Color Genetics


BE AWARE!!! We would like to take this time to tell you what some breeders are doing and please contact AKC regarding this if you see this. Some breeders are passing a Blue Merle Yorkshire Terrier off as a purebred which may be called Blueberry or Raspberry colors. These are not purebreds and if they are selling it as a designer (MIX) dog then no worries. The way you can tell that it is a Blue Merle it may have blue eyes, but not always. It will have black spots with blue all over the body and tan maybe on the head, legs and spots on the body rather than black throughout the coat. On the black puppy as the puppy gets older the black coats will start to grow out blue with may be some black hair throughout the coat, but never in patches. Merle is not in the genetics of Yorkies! You find this gene in your toy breed such as Chihuahua or Pomeranian and maybe others. But the Blue Merle is a mix not purebred. AKC will be happy to tell you how to send them the info they need on the breeder.

Those of you that plan to breed Yorkshire Terriers (Yorkies) for certain colors, it is very important to understand the colors in which you choose or you can create the worst of colors and possibly health problems along the way.

This recessive & diluted gene makes up a very small number in the Yorkshire Terriers (Yorkies) background. In starting out your breeding program for the colors it is essential to choose the right genetics that dominate the characteristics. Plus along with this comes health, well balance, sound structured and temperaments. When we are breeding for these colors we should all strive to preserve the quality of the breed.

Wishing you the best in your breeding program!!!


Here are some links below on genetic coat colors: it doesn't matter what the studies are on, cats, rats, horses, other dogs, etc. the color genetics are the same based on codes.

Understanding coat colors:

The Basics on Canine Coat Colors:

Canine Chinchilla Dilution gene:

This link below will tell you about Blue born

color genetics:



You can test for colors at these 2 labs: