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Freemartin

A freemartin is defined as a female that is born as a twin with a male and is sterile as a result of exposure to masculinizing hormones.

Goat Scrapie Susceptibility

Scrapie is a fatal, infectious neurodegenerative prion disease that affects sheep and goats. Natural mutations in the prion protein gene of sheep and goats have been identified which confer susceptibility or resistance to scrapie.

Dominant White and White Spotting

White spotting patterns occur in many donkey breeds and are similar to those of horses in that the amount of white can range from a few white hairs to an animal that is almost completely white. Two variants have been identified in donkeys that contribute to white patterning (W and Wˢ).

AB Blood Group in Domestic Cat Breeds

The AB system is the major blood group system in domestic cats. The common blood types are A and B, and a third rare type "AB" is also known. This test detects the known genetic variants that produce B and AB blood types. When these variants are not detected, the cat is likely to have blood type A.

Albino

The feline albino mutation is a rare mutation that produces a white coat with blue eyes, and is recessive to the sepia and Siamese mutations.

Horse Embryo Pre-Implantation Genetic Diagnosis

Pre-implantation genetic diagnosis (PGD) is a procedure used to screen embryos recovered after uterine flush to determine sex and genetic traits through DNA testing prior to implantation in the uterus.

Tobiano

Tobiano is a white spotting pattern characterized by white on the body that crosses the topline.

Roan Zygosity Test

Roan is a white patterning coat color trait characterized by intermixed white and colored hairs in the body while the head, lower legs, mane, and tail remain colored.

Red Factor

The extension gene, or red factor, determines whether a horse will have a chestnut base coat color or a black or bay base coat color.