HorseQuest Learning Lesson: Equine Genetics: An Important Diagnostic Tool

Two horse heads

Horses have approximately 20,000 different genes. Each horse has two copies of every gene; one is received from the sire (male) and the other is received from the dam (female). The combination of genes that a horse has is referred to as its genotype. The characteristic that we see, such as coat color, is a result of the horse’s genotype and we refer to these characteristics as the horse’s phenotype. Some diseases are also a result of the horse’s genotype. …