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The ability of the E locus to override the coat colour directed by the B locus is a classical example of epistasis, where multiple genetic loci affect the same observed trait. [2] In a study of Labrador retrievers in the United Kingdom, it was found that chocolate labradors had a shorter average lifespan than either black or yellow labradors.
They also shed their gray-brown summer topcoat, becoming all white during the winter. [ 1 ] Arctic hare - In Newfoundland and southern Labrador, the Arctic hare changes its coat color , moulting and growing new fur, from brown or grey in the summer to white in the winter, like some other Arctic animals including ermine and ptarmigan , enabling ...
A dog's coat is composed of two layers: a top coat of stiff guard hairs that help repel water and shield from dirt, and an undercoat of soft down hairs, to serve as insulation. [1] Dogs with both under coat and top coat are said to have a double coat. Dogs with a single coat have a coat composed solely of guard hairs, with little or no downy ...
Dog coat color is governed by how genes are passed from dogs to their puppies and how those genes are expressed in each dog. Dogs have about 19,000 genes in their genome [2] but only a handful affect the physical variations in their coats. Most genes come in pairs, one being from the dog's mother and one being from its father.
Coat: The Labrador Retriever's coat should be short and dense, but not wiry. The coat is water-resistant, so the dog does not get cold when taking to the water in the winter. That means that the dog naturally has a slightly dry, oily coat. Acceptable colours are black, yellow, and chocolate. [15]
In addition, the animal may be single-coated or may have a number of coats, such as an undercoat and a topcoat (also called an outer coat or, sometimes, overcoat), which is made up of guard hair. The state of the coat is considered an indication of the animal's breeding and health. Animals might have different coat quality for different seasons.
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Cats moult fur around spring-summer time to get rid of their "winter coat". Cats have thicker fur during the colder winter months to keep them warm, then around spring and summer they shed some of their fur to get a thinner coat for the warmer summer months. Some cats need brushing during moulting, since dead hairs can get trapped in the cat's fur.