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Brindle
Brindle is a coat (animal), coat coloring pattern in animals, particularly dogs, cattle, guinea pigs, cats, and, rarely, horses. It is sometimes described as "tiger-striped", although the brindle pattern is more subtle than that of a tiger's coat. Brindle typically appears as black stripes on a red base. The stripes are eumelanin (black/brown pigment) and the base is phaeomelanin (red/yellow pigment), so the appearance of those pigments can be changed by any of the genes which usually affect them. * Eumelanin (the pigment making up the stripes) can be affected by: merle (and harlequin), liver, dilution, greying, and recessive red. * Phaeomelanin (the pigment making up the base) can be affected by: Intensity locus. White markings and ticking can occur on any brindle dog. Brindle is caused by a complex gene process and is technically a form of mosaicism, where some cells express one allele (KB) and other cells express a different allele (ky), a little like tortoiseshell cats. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Equine Coat Color
Horses exhibit a diverse array of coat colors and distinctive horse markings, markings. A specialized vocabulary has evolved to describe them. While most horses remain the same coat color throughout life, some undergo gradual color changes as they age. Most horse markings, white markings are present at birth, and the underlying skin color of a healthy horse does not change. Certain coat colors are also associated with specific breeds, such as the Friesian, which is almost exclusively black. The basic outline of equine coat color genetics has largely been resolved, and DNA tests to determine the likelihood that a horse will have offspring of a given color have been developed for some colors. Discussion, research, and even controversy continue about some of the details, particularly those surrounding spotting patterns, color sub-shades such as "sooty (gene), sooty" or "flaxen gene, flaxen", and horse markings, markings. Basic coat colors The two basic pigment colors of horse hair ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Guinea Pig Breed
Guinea Pigs, also known as cavies (''Cavia porcellus''), have been domesticated since around (or cicra) 5000 BCE, leading to the development of a diverse array of breeds. These breeds exhibit a wide range of physical characteristics and serve various purposes. Some are show breeds, notable for their long, flowing hair, while others are laboratory breeds, used as model organisms in scientific research. The period from 1200 to 1532 CE, which coincides with the Spanish conquest of the Incan Empire, saw indigenous South Americans selectively breeding guinea pigs. This resulted in numerous landrace varieties of domestic guinea pigs, which have since become the foundation for some of the formal modern breeds. Early Andean varieties were primarily kept as livestock, agricultural stock for food, and efforts at improving cavy breeds (''cuy'') bred for food continue to the modern era, with entirely separate breeds that focus on size and disease resistance. Details With the export of guinea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tabby Cat
A tabby cat, or simply tabby, is any domestic cat (''Felis catus'') with a Cat_coat_genetics#Tabbies , coat pattern distinguished by an M-shaped marking on its forehead, stripes by its eyes and across its cheeks, along its back, around its legs and tail, and characteristic striped, dotted, lined, flecked, banded, or swirled patterns on the body: neck, shoulders, sides, flanks, chest. The four known distinct patterns, each linked to genetics, are the mackerel, classic or blotched, ticked, and spotted tabby patterns. "Tabby" is not a Cat breeds, breed of cat but a coat pattern. It is common among Moggy, non-pedigree cats around the world. The tabby pattern occurs naturally and is connected both to the coat of the domestic cat's direct ancestor and to those of its close relatives: the African wildcat (''Felis lybica lybica''), the European wildcat (''Felis silvestris''), and the Asiatic wildcat (''Felis lybica ornata''), all of which have similar coats, both by pattern and colorat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cairn Terrier
The Cairn Terrier is a terrier breed originating in the Scottish Highlands and recognised as one of Scotland's earliest working dogs. The name "Cairn Terrier" was a compromise suggestion when the breed was brought to official shows in the United Kingdom in 1909, initially under the name "Short-haired Skye terrier". This name was not accepted by the Kennel Club when faced with opposition from breeders of the Skye Terrier. The alternative name Cairn Terrier was adopted. History Cairn terriers originated in the Scottish Highlands and the Isle of Skye. Prior to 1873, terriers in Scotland were collectively referred to as 'Scottish Terriers'. In the early days of the breed's establishment, the name 'short haired Skye Terrier' was used. After concerns raised by the Skye Terrier Club, the name 'Cairn Terrier' was given to the breed instead. The name 'Cairn Terrier' comes from cairns, where the terriers often flushed out vermin. The Cairn Terrier was registered into the American Ken ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cardigan Welsh Corgi
