What genes cause the Medicine Hat pattern

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What genes cause the Medicine Hat pattern

This is a discussion on What genes cause the Medicine Hat pattern within the Horse Colors and Genetics forums, part of the Horse Breeds, Breeding, and Genetics category

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    12-13-2012, 02:19 PM
What genes cause the Medicine Hat pattern

I have 3 Medicine Hat patterned horses, I curious to what patterns cause it.
One is a Paint mare Tru Painted Indian Paint
The Paint mare does have Frame Overos in her history.
The other two are grade Pintos with unknown backgrounds, the mare was a rescue that came bred. The Paint has 2 blue eyes, the Pinto mare has one blue eye and the colt has 2 blue eyes.
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File Type: jpg medicine hats 011.jpg (33.0 KB, 172 views)
File Type: jpg medicine hats 008.jpg (20.6 KB, 166 views)
File Type: jpg medicine hats 004.jpg (32.0 KB, 163 views)
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File Type: jpg lindiesboy 004.jpg (36.5 KB, 163 views)
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    12-13-2012, 02:23 PM
Tobiano, splash, frame and sabino in various combinations can cause the medicine hat appearance.
    12-13-2012, 07:33 PM
Is the horse in the first few pictures deaf, by chance? She's got a lot of white on her ears.

Like NdAppy said, most medicine hats are a combination of genes expressed loudly. The ears tend to be very last to have white cover them because the lack of pigment causes deafness.
    12-13-2012, 11:42 PM
No she is not deaf she responds to voice commands and to noises around her she knows her name and comes when called. Is the deafness a progressive thing or are they born that way. I have heard of blindness in the overo pattern, none of my horses appear blind or deaf.
    12-13-2012, 11:54 PM
No. I would assume it is an evolutionary aspect that ears are one of the last places to lose pigment because the lack of pigment on the ears causes deafness and I can't imagine a deaf horse lasting very long when a predator is around.

For example, this is a mare named Can't Hear Guns. She is a maximum splash. I can't remember if she's positive for all 3 mutations or just two. Either way, she is genetically a bay. Her name is because the splash covered her entire body, including her ears, causing deafness.
    12-14-2012, 09:26 AM
What is needed is the pigment inside of the inner ear. Gunner (Colonels Smoking Gun) is also deaf. He has pigment on his out ears, but not where it is needed on the inner ear.

    12-14-2012, 10:00 AM
Hah he looks like he got dunked in paint. Awesome coloring!

(Now I need to know how they get his tail so white)
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    12-14-2012, 12:42 PM
So he has pink skin in his inner ear NdAppy?
    12-14-2012, 02:05 PM
Wow! What a cool looking horse. I'm no color / genetics guru. BUT it says that horse is a stud and if he's deaf is there any way possible he can pass it on? Forgive gurus if it's an easy answer, just curious!
    12-14-2012, 02:24 PM
From what I remember, splash is associated with congenital deafness- most horses with splash have normal hearing, though. Assuming his deafness is associated with his splash pattern, I'd guess that he has no more chance of passing along deafness than any other horse carrying splash. I'm not 100% sure on that, so someone please correct me if that's wrong
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