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Dog Coat Genetics
Dogs have a wide range of coat colors, patterns, textures and lengths. Dog coat qualities are 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 but only a handful affect the physical variations in their coats. Dogs have two copies of most genes, one from the dog's mother and one from its father. Genes of interest have more than one version, or allele. Usually only one or a small number of alleles exist for each gene. In any one Locus (genetics), gene locus a dog will either be homozygous where the gene is made of two identical alleles (one from its mother and one its father) or heterozygous where the gene is made of two different alleles (one inherited from each parent). To understand genetically why a dog's coat physically looks the way it does requires an understanding of only a handful of canine coat genes and their alleles. For example, to understand how a black and white greyh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dilution Gene
A dilution gene is any one of a number of genes that act to create a lighter coat color in living creatures. There are many examples of such genes: General Diluted coat colors have melanocytes, but vary from darker colors due to the concentration or type of these pigment-producing cells, not their absence. Pigment dilution, sometimes referred to as hypomelanism, has been called leucism, albinism (perfect, impartial, or dilute), ghosting, paling, and isabellinism. *Albinism describes a condition where pigment cells synthesize little or no pigment *Leucism describes a condition that creates loss of pigment cells Cats Cat coat genetics discusses many dilution genes in cats. Dogs In dogs, a mutation of the ''MLPH'' locus known as the dilute gene causes eumelanin to lighten while pheomelanin remains almost unchanged. Dogs of some breeds with the dilute gene often suffer from colour dilution alopecia (CDA). Appearance Of the colour shades found in the coat of dogs, the light brown ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dog Coat Variation
The dog (''Canis familiaris'' or ''Canis lupus familiaris'') is a Domestication of vertebrates, domesticated descendant of the gray wolf. Also called the domestic dog, it was Selective breeding, selectively bred from a population of wolves during the Late Pleistocene by hunter-gatherers. The dog was the first species to be domesticated by humans, over 14,000 years ago and before the History of agriculture, development of agriculture. Due to their long association with humans, dogs have gained the ability to thrive on a starch-rich diet that would be inadequate for other Canidae, canids. Dogs have been bred for desired behaviors, sensory capabilities, and physical attributes. Dog breeds vary widely in shape, size, and color. They have the same number of bones (with the exception of the tail), powerful jaws that house around 42 teeth, and well-developed Dog sense of smell, senses of smell, hearing, and sight. Compared to humans, dogs possess a superior sense of smell and heari ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Adult Male Weimeraner On The Prowl 2
An adult is an animal that has reached full growth. The biological definition of the word means an animal reaching sexual maturity and thus capable of reproduction. In the human context, the term ''adult'' has meanings associated with social and legal concepts. In contrast to a non-adult or " minor", a legal adult is a person who has attained the age of majority and is therefore regarded as independent, self-sufficient, and responsible. They may also be regarded as "majors". The typical age of attaining legal adulthood is 18 although definition may vary by legal rights, country, and psychological development. Human adulthood encompasses psychological adult development. Definitions of adulthood are often inconsistent and contradictory; a person may be biologically an adult, and have adult behavior, but still be treated as a child if they are under the legal age of majority. Conversely, one may legally be an adult but possess none of the maturity and responsibility that may def ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Siberian Husky
The Siberian Husky is a dog breed, breed of medium-sized Working dog, working sled dog. The breed belongs to the Spitz genetic family. It is recognizable by its thickly furred Coat (dog), double coat, erect triangular ears, and distinctive markings, and is smaller than the similar-looking Alaskan Malamute. Siberian Huskies originated in Northeast Asia where they are bred by the Chukchi people as well as the Koryaks, Koryak, Yukaghir people, Yukaghir and Kamchadals, Kamchadal people of Siberia for sled pulling and companionship. It is an active, energetic, resilient breed, whose ancestors lived in the extremely cold and harsh environment of the Siberian Arctic. William Goosak, a Russian fur trader, introduced them to Nome, Alaska, during the Nome Gold Rush, initially as sled dogs to work the mining fields and for expeditions through otherwise impassable terrain. Today, the Siberian Husky is typically kept as a house pet, though they are still frequently used as sled dogs by Sled ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pheomelanin
Melanin (; ) is a family of biomolecules organized as oligomers or polymers, which among other functions provide the Biological pigment, pigments of many organisms. Melanin pigments are produced in a specialized group of cells known as melanocytes. There are five basic types of melanin: #Eumelanin, eumelanin, #Pheomelanin, pheomelanin, neuromelanin, allomelanin and pyomelanin. Melanin is produced through a multistage chemical process known as melanogenesis, where the oxidation of the amino acid tyrosine is followed by polymerization. Pheomelanin is a cysteine, cysteinated form containing polybenzothiazine portions that are largely responsible for the red or yellow tint given to some skin or hair colors. Neuromelanin is found in the brain. Research has been undertaken to investigate its efficacy in treating neurodegenerative disorders such as Parkinson's. Allomelanin and pyomelanin are two types of nitrogen-free melanin. The phenotype, phenotypic color variation observed in t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neapolitan Mastiff