The Cardigan Welsh corgi (; Welsh language, Welsh for "dwarf dog") is one of two different varieties of livestock-herding dogs, herding dog breeds known as Welsh Corgi, Welsh corgis (originating in Wales), with the other being the Pembroke Welsh corgi. It is one of the oldest breeds of the British Isles. Cardigan Welsh corgis are known to be an extremely loyal and trainable dog breed, naturally attuned to herding many different animals, from poultry and waterfowl to large livestock such as sheep and cattle. They are also versatile and can live in a variety of settings. History Pembroke Welsh and Cardigan Welsh corgis were both originally listed as one breed by The Kennel Club (UK) in 1925; the two varieties were officially recognized as distinct from one another by The Kennel Club by 1928, but were still categorized together under the title of "Welsh Corgis". In 1934, due to judge preferences towards each breed separately, the two breeds were finally described as uniquely differen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tricolor (dog)
The coat of the domestic dog refers to the hair that covers its body. Dogs demonstrate a wide range of coat colors, patterns, textures, and lengths. As with other mammals, a dog's fur has many uses, including thermoregulation and protection from cuts or scratches; furthermore, a dog's coat plays an important role in the Conformation show, showing of purebred dogs. Breed standards often include a detailed description of the nature and attributes of that breed's ideal coat. 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. 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 undercoat. The terms fur and hair are often used interchangeably when describing a dog's coat, however in general, a double coat, like that of the Newfoundland (dog), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Quarter Horse
The American Quarter Horse, or Quarter Horse, is an American breed of horse that excels at sprinting short distances. Its name is derived from its ability to outrun other horse breeds in races of or less; some have been clocked at speeds up to . The development of the Quarter Horse traces to the 1600s. The American Quarter Horse is the most popular breed in the United States, and the American Quarter Horse Association is the largest breed registry in the world, with almost three million living American Quarter Horses registered in 2014. The American Quarter Horse is well known both as a race horse and for its performance in rodeos, horse shows, and as a working ranch horse. The compact body of the American Quarter Horse is well suited for the intricate and quick maneuvers required in reining, cutting, working cow horse, barrel racing, calf roping, and other western riding events, especially those involving live cattle. The American Quarter Horse is also used in English ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chimerism
A genetic chimerism or chimera ( or ) is a single organism composed of cells of different genotype, genotypes. Animal chimeras can be produced by the fusion of two (or more) embryos. In plants and some animal chimeras, Mosaic (genetics), mosaicism involves distinct types of tissue that originated from the same zygote but differ due to mutation during ordinary cell division. Normally, genetic chimerism is not visible on casual inspection; however, it has been detected in the course of proving parentage. More practically, in agronomy, "chimera" indicates a plant or portion of a plant whose tissues are made up of two or more types of cells with different genetic makeup; it can derive from a bud mutation or, more rarely, at the grafting point, from the concrescence of cells of the two bionts; in this case it is commonly referred to as a "graft hybrid", although it is not a hybrid in the genetic sense of "hybrid". In contrast, an individual where each cell contains genetic materi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blaschko's Lines
Blaschko's lines, also called the lines of Blaschko, are lines of normal cell development in the skin. These lines are only visible in those with a mosaic skin condition or in chimeras where different cell lines contain different genes. These lines may express different amounts of melanin, or become visible due to a differing susceptibility to disease. In such individuals, they can become apparent as whorls, patches, streaks or lines in a linear or segmental distribution over the skin. They follow a ''V'' shape over the back, ''S''-shaped whirls over the chest and sides, and wavy shapes on the head. Not all mosaic skin conditions follow Blaschko's lines. The lines are believed to trace the migration of embryonic cells. They do not correspond to nervous, muscular, or lymphatic systems. The lines are not unique to humans and can be observed in other non-human animals with mosaicism. Alfred Blaschko is credited with the first demonstration of these lines in 1901. Signs and symp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Semidominant
In genetics, dominance is the phenomenon of one variant (allele) of a gene on a chromosome masking or overriding the effect of a different variant of the same gene on the other copy of the chromosome. The first variant is termed dominant and the second is called recessive. This state of having two different variants of the same gene on each chromosome is originally caused by a mutation in one of the genes, either new (''de novo'') or inherited. The terms autosomal dominant or autosomal recessive are used to describe gene variants on non-sex chromosomes (autosomes) and their associated traits, while those on sex chromosomes (allosomes) are termed X-linked dominant, X-linked recessive or Y-linked; these have an inheritance and presentation pattern that depends on the sex of both the parent and the child (see Sex linkage). Since there is only one Y chromosome, Y-linked traits cannot be dominant or recessive. Additionally, there are other forms of dominance, such as incomplete do ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
