A striking cat’s black, silver and smoke coloration is a result of the modifying genes. Interestingly, the smoky coloration has a fainter area on its chest. The silver color is the result of a dominant Agouti gene combined with a dominant Inhibitor gene.
modifying genes affect the shade of the colour
Smoke colour in striking cats is mainly determined by the presence of modifying genes, which influence the intensity and shade of colour in cats. These genes include Brown, Dilution, Dilute-Modifier (D-M), and Silver (Locus I, Inhibitor). The brown gene, which affects the intensity of black pigment, is recessive and can change the normal black pigment to a cinnamon colour or a brown shade. Inhibitors I and d/d are recessive, whereas the Silver gene is dominant.
The browning gene B/b/bl codes for a gene known as TYRP1, which plays a role in the metabolic pathway responsible for the production of eumelanin pigments. There are two recessive forms of this gene: b is a pale reddish-brown colour and c is a light chestnut. Another recessive variant is called cinnamon, which is a light red colour.
Besides the two types of smoke pigmentation, cats can also have multiple shades of a specific colour. A striking cat may have many shades of orange. Some cats have orange or brown patches on their coats, while others have black or grey. The orange shade may be caused by modifying genes or by a genetic mutation.
Smoke colour in striking cats can be a result of modifying genes that control the production of basic pigments. The basic pigments are yellow and black, and their expression levels vary between cats. When combined with the modifying genes, these pigments result in striking patterns in cats.
Another example is the silver tabby. This phenotype is a variation of the Norwegian Forest Cat. Its black and blue patches are brightened by modifying genes, but the base of its hair is also darkened with silver. These cats are often referred to as silvers, but they can also have silver-tipped fur like the Abyssinian ticked fur. This colour is inherited through a combination of jungle cat and domestic cat hybridisation.
tipped cats have a sparkling appearance
Silver and smoke cats are not purely silver, but have a combination of both black and white colors. They are generally tipped on the head, with the underlying tabby pattern still visible. The tipped appearance is a result of a dominant gene called the Inhibitor. The Inhibitor gene also determines the width of the light band and the top-colour and under-colour.
The tipped appearance gives them a glittering appearance. This color combination is a result of several genetic systems working together. According to Neils C. Pedersen’s book, Feline Husbandry, 1991, there are a small number of smokes bred with solid-coloured cats. These cats lack an obvious white undercoat, but they have a narrow band of silver and white smoke colors, giving them a sparkling appearance.
The tipped British Shorthair is a crossbreed of two British cats. Both sexes are very similar in size, with the male reaching maturity at around two years of age. Their bodies are broad and strong, and they are a good choice for families who are looking for a playful cat. They also have deep-green eyes and a brick-red nose.
The tipped cat’s color pattern is determined by genetic factors. The pigmentation of the undercoat is regulated by a gene called melanin inhibitor. It can be light or dark, depending on the underlying genetic makeup of the cat. Other genetic factors, such as the presence of the Hypostatic Silver gene, can affect the width of the pale band.
Smoke Persian cats were first described in the 1860s. Initially, these cats were thought to be the offspring of a cross between blacks and blues. In 1872, Harrison Weir described one smoke Persian that was white with black tips. However, he preferred cats that were dark, and the smoke Persians that were white with black tips were considered inferior in appearance.
chinchilla shading is caused by a dominant Inhibitor gene + dominant Agouti gene + one of the tabby pattern genes
Chinchilla shading is caused by varying combinations of three different genes – a dominant Inhibitor gene, a dominant Agouti gene, and one of the tabby pattern genes. These three genes determine the overall appearance of the cat. Although the three genes have the same exact sequence, they differ in the coloration and penetrance. Chinchillas tend to be silver-colored with a dusting of black on their coats.
The basic wild-type tabby gene is called Mc/mc. It produces a tabby pattern that looks like a mackerel. The stripes are made up of thin fishbones that break into bars or spots. A cat with a dominant Inhibitor gene + Agouti gene + one of the tabbie pattern genes will have a classic tabby pattern. This pattern is often found in the UK.
The Inhibitor of Colour gene is another gene that affects colour. It is present in both wild and domestic cats. The Inhibitor gene prevents pigment from blocking the pigment in a cat’s fur. When the Inhibitor gene is absent, the cat is white. The Inhibitor of Colour gene is also present in tigers and lions. However, the white colour is caused by a recessive allele of the gene.
The dominant Agouti gene causes the bands of dark brown and light orange pigmentation in the hair. When the hair begins to grow, the agouti gene slows down pigment synthesis and stops the process after it has grown. This results in dense pigment in the tip and the yellow to orange band.
Some cats with a 50/50 ratio of white/black hair shafts to their total body colour can be classified as tortoiseshell. There are also cats with a 50/50 ratio of black to white hair shafts, and those with a majority of white hair shafts and a color tip. The CFA does not recognise many other colors, including black smoke, black shaded, and shell black.
tipped cats have a greater degree of wide-band
Wide-Banded cats are those with an increased percentage of yellow pigment in their coats. This trait is usually homozygous in eumelanin series cats, but it can also occur in a recessive form. Wide-banding cats show a golden undercoat, with normal pigmentation elsewhere. They are distinguished from shaded cats, which have more pigment at the tip of the hair shaft.
A tipped cat’s distinctive pattern is the result of the presence of a dominant gene called the Inhibitor. Some cats may also have a recessive gene known as ticked tabby. As a result, a tipped cat has an underlying tabby pattern, but the underlying pattern is more subtle. The breakthrough tabby pattern does not become evident until the cat grows its hair long enough to reveal its underlying pattern. Once the cat’s hair is long enough, however, the underlying tabby pattern will gradually diffuse. Eventually, the cat’s coloration is only a sparkling effect.
As the wide-band effect is polygenic, it is difficult to pinpoint a single gene that causes wide-banding in a specific cat. Nonetheless, breeders usually note that a particular gene causes the trait in a particular breed, but this is not the case. Most wide-banded cats have an excess of wide-banded hairs.
Genetics is complex in tabby cats, involving several genes and polygenes. The expression of one gene results in a grey undercoat and tarnishing, while another gene causes pale black smoke. A combination of both genes causes a unique pattern called a mink pattern.