB*oodd cbcsaa** iisswwtrq
honey minkb*ooD* cbcsaa** iisswwtrq
champagne minkb*oodd cbcsaa** iisswwtrq
cinnamon minkblblooD* cbcsaa** iisswwtrq
fawn minkblbloodd cbcsaa** iisswwtrq
red mink**OOD* cbcs**T* iisswwtrq
cream mink**OOdd cbcs**T* iisswwtrq

The Siamese Colors

The Siamese solid-point formed from the standard colors by the reduction of color expression from full, "C*", to Siamese, "cscs". This is a partial albinism and causes a downgrade in color expression, the body color becoming fawn and the points becoming Burmese. The solid- point colors are formed from the standard solids, the tortie-point from the standard torties, the lynx-point from the standard tabbies, and the torbie-point from the standard torbies. Only six of the eight possible solid- or lynx-point and four of the six possible tortie- or torbie-point colors are recognized.

ColorKaryotypeUsual eye color

seal pointB*ooD* cscsaa** iisswwsbl
blue pointB*oodd cscsaa** iisswwsbl
chocolate pointb*ooD* cscsaa** iisswwsbl
lilac pointb*oodd cscsaa** iisswwsbl
red point**OOD* cscsT* iisswwsbl
cream point**OOdd cscsT* iisswwsbl

seal tortie pointB*OoD* cscsaaT* iisswwsbl
blue tortie pointB*Oodd cscsaaT* iisswwsbl
chocolate tortie pointb*OoD* cscsaaT* iisswwsbl
lilac tortie pointb*Oodd cscsaaT* iisswwsbl

seal lynx pointB*ooD* cscsA*T* iisswwsbl
blue lynx pointB*oodd cscsA*T* iisswwsbl
chocolate lynx pointb*ooD* cscsA*T* iisswwsbl
lilac lynx pointb*oodd cscsA*T* iisswwsbl
red lynx point**OOD* cscs**T* iisswwsbl
cream lynx point**OOdd cscs**T* iisswwsbl

seal torbie pointB*OoD* cscsA*T* iisswwsbl
blue torbie pointB*Oodd cscsA*T* iisswwsbl
chocolate torbie pointb*OoD* cscsA*T* iisswwsbl
lilac torbie pointb*Oodd cscsA*T* iisswwsbl

The Van Colors

The van colors are formed from the standard solid colors by the addition of the van gene, "Wv". This is a masking gene, covering the effects of the agouti, color-expression, tabby, inhibitor, and white- spotting genes. The van gene, a modified dominant-white gene, causes the coat to be white with color on the crown of the head, ears, and tail only. The preferred van color is auburn (orange). The tail is often tabby-ringed.

ColorKaryotypeUsual eye color

black vanB*ooD* ****** ****Wv*org wbl odd
blue vanB*oodd ****** ****Wv*org wbl odd
chestnut vanb*ooD* ****** ****Wv*org wbl odd
lavender vanb*oodd ****** ****Wv*org wbl odd
cinnamon vanblblooD* ****** ****Wv*org wbl odd
fawn vanblbloodd ****** ****Wv*org wbl odd
auburn van**OOD* ****** ****Wv*org wbl odd
cream van**OOdd ****** ****Wv*org wbl odd

The Whites

White is not a color, but rather a masking of the color genes resulting in an absence of color. There are five ways a cat can have an all white coat: be full-inhibited white, be full-spotted white, be dominant white, be blue-eyed albino, or be albino. Each of these ways is genetically different.

The full-inhibited white coat comes from a 100% expression of the inhibitor gene, "I*", masking all colors and patterns. Since the current trend in chinchilla coats is to have just a hint of tipping, certain kittens are bound to be born where the "hint" is effectively zero, creating an all-white cat. Since the colors still exist, the eyes will be the proper color for the masked "true" coat colors, and may be anything except dominant-white blue, albino blue, or pink.

The full-spotted white coat comes from a 100% expression of the white spotting gene, "S*", masking all colors and patterns. This coat may have a few non-white hairs, especially on a kitten. Like the full- inhibited white, the eyes will be the proper color for the masked "true" coat colors, and may be anything except dominant-white blue, albino blue, or pink.

The dominant white coat comes from expression of the dominant-white gene, "W*", masking all colors and patterns. The eyes are always orange, dominant-white blue, or odd.

The blue-eyed albino comes from expression of the blue-eyed albino allele of the albino gene, "ca*", masking all colors and patterns. The eyes are always albino blue.

The albino coat comes from expression of the albino allele of the albino gene, "cc", masking all colors and patterns. The eyes are always pink.

ColorKaryotypeUsual eye color

full-inhibited white****** ****** l*****not wbl/abl/pnk
full-spotted white****** ****** **S***not wbl/abl/pnk
dominant white****** ****** ****W*org wbl odd
blue-eyed albino****** ca***** ******alb
albino****** cc**** ******pnk

R. Roger Breton
Nancy J Creek

Back | Page 1

bar

 logo
NetPets® Main Page

contact information

Back to Library

Genetics

cat
The Cat Center