POSSIBLE COLOR GENOTYPES
Introduction
The Basics
What Makes Grey (G)
What Makes Black (E)
What Makes Bay or Chestnut (A)
Possible Color Genotypes
Possible Color Genotypes/Black & Black-to-Grey
Possible Color Genotypes/Bay & Bay-to Grey
Possible Color Genotypes/Chestnut & Chestnut-to-Grey
Sample Matings
Glossary of Terms Conclusion Return to HOME
In this section, the various color genotypes for each color will be addressed, including the foal coat for that color. Then after the main color is discussed, that same color as a foal base coat of a grey horse will be discussed.
The color geneotype is usually written listing the alleles for silvering (Grey) first, then the Agouti alleles, and finally, the Extention alleles. If an allele is known to be dominant, it is written first--before a recessive allele for the same trait. (It does not matter which parent contributes that allele.) Example: GgAaEe. If both alleles are dominant or both are recessive, they are both written. Examples: GGaaee, ggAAee, ggaaEE, GGAAee, GGaaEE, ggAAEE, or GGAAEE. Most often there is a mix of dominant and recessive alleles. Example: GgaaEE, ggAaEE, ggAAEe. Sometimes alleles(s) may be unknown--for our purposes, those alleles are replaced with a "?" in place of the letter in the Color Genotype found in the right colomn of the Individual Horse Pages. Examples: gg?aee (a chestnut that may have a dominant Agouti allele), Gg???? (a grey whose base foal coat is unknown), ggaaE? (a black that may have received the E allele from both parents), and so on. The following sections will address each color separately.
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Special Note for Registration: When drawing any white markings on the registration application, draw them very carefully. The white/pink area on the head and face does not usually get much larger as the head grows. Imagine the head as full-grown and then draw the markings somewhat smaller than they are on a foal's head and face.
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Possible Color Genotypes
Possible Color Genotypes/Black & Black-to-Grey
Possible Color Genotypes/Bay & Bay-to-Grey