White spotting

White Spotting Gene
As I understand it the white spotting gene causes the bicolor pattern through its interaction with a recessive allele (see below) of the agouti gene.

White Spotting
White Spotting - random patches of white on a colored coat varying from small spots to large areas
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White Spotting - Refers to the presence of small white areas on an otherwise Solid-coloured cat.

White spotting
See also Piebald.
The white patches, caused by the Piebald Spotting gene, are called white spotting.

White Spotting: A term referring to a coat pattern of random patches of white on a colored coat which vary from small spots to large areas.
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White spotting, barring on tail, top of the head unticked, unbroken necklaces or leg bracelets. Very small eyes or ears. Visible tail faults. Blue eyes.
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PIE BALD WHITE SPOTTING GENE - Prevents migration of pigment cells, prevents formation of pigment in areas on the cat, thus forming areas of white surrounding pigment. The gene causes premature melanocyte death.

Blue eyes: White spotting anywhere other than around the eyes, nostrils, chin and upper-throat; except white agouti ground in silver colours.
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These cats are mixed-breed, as significant white spotting is not found in the Siamese breed (although some small bits like a little white spot on the toes is found; this is considered a disqualification for showing).

The Snowshoe has Siamese style points combined with white paws and white spotting. The coat is short and glossy and the mask, ears, legs and tail are much darker than the body, coming in blue, seal, lilac, chocolate varieties.

If the Birman male used was a purebred, he could have produced a Traditional Ragdoll if Josephine was carrying a white spotting gene and a pointed gene. This same "if" applies to the White Persian female, if that was what Josephine was.

Spotting factor: Gene causing white spotting in the cat¹s coat.
SQ: Subcutaneous - under the skin. Also SC
Stop: Indentation on the bridge of the nose, usually between the eyes.

Spotting factor: Gene causing white spotting in the cat¹s coat.
Stop: Indentation on the bridge of the nose, usually between the eyes.
Stud: Male cat.

This pattern is governed by the piebald white spotting gene symbolized (S). Because this gene is incompletely dominant, if a cat inherits two copies of the gene, it will have larger areas of white than a cat with one copy of the gene.

^ A chart of the effects of the piebald white spotting gene
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There doesn't seem to be any evidence of this, either. The Ragdoll's white spotting gene is definitely not the same as in the Birman breed, according to TICA's genetics committee chairperson, Dr. Solveig Pflueger, M.D., Ph.D.

Tabby/non-solid patterns, preferred pattern is black with white "teardrop" on the forehead and white spotting on the top of the tail, sometimes forming a skunk-like stripe. Slow to mature.

is a medium-to-large cat that combines the heftiness of its American Shorthair ancestors with the length of its oriental ancestors. It gives the appearance of great power and agility. The unique combination of the pointed pattern, the white spotting ...

Patterns may vary with white spotting. Regardless of specific markings, this is a most striking looking animal. The broad, triangular head has an inverted, white "V" extending from the forehead to the muzzle.

Slight variations exist between associations for patterns/colours accepted, but conformation and coat-quality and texture requirements are unilateral. Full beauty develops with maturity; shedding is minimal. White spotting is not allowed.

Cats with blue eyes (with the exception of those with "Turner blue eyes") have a higher incidence of deafness than those with coloured eyes. White cats carrying the white spotting gene may have an increased risk factor and white cats which had large ...

The white 'boots' on the hind legs, called gauntlets, should continue all the way up to the level of the hocks. The Mitted Ragdoll's entire underbody is white, from tip to tail. This variety carries the dominant white spotting gene.

White spotting or white locket.
History
A spotted athlete with mascara markings around her eyes. "Ocicat" is a combination of the words "ocelot" (a spotted wild cat of the Americas) and "cat".

See also: Spotting, Genes, CFA, Champion, Registration