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Post by Snowfrost on Aug 12, 2011 9:07:43 GMT -5
The Extension gene, or 'E', is what makes our horses black. The Extension gene darkens the pigments in a horse's coat. Black, E, or Extension, is one of the two base coats to all horses. Without the Extension gene, we wouldn't have nearly as many colors! EE = Homozygous. This means that this horse does not carry the Agouti, or "red factor". Basically, this horse cannot make chestnuts. Ever. With anyone. No matter what. You will never get a chestnut horse out of a homozygous horse -- nor its dilutes or other relatives. The lightest thing you can get from this horse is a bay. Ee = Heterozygous. This means that the horse does carry the "red factor". Basically, when he's paired up with another horse who holds an Agouti (or another hetero black), there's a chance you can get a chestnuts (and its relatives) out of it. EE horses also tend to be 'true black', or 'raven black' (or whatever other kind of name they give them anymore). This means that they tend not to fade in the sunlight, and the tint on their fur can sometimes be blue. Ee horses tend to have coats that fade to give a reddish tinge to their coats whenever they're out in the sunlight all of the time, and their manes and tails can sometimes be bleached. This is because of the red factor in their genes.
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