Bay coat color in horses is identified by a red-brown body color with black "points" (legs, mane, tail). The color is determined by two major genes - one called "Extension" that codes for basic black body color and another called "Agouti" that restricts that black pigment to the horse's points and leaves the body a brown or red color. However, other genes may modify the shade of the body color so that it appears quite light (almost yellow) or quite dark (almost black), and still more genes may be responsible for white markings, such as the connected star and strip seen on the face of this Oldenburg mare.

Bay coat color

Credit: Rebecca K. Splan

Digital Credit: Rebecca K. Splan

Publisher: None

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Description: Bay coat color in horses is identified by a red-brown body color with black "points" (legs, mane, tail). The color is determined by two major genes - one called "Extension" that codes for basic black body color and another called "Agouti" that restricts that black pigment to the horse's points and leaves the body a brown or red color. However, other genes may modify the shade of the body color so that it appears quite light (almost yellow) or quite dark (almost black), and still more genes may be responsible for white markings, such as the connected star and strip seen on the face of this Oldenburg mare.

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