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Gray (horse)
A gray horse (or grey horse) has a Equine coat color, coat color characterized by progressive depigmentation of the colored hairs of the coat. Most gray horses have black skin and dark eyes; unlike some equine dilution genes and some other genes that lead to depigmentation, gray does not affect skin or eye color. Gray horses may be born any base color, depending on other color genes present. White hairs begin to appear at or shortly after birth and become progressively more prevalent as the horse ages as white hairs become intermingled with hairs of other colors. Graying can occur at different rates—very quickly on one horse and very slowly on another. As adults, most gray horses eventually become completely white, though some retain intermixed light and dark hairs. The stages of graying vary widely. Some horses develop a wikt:dapple, dappled pattern for a period of time, others resemble a roan (horse), roan with more uniform intermixing of light and dark hairs. As they age, ...
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Lipizzan
The Lipizzan or Lipizzaner (, , , , , , ) is a European horse breed, breed of riding horse developed in the Habsburg Empire in the sixteenth century. It is of Baroque horse, Baroque type, and is powerful, slow to mature and long-lived; the coat is usually gray (horse), gray. The name of the breed derives from that of the village of Lipica, Sežana, Lipica (), which was part of the Habsburg empire at the time the breed was developed, now in Slovenia, one of the earliest stud farms established; the stud farm there is still active. The breed has been endangered numerous times by warfare sweeping Europe, including during the War of the First Coalition, World War I, and World War II. The rescue of the Lipizzans during World War II by American troops was made famous by the Disney movie ''Miracle of the White Stallions''. The Lipizzaner is closely associated with the Spanish Riding School of Vienna, Austria, where the horses demonstrate the ''Classical dressage#The school jumps, ha ...
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Roan (horse)
Roan is a horse coat color pattern characterized by an even mixture of colored and white hairs on the body, while the head and "point coloration, points"—lower legs, Mane (horse), mane, and tail—are mostly solid-colored. Horses with roan coats have white hairs evenly intermingled throughout any other color. The head, legs, mane, and tail have fewer scattered white hairs or none at all. The roan pattern is Dominance (genetics), dominantly inherited, and is found in many horse breeds. While the specific mutation responsible for roan has not been exactly identified, a DNA test can determine zygosity for roan in several breeds. True roan is always present at birth, though it may be hard to see until after the foal coat sheds out. The coat may lighten or darken from winter to summer, but unlike the Gray (horse), gray coat color, which also begins with intermixed white and colored hairs, roans do not become progressively lighter in color as they age. The silvering effect of mi ...
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Foal
A foal is an equine up to one year old; this term is used mainly for horses, but can be used for donkeys. More specific terms are colt (horse), colt for a male foal and filly for a female foal, and are used until the horse is three or four. When the foal is nursing from its dam (mother), it may also be called a "suckling". After it has been weaned from its dam, it may be called a "weanling". When a mare is pregnant, she is said to be "in foal". When the mare gives birth, she is "foaling", and the impending birth is usually stated as "to foal". A newborn horse is "foaled". After a horse is one year old, it is no longer a foal, and is a "yearling (horse), yearling". There are no special age-related terms for young horses older than yearlings. When young horses reach breeding maturity, the terms change: a filly over three (four in horse racing) is called a mare, and a colt over three is called a stallion. A castrated male horse is called a gelding regardless of age; however, collo ...
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Appaloosa
The Appaloosa is an American horse breed best known for its colorful spotted coat pattern. There is a wide range of body types within the breed, stemming from the influence of multiple breeds of horses throughout its history. Each horse's color pattern is genetically the result of various spotting patterns overlaid on top of one of several recognized base coat colors. The color pattern of the Appaloosa is of interest to those who study equine coat color genetics, as it and several other physical characteristics are linked to the leopard complex mutation (LP). Appaloosas are prone to develop equine recurrent uveitis and congenital stationary night blindness; the latter has been linked to the leopard complex. Artwork depicting prehistoric horses with leopard spotting exists in prehistoric cave paintings in Europe. Images of domesticated horses with leopard spotting patterns appeared in artwork from Ancient Greece and Han dynasty China through the early modern period. In North ...
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Leopard Complex
The leopard complex is a group of genetically related Equine coat color, coat patterns in horses. These patterns range from progressive increases in interspersed white hair similar to Gray (horse), graying or Roan (horse), roan to distinctive, Dalmatian (dog), Dalmatian-like leopard (pattern), leopard spots on a white coat. Secondary characteristics associated with the leopard complex include a white sclera around the eye, striped horse hoof, hooves and mottling, mottled skin. The leopard complex gene is also linked to abnormalities in the eyes and vision. These patterns are most closely identified with the Appaloosa and Knabstrupper breeds, though its presence in breeds from Asia to western Europe has indicated that it is due to a very ancient mutation. Leopard complex patterns Coat patterns in the leopard complex range from being hardly distinguishable from an unaffected coat, to nearly pure white. Unlike most other Pinto horse, spotting patterns, the spotting and especially th ...
