Another colour question and Irco Lhee

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dozzie

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Does anyone know if Irco lhee is homozygous?

If not what is the likelihood of getting a black foal from IL crossed with a coloured mare (out of chestnut mare x coloured)? Is it possible?

Thanks.
 
If both parents are coloured but hetero, you have a 75% chance of a coloured foal.
It is possible you might get a black foal, but 75% chance that it will be black and coloured! Whether the black appears at all, depends a lot on what's in the mare's mix - I wouldn't rule it out!
 
Thats because black can only appear in two capacities black/black or black/chestnut, the only colour more recessive than black is chestnut.

As your mare is out of a chestnut mare, she will carry the chestnut gene, so theorectically yes if Irco Lhee is a true black with tobiano or black carrying chestnut with tobiano gene you can get a black or black tobiano, what colour is the top colour of your mare? Is she black or bay or......??

Irco Lhee is hetrozygous and so is your mare when it comes to the tobiano gene so you will have 25% chance of breeding a homozygous tobiano foal, 50% chance of breeding a hetrozygous tobiano foal and 25% chance of getting a solid.
 
Thanks that is really helpful!
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I was actually asking for someone who has two full brothers by Irco lhee, one is black, the other coloured! Just so different we were wondering if there had been an accident!!
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Clearly it is possible and have passed the info on.

But what is the tobiano gene?????!!!!!
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The tobiano gene is the gene that attaches to the solid colour gene to make the horse coloured.

Its a two stage process working out what you are going to get when working with coloured horses for example.

I used vincent II, he is homozygous black which means his colour is black/black which means he will only put the black gene forward to his offspring and he is Hetrozygous Tobiano which means there is a 50% chance of getting a coloured.

I use him on my mare that is solid bay, but I know she carries the black gene because she has had a homozygous black foal to a homozygous black stallion (I had him DNAed to see if he was black/black or black/chestnut which is how I know)

Anyway,
My possible colour outcomes from this cross was:

50% chance of Black - genes being black (from mum)/black(from dad)
and
50% chance of Bay - genes being bay (from mum)/black (from dad)

then the fact he was hetrozygous tobiano (coloured) meant that I had the following possible outcomes:

25% chance Piebald (Black Tobiano) black (from mum)/black(from dad) and Tobiano gene (from dad)
25% chance Skewbald (Bay Tobiano) bay (from mum)/black (from dad) and Tobiano gene from dad
25% chance Black - black (from mum)/black (from dad) NO tobiano gene
25% chance Bay - bay (from mum)/black (from dad) NO tobiano gene

genetics all sounds very confusing at first but once you have the basics its actually quite simple to work out colouring (except appaloosa that baffles me senseless!)
 
I see your questions have been answered; just wanted to say, I always always loved Irco Lhee.
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All horses are basically either black or red, everything else is something that happens to that colour. For example a bay horse is black but also carries at least 1 copy of a gene called agouti which modifies black to bay.

Agouti is a dominant (meaning it only needs 1 copy to be present to affect black). IL is black so that means he doesn't carry agouti at all.

Dozziesmummy - you dont say what colour your friend's mare is besides tobiano. But if she had a black foal then she can only carry a maximum of 1 agouti gene, which in the case of the black foal - didnt get passed on.

As the others have said, its perfectly possible/normal for 2 tobiano (coloured) parents to produce a solid foal, depending on their genetic makeup.
 
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