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Post by Snowfrost on Aug 13, 2011 3:58:48 GMT -5
One of the most common colors for horses today, the bay coat is created when both an Extension 'E' and Agouti 'A' are present. The types of agouti Alleles ('shade modifiers') present depict the shade of bay your horse has. So, with this in mind, you should be able to use the information from the first thread to identify the type of bay you would like your horse to be. Since Agouti restricts the amount of black on a horse (usually only to the points of the legs and head), the rest of the body is like a darker, duller shade of chestnut.
Now, on bay horses, the + is dominant over all alleles. The second dominant of them is A (which, remember, reddens a horse's coat), which means that this coat will be more likely to appear than the others. These are the most likely alleles to be used for a horse to be bay. A horse with a or t will make a horse brown (more on this in the next section). However, so long as the two alleles are not dominant (first on the code for the agouti), you will result in having a dark bay ("black bay", or whatever other names they are sometimes given). + can also be called 'wild-type' because it limits the intensity of the black points in a bay. This means that the points on the legs (and in the tail) will be lighter than on a horse without the 'wild-type' allele. Obviously if you add two + alleles, the 'wild-type' will be stronger than if you only had one. Remember that you can combine alleles to make certain shades and types (I won't go over all of them -- that's what the first thread is there for, and I don't really like feeling redundant). If you need help, remember that you can always ask.
As with most bases, Heterozygous and Homozygous have little to no affect on the coat's actual color. The examples below are Hetero, simply because I felt like it:
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