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Everything about Tabby Cat totally explained

A tabby cat is a cat with a distinctive coat that features stripes, dots, or swirling patterns. Tabbies are often mistakenly assumed to be a breed of cat. In fact, the tabby pattern is a naturally occurring feature that may be the original coloration of the domestic cat's distant ancestors. Tabby color is found in many breeds of cat, as well as among the general 'moggy' (mixed-breed or mongrel) population. When cats are allowed to breed randomly, the coloration of the population tends toward brown mackerel tabbies with green eyes, leading geneticists to believe that this is the common wild phenotype of the domestic cat. The tabby usually has an "M" mark on its forehead.
   The word comes from French tabis, which was earlier atabis, and in medieval Latin attabi. The initial origin of the word seems to be from the Attabiyah section of Baghdad where a type of striped silk was made that was later used to describe cats.

Tabby patterns

Descriptions

There are four tabby patterns that have been shown to be genetically distinct: mackerel, classic, spotted and ticked. A fifth includes tabby as part of another basic color pattern, the "patched" tabby, which may be a calico or tortoiseshell cat with tabby patches (the latter is called a "torbie"). The steel-white of the fur is what gives it its name.

Genetic explanations

In cat genetics, pattern is unrelated to color, and so the tabby pattern may occur in any cat color, including tortoiseshell (tortoiseshell tabby cats are often called 'torbies'). White spotting of any level can also appear in combination with tabby patterns.
   The tabby patterns are due to 3 distinct gene loci and one modifier:
The agouti gene, A/a, controls whether or not the tabby pattern is expressed. The dominant A reveals the underlying tabby pattern, while the recessive non-agouti or "hypermelanistic" allele, a, prevents it. Solid-color (black or blue) cats have the aa combination, hiding the tabby pattern, although sometimes a suggestion of the underlying pattern can be seen (called "ghost striping"). However, the O gene for orange color suppresses the aa genotype, so there's no such thing as a solid orange cat.
   The primary tabby pattern gene, Mc/mc, sets the basic pattern of stripes that underlies the coat. Mc is the wild-type tabby gene and produces what is called a 'mackerel striped' tabby. 'Classic' tabbies are cats who also possess mc, a recessive mutant gene that produces the blotched pattern.
   The ticked pattern is on a different gene locus than the mackerel and classic tabby patterns and is epistatic to the other patterns. A dominant mutation, Ta / ta, masks any other tabby pattern, producing a non-patterned or 'agouti' tabby with virtually no stripes or bars. If the ticked pattern gene is present, any other tabby pattern is masked. Cats homozygous for the ticked allele (Ta / Ta) have less barring than cats heterozygous for the ticked allele.

State Law

The tabby cat is the official state cat of Massachusetts pursuant to Mass. Gen. Law ch. 2, §138 (2008).

Further Information

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