What genes cause the Medicine Hat pattern - Page 2 - The Horse Forum

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post #11 of 14 Old 12-14-2012, 11:20 PM
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I'm not sure if it's a specific splash mutation that's involved with the deafness. I know Gunner is SW2. And Can't Hear Guns is a granddaughter of his.
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post #12 of 14 Old 12-15-2012, 01:16 AM
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SW2 does cause deafness. SW3 is rare and often found in combination with SW2. I don't think there is an official stand on whether SW3 *may* cause deafness on its own or if there just isn't a large enough population of only n/SW3's to say for sure.

SW1 does NOT cause deafness.
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post #13 of 14 Old 12-15-2012, 07:15 AM
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when I saw the first post about white causing deafness, my first thought was, "o lord another old wives tale," So I did some research, and surprise surprise, the hairs in the inner ear need pigment to work.
Based on a couple papers by Doctors or Doctorate students, No it isnt progressive, it either is or isnt deaf or partially deaf.
An affected horse or even a pair of affected horses arnt any more likely to throw a deaf horse than any other with the genes, Its all a matter of where the un pigmented hair ends up.
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post #14 of 14 Old 12-15-2012, 07:38 AM
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Quote:
Originally Posted by Joe4d View Post
when I saw the first post about white causing deafness, my first thought was, "o lord another old wives tale," So I did some research, and surprise surprise, the hairs in the inner ear need pigment to work.
Based on a couple papers by Doctors or Doctorate students, No it isnt progressive, it either is or isnt deaf or partially deaf.
An affected horse or even a pair of affected horses arnt any more likely to throw a deaf horse than any other with the genes, Its all a matter of where the un pigmented hair ends up.
I want to like this over and over. Because this represents my favourite quality in a person - a willingness to adapt your point of view and change how you think. Joe, we may not see eye to eye on everything, but right now, I am humbled by your willingness to better yourself
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