What happens if you breed...

You get a coloured foalie if I remember rightly from my genetics modules
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If both horses are homozygous and the same colour, your foalie will be what ever colour they are. The interesting bit is if they are different homozygous colours, then which ever is the dominant will come out.
Grey is all dominant, chestnut is totally recessive.
 
Depends what the individual horses are homozygous for. If one is homozygous for grey for example you'll end up with a grey. Have seen homozygous spot x homozygous tobiano, resulting foal was tobiano with spots!
 
I am totally confused now! Someone help me out- my new pony is Chesnut (r) but his dam was grey(D) his father bay.... so why did he turn out chestnut is his mum was grey and this is dominant and dad bay?
 
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I am totally confused now! Someone help me out- my new pony is Chesnut (r) but his dam was grey(D) his father bay.... so why did he turn out chestnut is his mum was grey and this is dominant and dad bay?

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His mum and dad must have both had a recessive chestnut gene.
 
Genotype is the programming, Phenotype is what you see. A horse can carry a 1 colour gene but look a totally differant colour. Some genes are recessive to others. From the literature I have seen, Black is the basic, chestnut is dominant over black but recessive to bay, grey appears to trump them all. You get mutations occuring Donnerhall being the most famous, a chestnut from black parents, red fresians crop up occationally.

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I am totally confused now! Someone help me out- my new pony is Chesnut (r) but his dam was grey(D) his father bay.... so why did he turn out chestnut is his mum was grey and this is dominant and dad bay?


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Chestnut is recessive and Bay dominant, so the stallion was heterozygous bay (1 bay gene). Grey is also dominant and over the bay gene so the mare was heterzygous grey (1 grey gene). Both must have carried chestnut or black, which is aparent recessive to everything, for your boy to be chestnut. It is a bit like playing trumps cards!! Don't forget each foal or person only gets half its genes from each parent, there is only a 50% chance of a single gene being inherited from a heterozygous parent. SO your boy being chestnut from a simple combination was a 25% chance, 50% grey, 25% bay.
 
there are two base colours-black and red

black is dominant over red

bay restricts black to the points, bay always shows on a black base

bay can be carried by a chestnut base but will not show on a chestnut



the other stuff is beyond me :P
 
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