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White (horse)
A white horse is born predominantly white and stays white throughout its life. A white horse has mostly pink skin under its hair coat, and may have brown, blue, or hazel eyes. "True white" horses, especially those that carry one of the dominant white (''W'') genes, are rare. Most horses that are commonly referred to as "white" are actually "gray" horses whose hair coats are completely white. Gray horses may be born of any color and their hairs gradually turn white as time goes by and take on a white appearance. Nearly all gray horses have dark skin, except under any white markings present at birth. Skin color is the most common method for an observer to distinguish between mature white and gray horses. True white horses White horses have unpigmented skin and a white hair coat. Many white horses have dark eyes, though some have blue eyes. In contrast to gray horses which are born with pigmented skin they keep for life and pigmented hair that lightens to white with age, truly wh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dominant White
Dominant white (W) is a group of genetics, genetically related coat color alleles on the KIT (gene), KIT gene of the horse, best known for producing an White (horse), all-white coat, but also able to produce various forms of Pinto horse, white spotting, as well as bold Horse markings, white markings. Prior to the discovery of the W allelic series, many of these patterns were described by the term Sabino horse, sabino, which is still used by some breed registry, breed registries. White-colored horses are born with unpigmented pink skin and white hair, usually with dark eyes. Under normal conditions, at least one parent must be dominant white to produce dominant white offspring. However, most of the currently-known alleles can be linked to a documented spontaneous mutation that began with a single ancestor born of non-dominant white parents. Horses that exhibit white spotting will have pink skin under the white markings, but usually have dark skin beneath any dark hair. There are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sabino Horse
file:Sabino-Pinto-Puerto-Rican-Paso-Fino.jpg, A sabino horse with extensive roaning Sabino describes a distinct pattern of white spotting in horses. In general, Sabino patterning is visually recognized by roaning or irregular edges of horse markings, white markings, belly spots, white extending past the eyes or onto the chin, white above the knees or hocks, and "splash" or "lacy" marks anywhere on the body. Some sabinos have patches of roan (horse), roan patterning on part of the body, especially the barrel and flanks. Some sabinos may have a dark leg or two, but many have four white legs. Sabino patterns may range from slightly bold face or leg horse markings, white markings—as little as white on the chin or lower lip—to horses that are fully white. The known causes of the sabino patterns are the SB-1 allele and several other dominant white#Allelic_series, dominant white (W) alleles on the KIT (gene), ''KIT'' gene. The genetics behind some types of sabino, such as that fou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shetland Pony
The Shetland pony or Sheltie is a Scottish breed of pony originating in the Shetland Islands in the north of Scotland. It may stand up to at the withers. It has a heavy coat and short legs, is strong for its size, and is used for riding, driving, and pack purposes. History Shetland ponies originated in the Shetland Islands, located northeast of mainland Scotland. Small horses have been kept in the Shetland Islands since the Bronze Age. People who lived on the islands probably later crossed the native stock with ponies imported by Norse settlers. Shetland ponies were probably also influenced by the Celtic pony, brought to the islands by settlers between 2000 and 1000 BC. The harsh climate and scarce food developed the ponies into extremely hardy animals. Shetland ponies were first used for pulling carts and for carrying peat, seaweed, and ploughing land. Then, as the Industrial Revolution increased the need for coal in the mid-nineteenth century, thousands of Shetland p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mustang (horse)
The mustang is a free-roaming horse of the Western United States, descended from horses brought to the Americas by the Spanish conquistadors. Mustangs are often referred to as wild horses, but because they are descended from once-domesticated animals, they are actually feral horses. The original mustangs were Colonial Spanish horses, but many other breeds and types of horses contributed to the modern mustang, now resulting in varying phenotypes. Some free-roaming horses are relatively unchanged from the original Spanish stock, most strongly represented in the most isolated populations. In 1971, the United States Congress recognized that "wild free-roaming horses and burros are living symbols of the historic and pioneer spirit of the West, which continue to contribute to the diversity of life forms within the Nation and enrich the lives of the American people." The free-roaming horse population is managed and protected by the U.S. Bureau of Land Management (BLM). Controve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Missouri Fox Trotter
The Missouri Fox Trotter is a horse breed that originated in the state of Missouri in the United States. It was developed in the Ozark Mountains by settlers in the early 19th century, and quickly developed into a gaited breed appreciated for its stock horse abilities, stamina and smooth gaits. It performs an ambling gait known as the "fox trot", a four-beat broken diagonal gait in which the front foot of the diagonal pair lands before the hind, eliminating the moment of suspension and increasing smoothness. The main breed registry was begun in 1948 and as of 2012 registers almost 100,000 horses. A European registry was begun in 1992, and as of 2009 recognizes around 600 Fox Trotters living in Europe. In 2006, a smaller registry, focused on the preservation of the original, historic type, was begun in the United States. The Fox Trotter is a mid-sized, muscular breed, used mainly for trail riding and ranch work. Breed characteristics Missouri Fox Trotters stand high, and weigh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tennessee Walker
