Pinto genes are genes that inhibit (refuses) colour in specific areas. Different genes depict which areas on the horse gets inhibited. Pinto patterns can result on any horse colour with or with out modifiers. There is a large range from very loud (lots of white) to very minimal versions of coats that are genetically tested to be the same and the reason behind this is currently unknown. It is known that a pinto pattern will generally be more bold on a red extension horse rather then a black one, it appears that it is easier to inhibited red pigment then it is to inhibit black pigment. This doesn’t mean that there are not some very loud black based pintos out there, it is likely that there are other genetic factors that are currently not known that result in these bold black based pintos.
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