Recently, mutations associated with the polled phenotype have been found in cattle breeds of European origin. The polled phenotype is dominant, so that a polled animal can have 1 or 2 copies of the gene. All offspring of a bull with 2 copies of the polled gene (homozygous) will be polled, but if the bull has only 1 copy of the gene (heterozygous) it will be a carrier of the horned gene. The genetic study determines whether an animal has 1 or 2 copies of the polled gene.

Disease detection

Hypotrichosis (HYF) and (HYC)

Diluted coat color (DLF) and (DLC)

Idiopathic epilepsy (IEF) and (IEC)

Maple Syrup (MSUDF) and (MSUDC).

Mandibulofacial (MDF) and (MDC).

Genexa has developed the test to determine the different hereditary diseases recommended by the American Hereford Association.