The Neapolitan Mastiff or is an Italian breed of large dog of mastiff type. It was recognised as a breed by the Ente Nazionale della Cinofilia Italiana in 1949, and accepted by the Fédération Cynologique Internationale in 1956. It descends from the traditional guard dogs of central Italy, and is closely related to the Cane Corso. History The Neapolitan Mastiff derives from the traditional catch and guard dogs of central Italy. Selection of the breed was begun in 1947 by Piero Scanziani, who had seen one at an exhibition in Naples in 1946. He drew up the first standard, which in 1949 was officially recognised by the Ente Nazionale della Cinofilia Italiana. It received full acceptance from the Fédération Cynologique Internationale in 1956. Characteristics The Neapolitan Mastiff is large, massive and powerful, with a weight in the range and a height at the withers Withers are the ridge between the shoulder blades of an animal, typically a quadruped. In man ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Staffordshire Bull Terrier
The Staffordshire Bull Terrier, also called the Staffy or Stafford, is a purebred dog of small to medium size in the terrier group that originated in the northern parts of Birmingham and in the Black Country of Staffordshire, for which it is named. They descended from 19th-century bull terriers that were developed by crossing bulldogs with various terriers to create a generic type of dog generally known as bull and terriers. Staffords share the same ancestry with the modern Bull Terrier, although the two breeds developed along independent lines, and do not resemble each other. Modern Staffords more closely resemble the old type of bull terrier, and were first recognised as a purebred dog breed by The Kennel Club of Great Britain in 1935. Within the broad sweep of dog history, the story behind the modern Stafford is rather brief and somewhat confusing because of the multiple aliases attached to these dogs in centuries past, such as the "Patched Fighting Terrier", "Staffo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Greyhound
The English Greyhound, or simply the Greyhound, is a dog breed, breed of dog, a sighthound which has been bred for coursing, greyhound racing and hunting. Some are kept as show dogs or pets. Greyhounds are defined as a tall, muscular, smooth-coated, "S-shaped" type of sighthound with a long tail and tough feet. Greyhounds are a separate breed from other related sighthounds, such as the Italian greyhound. The Greyhound's combination of long, powerful legs, deep chest, flexible spine, and slim build allows it to reach average race speeds exceeding . A racing greyhound can reach a full speed of at least . However, the most common speeds at which they usually win races are . Its maximum speed is attained whether running on a straight track or a curved track. Appearance Males are usually tall at the withers, and weigh on average . Females tend to be smaller, with shoulder heights ranging from and weights from , although weights can be above and below these average weights. Gr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tibetan Mastiff
The Tibetan Mastiff is a large Tibetan dog breeds, Tibetan dog breed. Its double coat is medium to long, subject to climate, and found in a wide variety of colors, including solid black, black and tan, various shades of red (from pale gold to deep red) and bluish-gray (dilute black), and sometimes with white markings around its neck, chest and legs. According to the American Kennel Club, male Tibetan Mastiffs have a weight of 40-70 kg (90-150 lbs) while females are 30-55 kg (70-120 lbs). Name The term ''mastiff'' was assigned by the Europeans who first came to Tibet because that name was used to refer to nearly all large dog breeds in the West. Early Western visitors to Tibet misnamed several of its breeds, such as the Tibetan Terrier, Tibetan terrier, which is not a terrier, and the Tibetan Spaniel, Tibetan spaniel, which is not a spaniel. A better name for the breed might be the ''Tibetan mountain dog'' or—to encompass the landrace breed throughout its range—the ''Himalaya ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Whippet
The Whippet is a British breed of dog of sighthound type. It closely resembles the Greyhound and the smaller Italian Greyhound, and is intermediate between them in size. In the nineteenth century it was sometimes called "the poor man's racehorse". It is commonly kept as a companion dog, for competitive showing or for amateur racing, and may participate in various dog sports, including lure coursing, agility, and flyball. It has the fastest running speed within its weight and size range, and is believed to have the fastest idle-to-running acceleration of any dog. Whippets are characterized by their gentle, affectionate, and calm temperament. While typically relaxed and serene at home, they exhibit high energy and excitement when outdoors. Originally bred as hunting and racing dogs, Whippets have a strong prey drive, which may lead them to chase small animals. Whippets have a minimal-shedding coat that is easy to manage due to its short, smooth texture and lack of an unde ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Weimaraner
The is a German breed of hunting dog of medium to large size, with history going back at least to the nineteenth century. It originated in the area of the city of Weimar (then in Saxe-Weimar-Eisenach, now in the state of Thuringia), for which it is named. It was recognised as a breed in 1891. It is an all-purpose gun dog, characterised by its speed and stamina, its good nose and eye, and its courage and intelligence; in Germany it is not considered suitable for keeping as a companion dog. History Many theories of the origin of the Weimaraner have been advanced, but there are few documented historical facts; silver-grey dogs are shown in paintings by Antoon van Dyck in the seventeenth century and by Jean-Baptiste Oudry in the eighteenth. The breed is believed to have originated in the area of the city of Weimar (then in Saxe-Weimar-Eisenach, now in the state of Thuringia) – the city from which its name derives. It is sometimes claimed that the dogs were kept at the cou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isabelline (colour)
Isabelline (; also known as isabella) is a pale grey-yellow, pale fawn (colour), fawn, pale cream-brown or parchment colour. It is primarily found in animal coat colouring, particularly plumage colour in birds and, in Europe, equine coat color, in horses. It also has historically been applied to fashion. The first known record of the word was in 1600 as "isabella colour"; this use later became interchangeable in literature with "isabelline" after the latter was introduced into print in 1859. The origin of the word is unclear; the uncertainty prompted by this has generated several attempts to provide an etymology and led to one prominent legend. Usage and origins The first recorded use of ''isabella'' as the name of a colour in English was in the year 1600, to describe an item in Elizabeth I of England's wardrobe inventory: "one rounde gowne of Isabella-colour satten ... set with silver spangles". ''Isabelline'' as a derivative term was first used in the journal ''Ibis (journal), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
