Now this is weird...

http://www.andolscreek.com/PintoTan.jpg

Never seen that before! Any ideas what's going on? It's rather cool looking! Seems like the Icelandics have some of the coolest coat colors.

I'm most likely wrong, but I thought I heard that chimerics sometimes present like this and brindle. I think I even saw a pic of a horse that was the same coat pattern as this with brindling.

That's very interesting... I have no explanation for it though, cause I don't know a thing about coats and such, but it's very pretty

That mare is a chimeric, where two twins bond together to form one horse, but the horse (I think) has two seperate DNA strands, so she shows both coat colours from both twins.

I've seen a picture of her before, and there are a couple other horses like her, one of them being AQHA stallion Dunbars Gold.
I have a couple threads on here about chimerism.

Chimera- One in a Million Part 1

And

Chimera- One in a Million Part 2

Pretty sure it has to do with the chimera gene

Heres a pic of Dunbars Gold

Chimera isn't a gene sweetie. It's a term used to describe an animal that is the result of twins that meld together to form one animal in the womb.

Incidently, there has been a case of a human chimera. It was a woman who needed a transplant of some kind, so they tested her three adult sons to see if they were compatable. Not only was the youngest one not compatable, he was also not genetically her son. She had absorbed a twin in her mother's womb, and one of her ovaries belonged to said twin.

It was first discovered in humans actually. I think it happened when a woman got accused of child abduction because a genetic test revealed her kid wasn't related to her.

Ahh, I got it

Wow! He is one handsome fella! Not only because of his color, but because he is exactly what I would want to look for in a quarter horse.

So is brindle ALWAYS caused by chimerism? Does that include brindle colored dogs?

That's interesting about the calico cats as well.