Homozygous question!
 

Is it possible for a horse to be homozygous for different overo genes? Like splash or the others who's name escapes me? Obviously not frame lol.

Pictures would be nice too:P
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I dont see why not. Although i personally have never seen a homozygous splash or sabino horse.

Sabino, splash and frame are the 3 overo genes.

Frame you know, in its homozygous form is fatal 100% of the time.
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CCH on here owns a horse that is homozygous for splash CLa. I know there are more out there now that we have some splash tests. :-)

NDAppy, your right! Do you know if Gunner is homozygous for splash? I believe he is deaf too. Are homozygous splash horses more prone to deafness do you know?

Im sure there are quite a few out there. But i never see anything advertised as "homozygous for the splash/sabino gene" its always for tobiano.. ;-)
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If being homozygous-dominant isn't fatal (as is the case with frame overo) then I don't see why horses wouldn't be able to be homozygous-dominant for multiple patterns.

If you bred a SbSb Spsp horse with a Sbsb SpSp horse, you could theoretically come out with any Sb- Sp- foal, including homozygous-dominant for both.

I don't believe that there has been much advertising about it yet as the test is still so "new" so to speak.

I believe that the Gunner line is SW2 carriers, and it is beleived that SW2 is embryonic lethal.

Like I said...IF being homozygous-dominant isn't lethal...

:wink: when I typed out my response your post wasn't there.

SW1 can and is homozygous. SW2 and SW3 are thought at this time to be embryonic lethal.

That's odd cause your post was 6 minutes after mine. I seem to have a few forum issues XD

I had the screen open for a while as I got side tracked with my kids. :-)