There are also other piebald patterns which appear to be due to different genes or to cats being homozygous for a modifier gene since the effect is relatively uniform and predictable. One parent is black with odd eyes, the other is black with a white facial blaze and blue eyes. Air Cycling Shoes Black There are also several patterns with their own names. IOW, black shoes and white or no socks was a requirement of the rules.
Black socks or white socks
Questions to the gentleman. Overview of dress codes. Europeans and their socks. When do your socks start to fade? Where do lost socks go? Care tips for your socks. How do you relax? New in Bordeaux red: Delphine boxers with stripes. Schweiz de Suisse fr Switzerland en. Europäische Union de Union européenne fr European Union en.
Rest of the world en Reste du monde fr. Always look your best - day in and day out. Buy socks Discover our socks. Try out the quality of our products for yourself by ordering a test pair of socks! Which socks do you like? Sockscriptions With the sockscription you get 3 pairs of socks delivered regularly to your door! NEW New in Bordeaux red: Business Light Stripes If your daily sock choice is a bit dull, accentuate it with our finely striped socks.
Are you a subscriber yet? Choose the easiest interface between man and sock! Underwear with a perfect fit Do you prefer boxers or briefs? True, socks are less conspicuous than most other elements of your clothing. However, wearing an unaesthetic combination or, worse, the wrong kind of socks can attract attention. Remember that in matters of clothing and demeanor, the devil is in the details. When it comes to dressing for an important event, no element is trivial enough to overlook.
Your email address will not be published. Skip to content Skip to primary sidebar While we are on the topic of clothing and appearance, this is a little pet peeve of mine. Wearing white socks with black shoes is a style faux pas. A few broad guidelines are in order.
Generally, match the color of your socks to that of your shoes. Avoid light-colored socks with dark shoes. In particular, avoid wearing white socks with black shoes. Men should also avoid pastel and flesh-toned socks. If you own an assortment of black, blue-black, and dark brown socks, be careful when matching socks into pairs. When you are indoors or under low light, you may inadvertently mismatch socks and wind up wearing one each of two different dark colors.
The cat shown top left has a mild form of radial hypoplasia which has caused her deformed forelegs; she also has a slightly deformed skull.
Swirled Patterns Swirled Patterns. More unusual is the "skunk marking" - a white dorsal stripe. Because early theories said that pigment producing cells migrated away from the neural crest, the dorsal area itself should remain coloured in low to medium grade spotting.
In the case of a skunk stripe, the crack between areas of black is a straight line along the back rather than several random cracks it's a cat with "continents" rather than "islands"! The appearance of a white dorsal stripe is unusual and appears to be hereditary especially as it was a recognised variety of cat in old Thai manuscripts.
The descriptions were considered fanciful by many western cat fanciers, but a growing interest in Thai breeds and the ease of uploading photographs to the internet has shown that the patterns do indeed exist. It is not a recognised pattern in any Western cat breed. In September , Alaina Hickman, who works with a rescue group in Omaha, NE called Feline Friendz, sent me some photos of a black kitten, Gogo, that started developing parallel white stripes along her back.
The stripes were becoming more pronounced as the kitten gets older. She also found a photo screen grab shown of a similar kitten named Jackson. The colour change may be a form of leukotrichia that starts along the back and includes the tail - it is similar to the cat depicted in the Thai manuscript - but is more likely to be "fever coat" which can develop in kittens and vanishes when the coat is moulted and the adult coat grows in.
Genetically all cats are tabby the addition of a double dose of the non-agouti gene turns the coat solid coloured and you can see that the white has followed what would have been the dorsal stripe in a tabby cat. This is also seen on tabby kittens where the stripes along the back are greyish or reddish, giving a chipmunk appearance!
More brindled bicolours are explained in the separate page on Roan, Tweed and "Salt and Pepper" Colours. During the s, there were attempts to breed shorthaired cats with a black tail, black patches on the head and small black or other solid colour patches or spots on the body.
Named Chinese Harlequin, it was supposed to resemble cats found in ancient Chinese art. Although still listed by some registries, it appears to now be extinct due to the difficulty of breeding bicolours with consistent spotted markings.
A similar "strikingly spotted" cat, the Gao Taem, is seen in ancient Thai art and is described as having, black marked forepaws, black and white ears, black shoulders, two black spots on the back and black shoulders. In total there should be nine horse-like black spots on an all white background. If it existed as a breed, the mutation creating these features has been lost.
