Extension Locus · MC1R gene · Gelb-Faktor · Yellow-Red Coat Color · Extension-Lokus · MC1R-Gen · Melanocortin-1-Rezeptor · Recessive Yellow · E Locus · MC1R
The Extension locus, also known as the E Locus or MC1R gene, is a genetic location that controls pigment production in a dog's hair follicles and skin. It acts as a biological switch, determining whether the body produces dark pigment, called eumelanin, or yellow-to-red pigment, called pheomelanin. This is a normal genetic variation that influences physical appearance rather than a medical disease.
This trait is visible from birth, causing dogs with two copies of the recessive variant to display a yellow, red, or cream-colored coat. It does not cause any physical symptoms, health issues, or clinical signs of illness.
No medical treatment or intervention is necessary, as this is a completely harmless coat color variation. There are no associated veterinary costs, resulting in a lifetime cost of 0 EUR.
More conditions affecting the Skin & coat.
Estimated range of typical treatment cost. Actual cost depends on severity, clinic and region.