Red Gened Filly out of Two Black Gene Parents?

My neighbors Buckskin Rocky Mountain Saddle Horse mare just had her baby on Saturday night. This mare was bred to a Chocolate Stallion. I believe that horses chocolate in color are black gened, so this is where it gets interesting. The filly is red in color. She looks alot like a light chestnut, but I know that chestnut is a part of the red gene pool. Anybody know what color this filly is going to turn out to be or what's going on with her genetics?

Red Gened Filly out of Two Black Gene Parents?
This could also just be the 'foal coat' and will shed out to the dark color. I've seen 'light sorrel' babies shed out to bays, palominos, and shades of browns.
Reply:Of course! Every black horse has two parts to it's coat color, either a BB (two black genes), or a Bb (Black and red genes). black is dominant, so even if it has the gene Bb, the red wouldn't be expressed.



If two horses with the genes Bb and Bb mated, the foal would get one of the two letters from each parent.



......B......b



B.. BB Bb



b.. Bb bb



By this, you can see that the chance of getting a BB (black) foal is 1/4, a Bb (also black) foal is 2/4, and a bb (red) foal is 1/4.



Your foal probably got the bb gene from each of her black parents. I hope this makes sense!!
Reply:the horse could have a differnt coloured grand parent but horses normally grow up to be darker unless they are born white.
Reply:It is possible to get a sorrel from 2 blacks. All horses carry the sorrel gene. Sometimes a black horse isn't born black and can even look chestnut. Just like this filly that turned black:

http://spotted.horsecity.com/pages/big_p...



The Chocolate stallion could have the silver gene if it's mane and tail are lighter or flaxen. Then it would be a diluted black.

A buckskin is a diluted bay. If she has a black mane and tail she will be a bay.
Reply:well the only reason i can think of, and its not exactly that scientific, is that both parents were carriers of the recessive chestnut gene. lets say the genotype of the dam is Bb (B=buckskin, b=chestnut), and the sire's is Cc (C=chocolate, c=chestnut). so the possible combos of the genes in the offspring are BC Bc bC and bc. so the filly got the double recessive of chestnut, and thats where she got her color. and you never know, she might turn dark as she gets older! =)
Reply:its all about hidden genes ill show you b is black and r is red



grand parents B r B r

parent Br Br

youth Rb



you see the cap is domanant uncap resesive
Reply:Chocolate-colour is linked to the red gene pool, and older horses that where born red can develop into a chesnut or chocolate colour ;-)

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