Homozygous Roan Lethal? - Page 3

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Homozygous Roan Lethal?

This is a discussion on Homozygous Roan Lethal? within the Horse Colors and Genetics forums, part of the Horse Breeds, Breeding, and Genetics category
  • Blue raon pics horse
  • Homozygous roan

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    08-21-2012, 10:00 AM
Lol. No, I don't treat my students that way. I have, however, had teachers that did..........
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    08-21-2012, 10:58 AM
This guy use to belong to a friend of mine. She sold him to a breeder down near Austin. He's tested RnRn, throws 100% roans. Hat Creek Shane Quarter Horse
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File Type: jpg Shane.jpg (20.4 KB, 100 views)
HorseLovinLady likes this.
    08-21-2012, 04:08 PM
Alright, I sent her an email, hopefully I'll get a nice reply back!

On a side note, I'm having trouble with a Dominant White foal picture.

I still struggle a bit with some. It's obviously Ww but what about E and A (agouti)? I think I see some chestnut on the ears...is it safe to say that this is ee aa? And would you name this a Dominant White Chestnut?
    08-21-2012, 04:29 PM
I would have to put him down as red based, with agouti unknown. You can't tell agouti status of a horse except in a very, very few cases.
    08-21-2012, 04:59 PM
Another Homozygous Roan Stud

Here is a Tennesse walking horse stud that is a homozygous roan. His raon zygosity test is Rn/Rn.

Homozygous Blue Roan Tennesssee Walking horse, Generator's DR Blue,
    08-21-2012, 05:53 PM
Originally Posted by Bridgertrot    
Yeah that's why I'm asking. I pretty much did this when I read it:


I need some of the other color smarties so that if this is indeed incorrect (like I feel that it is) I can go to my professor and be like "Y .U NO TEACH RIGHT?!"
I want to note my enjoyment of Snape reference.
Bridgertrot likes this.
    08-21-2012, 06:01 PM
Originally Posted by Chiilaa    

I really have nothing to add except I'm DROOLING over this horse!!!!
    08-21-2012, 06:48 PM
Originally Posted by NdAppy    
I would have to put him down as red based, with agouti unknown. You can't tell agouti status of a horse except in a very, very few cases.
Agouti meaning he may or may not be bay as well right? Because horses with dark points need to be at least AA or Aa right?

Just trying to do well in this assignment and learn some things! Lol
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    08-21-2012, 07:05 PM
Agouti is the bay/brown/wild bay modification. A red based horse can carry the modification but will not show it. It only affects black horses.

There are only two base colors in horses. Black and red. Everything else is a modification of those two colors.
    08-21-2012, 07:07 PM
Wix.com Equine Color Genetics created by ruffriderdesign based on Close Up | Wix.com
Celeste and PhelanVelvel like this.

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