This appears to be a form of Seychelles Van pattern. Some bicolours have black toes or paws and and some breeders have attempted to fix this trait to create a black-footed Van-type bicolour. Also depicted in Thai art is the Vichiens Mas which is shown as white with dark ears, nose, paws and whiskers.
Although depicted as black and white, it seems to be a stylised or idealised depiction of the seal-point Siamese. This pattern has occasionally been seen in Spanish feral cats. Piebald spotting is a semi-dominant gene with very variable expression.
Low grade spotted cats and some medium grade, spotted cats are heterozygotes i. Other medium grade spotted cats and all high grade spotted cats are homozygotes i. Where cats are in the medium spotted range it is generally impossible to know whether they are heterozygotes or homozygotes unless they are bred to a cat known to be either homozygous or heterozygous. To further complicate matters for breeders, some apparently non-piebald cats are really piebald cats whose white bits are so minimal they might be no more than a few hairs in the groin or at the tip of the tail!
In January , it was announced that piebald patches form when cells fail to develop in the womb. The gene for white spotting affects the embryo cells melanoblasts which will become pigment-producing skin cells melanocytes which make the pigment for hair.
Pigment cells move and multiply as an embryo grows and there aren't enough cells to cover all the skin, so the animal gets a white belly. The findings were published in the journal Nature Communications. The pigment cells 'fail to follow instructions' during early development.
They move and multiply randomly as an embryo grows, without complex cell-to-cell communication sending them in one direction as once thought. The University of Edinburgh's Dr Richard Mort said that the cells move and multiply at random which is not what was expected.
What the researchers found was counter-intuitive. Previously it was widely thought that the defective kit gene slowed cells down, but instead they found that it reduced the rate at which the pigment cells multiply. Researchers at the Universities of Bath and Edinburgh said that in addition to kit, there are many other genes that can create piebald patterns, but their the mathematical model can explain piebald patterns regardless of the genes involved. This wasn't entirely surprising to many cat fanciers with an interest in genetics or embryology!
Independently of scientific researchers, and based on observation, fanciers had some ideas of their own, which have turned out to be close to the mark. Many cats have patches which look as though they could be fitted together like jigsaw pieces; for example a coloured spot on a leg might correspond to an inlet on a coloured patch on the flank, exactly as though a piece of coloured area has broken off and migrated elsewhere. Spots could end up almost anywhere depending on the timing of cracking, the size of the coloured domains, and the trajectories they take over the embryonic surface as it grows.
Terada and Watanabe found it possible to fit all the coloured areas of cat coat together. The seams can then be projected onto the surface of a sphere the embryo. As the sphere expands, the coloured area cracks apart. Think of a balloon covered in solidified chocolate: The cracked solid surfaces then gave patterns just like those found on bicolour cats. The swirled patterns in particular fit this hypothesis. Part of this theory was that the patterning of black and white was the result of the skin surface "cracking" during early embryo development.
The skin of such bicolour cats at an early embryo stage would be basically pigmented, but the dominant W S white spotting gene, causes the pigmented surface to crack into domains or islands. These islands drift apart over the embryonic surface as the embryo grows, but the pigment cells don't multiply fast enough to fill the spaces between the island.
That leaves white areas in the regions between the islands of pigment. It may help to think of it as similar to the movement of the earth's continents with areas of sea inbetween. It is just as though the white areas were scar tissue produced by the cracking. There are not enough melanocytes available to fill the white areas as their surface expands. This means that the black domains can end up pushed together to form a single tuxedo style black area albeit there may be some small white markings in this single black area.
The white belly area might be a ventral belly seam from a ventral crack earlier on - it is suspected that the belly area expands greatly during embryo growth. Megacolon in cats and exposed gut conditions in some rabbits upholds this theory. Black feet could indicate a black domain that has been pushed to the foot extremity by the expansion of the ventral region at the same time that the limbs are being formed.
Where the white spotting occurs over the eyes, it may affect the eye colour. Thus a few bicolour cats have blue eyes. Another interesting effect of white spotting is in tortoiseshell cats.
Tortie cats with little or no white tend to have brindled coats with intermingled black and orange hairs. However, the more white there is, the more the black and white will also be separated out into patches instead of being intermingled. This is also explained by the mechanism detailed in the report findings. The black pigmented cells that have moved across the embryo surface multiply to form black islands clonal patches , while the red pigmented cells that moved across the surface multiply to form red patches.
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