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Pinto Horse
A pinto horse has a coat color that consists of large patches of white and any other color. Pinto coloration is also called paint, particolored, or in nations that use British English, simply coloured. Pinto horses have been around since shortly after the domestication of the horse. Pinto colors can come in a number of genetically distinct patterns, which have different visual characteristics and tend to make white or leave colored different areas of the horse. These include tobiano, sabino, splashed white, frame, and manchado. A pinto horse may also have a combination of these patterns, such as tovero. Pinto patterns can be found in various breeds of horses, notably including the American Paint Horse. Color breed registries such as the Pinto Horse Association of America record pedigree and horse show results for pinto horses, regardless of ancestry. Both the terms "Pinto" and "Paint" may sometimes refer to breeds or registries rather than coat color. Pinto patterns are vi ...
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Alcock's Arabian
Alcock's Arabian (foaled about 1700, died about 1733), also known as Pelham Grey Arabian and less certainly as Bloody Buttocks and Ancaster Turk, among other names, is the ancestor of all grey-coloured Thoroughbred horses,Lady Wentworth, ''The Swift Runner: racing speed through the ages'' (G. Allen & Unwin, 1957), p. 27: "All grey thoroughbreds are descended in direct (though not exclusively male) line from the Grey Alcock Arabian, also known as the Brownlow Turk, Honeywood Arabian and Akaster Turk, the grey colour persisting through some 26 generations..." as well as grey sport and riding horses descended from Thoroughbred lines. Origins and career It was claimed in the 19th century that Sir Robert Sutton (1671–1746), English ambassador to the Ottoman Empire in Constantinople from 1700 to 1717, had acquired horses there, including Alcock's Arabian, the Holderness Turk, and the Brownlow Turk, and had had them shipped to England in 1704. However, there is no evidence that Alcoc ...
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Welsh Pony
The Welsh Pony and Cob is a group of four closelyrelated horse breeds including both pony and cob (horse), cob types, which originated in Wales. The four sections within the breed registry, breed society for the Welsh breeds are primarily distinguished by height, and also by variations in type: the smallest Welsh Mountain Pony (Section A); the slightly taller but refined Welsh Pony of riding type (Section B) popular as a children's show horse, show mount; the small but stocky Welsh Pony of Cob Type (Section C), popular for riding and competitive driving; and the tallest, the Welsh Cob (Section D), which can be ridden by adults. Welsh ponies and cobs in all sections are known for their good temperament, hardiness, and free-moving Horse gaits, gaits. Native ponies existed in Wales before 1600 BC, and a Welsh-type cob was known as early as the Middle Ages. They were influenced by the Arabian horse, and possibly also by the Thoroughbred and the Hackney (horse), Hackney horse. In 19 ...
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Boulonnais Horse
The Boulonnais, also known as the "White Marble Horse", is a draft horse breed. It is known for its large but elegant appearance and is usually gray (horse), gray, although chestnut (coat), chestnut and black (horse), black are also allowed by the French breed registry. Originally there were several sub-types, but they were crossbred until only one is seen today. The breed's origins trace to a period before the Crusades and, during the 17th century, Barb (horse), Spanish Barb, Arabian horse, Arabian, and Andalusian horse, Andalusian blood were added to create the modern type. During the early 1900s, the Boulonnais were imported in large numbers to the United States and were quite popular in France; however, the European population suffered severe decreases during 20th-century wars. The breed nearly became extinct following World War II, but rebounded in France in the 1970s as a popular breed for horse meat. Breed numbers remain low; it is estimated that fewer than 1,000 horses re ...
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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 ...
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Allele
An allele is a variant of the sequence of nucleotides at a particular location, or Locus (genetics), locus, on a DNA molecule. Alleles can differ at a single position through Single-nucleotide polymorphism, single nucleotide polymorphisms (SNP), but they can also have insertions and deletions of up to several thousand base pairs. Most alleles observed result in little or no change in the function or amount of the gene product(s) they code or regulate for. However, sometimes different alleles can result in different observable phenotypic traits, such as different pigmentation. A notable example of this is Gregor Mendel's discovery that the white and purple flower colors in pea plants were the result of a single gene with two alleles. Nearly all multicellular organisms have two sets of chromosomes at some point in their biological life cycle; that is, they are diploid. For a given locus, if the two chromosomes contain the same allele, they, and the organism, are homozygous with re ...
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