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Lexington (March 17, 1850 – July 1, 1875) was a United States Thoroughbred race horse who won six of his seven race starts. Perhaps his greatest fame, however, came as the most successful sire of the second half of the nineteenth century; he was the leading sire in North America 16 times, and broodmare sire of many notable racehorses.
Dun gene. A bay dun, also called a "classic" or "zebra" dun. A “blue” dun, or grullo. A red dun. The dun gene is a dilution gene that affects both red and black pigments in the coat color of a horse. The dun gene lightens most of the body while leaving the mane, tail, legs, and primitive markings the shade of the undiluted base coat color.
The X factor theory proposes that a mutation within a gene located on the X chromosome of horses causes a larger-than-average heart. A larger-than average heart was documented in certain high-performance Thoroughbred , Quarter Horse , and Standardbred racehorses .
Equine coat color genetics determine a horse 's coat color. Many colors are possible, but all variations are produced by changes in only a few genes. Bay is the most common color of horse, [ 2] followed by black and chestnut. A change at the agouti locus is capable of turning bay to black, while a mutation at the extension locus can turn bay or ...
A cave painting of a wild horse, Lascaux. The dun coat and attendant primitive or "dun factor" markings reflect the wild type coat and are observed in all equine species. [3] Some cave paintings depict horses as being dun and with the primitive markings. The Przewalski's horse is dun-colored with primitive markings.
Eclipse. Eclipse (1 April 1764 – 26 February 1789) was an undefeated 18th-century British Thoroughbred racehorse who won 18 races, including 11 King's Plates. He raced before the introduction of the British Classic Races, at a time when four-mile heat racing was the norm. He was considered the greatest racehorse of his time and the expression ...
Sham (horse) Sham (April 9, 1970 – April 3, 1993) was an American thoroughbred race horse and leading three year-old in 1973, who was overshadowed by his more famous peer, Secretariat. Sham was dark bay, almost black in color. He raced in the green and yellow silks of his owners, Sigmund and Viola Sommer, with matching blinkers.
Justify (born in March 28, 2015) is a US Hall of Fame Thoroughbred racehorse who is known for being the thirteenth winner of the American Triple Crown. He also was the first horse since Apollo in 1882 to win the Kentucky Derby without racing as a two-year-old. Justify first attracted attention with a win in his debut race on February 18, 2018.