A Digression on Dog Genetics, Part 2

eye_chart
Here’s Carlton, really wanting to get out of the doctor’s office. This photo is the best one to show he has pale tan ears.

Yesterday, I shared some information on Carlton the puppy’s “weird eyes.” Today I’d like to document some of the things I learned about how he got to be “the world’s whitest dog.” (And, FYI he weighs 31 pounds now, which makes me think he will probably end up the size of his companions Brody and Harvey, though perhaps less bulky.)

I think that he has a whammo combination of THREE genes that make him pale. I learned a lot, thanks to a great collection of information on dog color genetics by Jess Chappell for a lot of this, along with the doggie eye problem reading I did from the veterinary opthalmomogist’s textbook (see references).

Carlton is not an albino

Nope, he is not an albino. Albinism is not found often in dogs like it is in bunnies, rats, and humans. There are a LOT of genes that can make a dog white, though. I won’t go into detail (you can read it in the links below), but I’ll share some ideas.

Is he a double merle?

At least two veterinarians who have examined Carlton have posited that his coloring is due to being a double merle. What’s that, you ask?

merle
This is a cute little merle dachsund named Maggie, owned by my friend Mandi.

First, merle is a beautiful pattern that occurs in a number of dog breeds (I list some at the end of this article). The base color of the coat is beautifully dappled, and people like it a lot. It will show up if just one parent has the gene (it’s dominant).

Continue reading “A Digression on Dog Genetics, Part 2”

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