The Tennessee Walking Horse or Tennessee Walker is a breed of gaited horse known for its unique four-beat running-walk and flashy movement. It was originally developed as a riding horse on farms and plantations in the American South. It is a popular riding horse due to its calm disposition, smooth gaits and sure-footedness. The Tennessee Walking Horse is often seen in the show ring, but is also popular as a pleasure and trail riding horse using both English and Western equipment. Tennessee Walkers are also seen in movies, television, and other entertainment. The breed was developed beginning in the late 18th century when Narragansett Pacers and Canadian Pacers from the eastern United States were crossed with gaited Spanish Mustangs from Texas. Other breeds were later added, and in 1886 a foal named Black Allan was born. He is now considered the foundation sire of the breed. In 1935 the Tennessee Walking Horse Breeders' Association was formed, and it closed the studbook i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Paint Horse
The American Paint Horse is a breed of horse that combines both the conformational characteristics of a western riding, western stock horse with a pinto horse, pinto spotting pattern of white and dark equine coat color, coat colors. Developed from a base of spotted horses with American Quarter Horse, Quarter Horse and Thoroughbred bloodlines, the American Paint Horse Association (APHA) breed registry is now one of the largest in North America. The registry allows some non-spotted animals to be registered as "Solid Paint Bred" and considers the American Paint Horse to be a horse breed with distinct characteristics, not merely a color breed. Registration The American Paint Horse's combination of color and conformation has made the American Paint Horse Association (APHA) the second-largest breed registry in the United States. While the colorful coat pattern is essential to the identity of the breed, American Paint Horses have strict bloodline requirements and a distinctive stock-h ... [...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] |
Miniature Horse
A miniature horse is a breed or type of horse characterised by its small size. Usually it has been bred to display in miniature the physical characteristics of a full-sized horse, but to be little over in height, or even less. Although such horses have the appearance of small horses, they are genetically much more similar to pony breeds such as the Shetland. They have various colors and coat patterns. Miniature horses are present in several countries, including Argentina, Australia, France, Germany, the Netherlands, Ireland, Namibia, the Philippines, the United Kingdom and the United States. In some countries they have the status of a breed; these include the Falabella of Argentina, the Dutch Miniature or , the South African Miniature Horse and the American Miniature Horse. They are commonly kept as companion animals, or for sporting activities such as driving or other competitive horse show events. A few have been trained as guide horses for blind people. History Minia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Locus (genetics)
In genetics, a locus (: loci) is a specific, fixed position on a chromosome where a particular gene or genetic marker is located. Each chromosome carries many genes, with each gene occupying a different position or locus; in humans, the total number of Human genome#Coding sequences (protein-coding genes), protein-coding genes in a complete haploid set of 23 chromosomes is estimated at 19,000–20,000. Genes may possess multiple variants known as alleles, and an allele may also be said to reside at a particular locus. Diploid and polyploid cells whose chromosomes have the same allele at a given locus are called homozygote, homozygous with respect to that locus, while those that have different alleles at a given locus are called heterozygote, heterozygous. The ordered list of loci known for a particular genome is called a gene map. Gene mapping is the process of determining the specific locus or loci responsible for producing a particular phenotype or biological trait. Association ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Homozygous
Zygosity (the noun, zygote, is from the Greek "yoked," from "yoke") () is the degree to which both copies of a chromosome or gene have the same genetic sequence. In other words, it is the degree of similarity of the alleles in an organism. Most eukaryotes have two matching sets of chromosomes; that is, they are diploid. Diploid organisms have the same loci on each of their two sets of homologous chromosomes except that the sequences at these loci may differ between the two chromosomes in a matching pair and that a few chromosomes may be mismatched as part of a chromosomal sex-determination system. If both alleles of a diploid organism are the same, the organism is homozygous at that locus. If they are different, the organism is heterozygous at that locus. If one allele is missing, it is hemizygous, and, if both alleles are missing, it is nullizygous. The DNA sequence of a gene often varies from one individual to another. These gene variants are called alleles. While some ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sunburn
Sunburn is a form of radiation burn that affects living tissue, such as skin, that results from an overexposure to ultraviolet (UV) radiation, usually from the Sun. Common symptoms in humans and other animals include red or reddish skin that is hot to the touch or painful, general fatigue, and mild dizziness. Other symptoms include blistering, peeling skin, swelling, itching, and nausea. Excessive UV radiation is the leading cause of (primarily) non-malignant skin tumors,World Health Organization, International Agency for Research on Cance"Do sunscreens prevent skin cancer" Press release No. 132, 5 June 2000World Health Organization, International Agency for Research on Cance"Solar and ultraviolet radiation" IARC Monographs on the Evaluation of Carcinogenic Risks to Humans, Volume 55, November 1997 which in extreme cases can be life-threatening. Sunburn is an inflammatory response in the tissue triggered by direct DNA damage by UV radiation. When the cells' DNA is ov ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
