C: also a dilution gene, sometimes called the “palomino dilution”.A gene pair of dd will not affect the base color. D (dominant) will dilute black/dark seal brown to grulla also will dilute bay/light seal brown to dun also will dilute chestnut to red dun. D: a dilution gene, sometimes called the “dominant dilution”.Alleles at the A locus have an unknown or unnoticeable effect on chestnut color. A horse with an Aa gene pair would be a bay an at a gene pair would be dark brown and an aa gene pair would be black. A (dominant) is the allele for restricting black color to the legs, mane, and tail, thus creating bay at (recessive modified) does not restrict the black quite so much, resulting in a dark brown or seal brown horse and a (recessive) does not affect black at all. An Ee gene pair would be black an ee would be chestnut. E: E (dominant) is the allele for black coat color e (recessive) is for chestnut.

In horses, the major loci for color are E, A, D, C, and W. If both genes are recessive, the recessive trait is expressed. If a dominant gene is present in the pair, the trait that is associated with it will be expressed. If both alleles are recessive ( bb), the gene pair is homozygous recessive, or simply recessive. If one dominant and one recessive allele is present ( Bb), the gene pair is heterozygous, and the dominant gene is expressed. BB), the gene pair is homozygous dominant. If two dominant alleles are present (i.e. “Alleles” are the two variations of a gene: a recessive or a dominant gene. Other Modifying Loci of Horse Color GenesĪ “locus” is a location on a chromosome for two genes.

Is re or why d coat sominont in horses