Parti Gene In Yorkies. When you get two such dogs, 25% of the offspring will have traditional yorkie colors , 50% of the offspring will also have traditional colors, but the puppies will carry this parti gene (that will stay recessive), and only 25% of the offspring will be parti. Parti colored yorkies are healthy animals and they are not a genetic freak of nature as some people, groups or websites suggest.
The parti color gene is a recessive trait so, in order to have parti yorkies in the litter, both parents must be carriers. A carrier will look like a traditional colored yorkie but is born with maybe some white on it's chin, chest and/or feet. The term “expressed” means you actually see the color.