Equine Genetics

E(Extension) --E is the gene that control the base color of the horse. E is black and e is red(chestnut). E is dominant over e so if you hav...

Extension is the gene that controls whether a horse is black based (E) or red based (e), the only two colors that are true base colors. Ever...

This post covers agouti, the gene that makes a black horse into a bay. Agouti is dominant, meaning you only need one copy for it to express ...

The cream gene (CR) is the gene that creates palominos, buckskins, smoky blacks, cremellos, perlinos, and smoky its. It is an incomplete dom...

Gray (G) is a color modifying gene. It is also a dominant gene, which means one parent must be gray in order for the foal to be gray. Two no...

Tobiano (TO) is a dominant gene. If tobiano is there it will express. Tobiano tends to create smooth round white patches on a horse. It a...

Since Frame Overo is the pattern most people think of when they hear the word "Overo" I think this is the perfect point in time to...

Sabino(SB) is an incomplete dominant gene, like Frame Overo and Cream. In Sabino's heterozygous form it creates minimal to normal white ...

Dominant White ( DW ) is a dominant gene. It is also believed to be EMBRYONIC lethal in its homozygous form. Meaning the homozygous foal is ...