[teenyelliott]

once you introduce the chocolate gene, you have a chance of having a Chocolate with the yellow gene, which gives you a "Dudley" - a yellow with a pink nose and eye rims

Well I'll be darned. Never heard of that, but apparently that is what my 8 year old Lab is. Her name is Penny, and she is a fantastic dog. Her mom was yellow and her dad waas black. They had twelve puppies, blacks, browns and yellows in the litter.

[AnAmericanMother]

Yep, that makes sense. The mom was chocolate factored, the dad is what we call "tri-factored" - carrying the genes for black, yellow, AND chocolate - with the yellow and chocolate both hidden by the dominant black.

Your Penny got a yellow (e) gene and a chocolate (b) gene from each parent, so she is a chocolate Lab with a yellow coat!

Whatever those show folks say, she is still a purebred, still a Lab, and can do anything performance-wise that any other Lab can do (except go in the show ring, but I've never had the slightest desire to go there and I don't think most people do. It's like watching paint dry, compared to running an agility course or hunting test or even the obedience ring).

And she's a cutie!