The dun gene is a dilution gene that affects both red and black pigments in the coat color of a horse. The dun gene has the ability to affect the appearance of all black, bay, or chestnut ("red")-based horses to some degree by lightening the base body coat and suppressing the underlying base color to the mane, tail, legs and "primitive markings."
The classic Dun is a gray-gold or tan, characterized by a body color ranging from sandy yellow to red...
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The dun gene is a dilution gene that affects both red and black pigments in the coat color of a horse. The dun gene has the ability to affect the appearance of all black, bay, or chestnut ("red")-based horses to some degree by lightening the base body coat and suppressing the underlying base color to the mane, tail, legs and "primitive markings."
The classic Dun is a gray-gold or tan, characterized by a body color ranging from sandy yellow to reddish-brown. Dun horses always have a dark stripe down the middle of their back, a tail and mane darker than the body coat, and usually darker faces and legs. Other duns may appear a light yellowish shade, or a steel gray, depending on the underlying coat color genetics. Manes, tails, primitive markings and other dark areas are usually the shade of the non-diluted base coat color.
The dun allele is a simple dominant, so that the phenotype of a horse with either one copy or two copies of the gene is dun. It has a stronger effect than other...
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