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Tobiano
Tobiano is a spotted color pattern commonly seen in pinto horses, produced by a dominant gene. The tobiano gene produces white-haired, pink-skinned patches on a base coat color. The coloration is almost always present from birth and does not change throughout the horse's lifetime, unless the horse also carries the gray gene. It is a dominant gene, so any tobiano horse must have at least one parent who carries the tobiano gene. Other spotting patterns seen in pinto horses include frame overo, splashed white and sabino. In the United Kingdom, tobianos are frequently referred to as "coloured" or as "pied": piebald if black and white, skewbald if white and any base color other than black. Sometimes "painted" is also used. Bay and white tobiano horses are also referred to as tricoloured. Characteristics Tobiano traits generally include the following: * White legs from the hocks and knees down * White crossing the back between the withers and the dock of the tail * Whit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Overo
Overo refers to several genetically unrelated pinto coloration patterns of white-over-dark body markings in horses, and is a term used by the American Paint Horse Association to classify a set of pinto patterns that are not tobiano. ''Overo'' is a Spanish word, originally meaning "like an egg".''American Paint Horse Association's Guide to Coat Color Genetics'' American Paint Horse Association, 2007. Accessed August 19, 2008 The most common usage refers to frame overo, but and [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tricoloured (horse)
Tri-coloured (archaic: ''oddbald'') refers to a horse with three different coat colours in a pinto spotting pattern of large white and dark patches, usually bay (a reddish colour with a black mane and tail) and white. This colouring is also commonly called skewbald (referring to a horse with a spotted coat that is white and any colour other than black). In modern usage in British English, skewbald and piebald (black and white) horses are collectively referred to as ''coloured'', while in North American English, the term ''pinto'' is used to describe the colour pattern. The colour of the horse's skin underneath its coat alternates between dark or pink, depending on the dark or white overlying hair colour. Some animals also exhibit colouration of the irises of the eye that match the surrounding skin (blue eyes for white skin, brown for dark). The underlying genetic cause is related to a condition known as leucism. Genetically, a coloured horse begins with a solid base coat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Piebald
A piebald or pied animal is one that has a pattern of unpigmented spots (white) on a pigmented background of hair, feathers or scales. Thus a piebald black and white dog is a black dog with white spots. The animal's skin under the white background is not pigmented. Location of the unpigmented spots is dependent on the migration of melanoblasts (primordial pigment cells) from the neural crest to paired bilateral locations in the skin of the early embryo. The resulting pattern appears symmetrical only if melanoblasts migrate to both locations of a pair and proliferate to the same degree in both locations. The appearance of symmetry can be obliterated if the proliferation of the melanocytes (pigment cells) within the developing spots is so great that the sizes of the spots increase to the point that some of the spots merge, leaving only small areas of the white background among the spots and at the tips of the extremities. Animals with this pattern may include birds, cats, c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Skewbald
Skewbald is a colour pattern of horses. A skewbald horse has a coat made up of white patches on a non-black base coat, such as chestnut, bay, or any colour besides black coat. Skewbald horses which are bay and white (bay is a reddish-brown colour with black mane and tail) are sometimes called tricoloured. These horses usually have pink skin under white markings and dark skin under non-white areas. Other than colour, it is similar in appearance to the piebald pattern. Some animals also exhibit colouration of the irises of the eye that match the surrounding skin (blue eyes for white skin, brown for dark). The underlying genetic cause is related to a condition known as leucism. The term is also used to describe spotting patterns in various other animals, such as goats. Horses Terminology In British equestrian use, ''skewbald'' and ''piebald'' (black-and-white) are together known as ''coloured'', and the white markings are called ''patches''. In North American equestri ... [...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] |
Tovero
The Tovero (also known as Tobero) Retrieved on 13 January 2009 coloration is a mix of and colorations in s and s. The genetics of pinto coloration are not always fully understood, and some horses have a combination of patterns that does not fit cleanly in either category. Some charac ... [...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] |
Splashed White
Splashed white or splash is a horse coat color pattern in the " overo" group of spotting patterns that produces pink-skinned, white markings. Many splashed whites have very modest markings, while others have the distinctive "dipped in white paint" pattern. Blue eyes are a hallmark of the pattern, and splash may account for otherwise "solid" blue-eyed horses. Splashed white occurs in a variety of geographically divergent breeds, from Morgans in North America to Kathiawari horses in India. The splashed white pattern is also associated with Hearing impairment, congenital deafness, though most splashed whites have normal hearing. Splashed white can be caused by multiple variants across two different genes, for which genetic testing is available. Characteristics The splashed white pattern is characterized by the appearance of having been dipped, feet-first, into white paint. Blue eyes An eye is a sensory organ that allows an organism to perceive visual information. It dete ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Buckskin (horse)
Buckskin is a colour of horse (sometimes misunderstood as a breed). Buckskins coloring is a equine coat color, hair coat color referring to a color that resembles certain shades of tanned deerskin. Similar colors in some dog breed, breeds of dogs are also called buckskin. The horse has a tan or gold colored coat with black points (mane, tail, and lower legs). Buckskin occurs as a result of the cream gene, cream dilution gene acting on a bay (horse), bay horse. Therefore, a buckskin has the Melanocortin 1 receptor, Extension, or "black base coat" (E) gene, the agouti gene (A) gene (see bay (horse), bay for more on the agouti gene), which restricts the black (horse), black base coat to the points, and one copy of the cream gene (CCr), which lightens the red/brown color of the bay coat to a tan/gold. Buckskins should not be confused with dun (color), dun-colored horses, which have the dun gene, dun dilution gene, not the cream gene. Duns always have primitive markings (shoulder ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Regulatory Region
A regulatory sequence is a segment of a nucleic acid molecule which is capable of increasing or decreasing the expression of specific genes within an organism. Regulation of gene expression is an essential feature of all living organisms and viruses. Description In DNA, regulation of gene expression normally happens at the level of RNA biosynthesis ( transcription). It is accomplished through the sequence-specific binding of proteins (transcription factors) that activate or inhibit transcription. Transcription factors may act as activators, repressors, or both. Repressors often act by preventing RNA polymerase from forming a productive complex with the transcriptional initiation region ( promoter), while activators facilitate formation of a productive complex. Furthermore, DNA motifs have been shown to be predictive of epigenomic modifications, suggesting that transcription factors play a role in regulating the epigenome. In RNA, regulation may occur at the level of protein bi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
