Actually there are different types of Overo, I don't know that it is recessive or dominate, but only one parent has to have it for a foal to get it (in fact if both parents past on the frame overo gene the foal dies). On the other hand two completely solid horses can throw a wild colored pinto foal. I once knew of two purebred registered appaloosas having a very loud flashy splash overo foal!
Now tobiano is dominate, and if a horse carries two genes for it it is homozygous and will only through tobiano foals!
And as for pinto arabians, there certainly are purebreds that are also pintos! Now they can't be tobiano (even though there is currently one in question), but overos definately! Somewhere along the line they started favoring the solid colored horses for show, and bigtime breeders have actually had cosmetic surgery to remove small white body spots! Anything w/ much more white then that was kept well hid! In fact it is rumored that one of the really "big name" stallions originally had a white spot removed from his belly, now that's just a rumor, but he is very prone to throwing lots of white on his foals.
I don't even doubt the guy here is purebred. I just don't really care for them toting him as "rare", I've seen sabino arabians, w/ and w/out blue eyes. If I was a mare owner looking to breed, I'd find that a turn off. I probably wouldn't use that as my final answer, but it'd definately be a mark against them.
Now tobiano is dominate, and if a horse carries two genes for it it is homozygous and will only through tobiano foals!
And as for pinto arabians, there certainly are purebreds that are also pintos! Now they can't be tobiano (even though there is currently one in question), but overos definately! Somewhere along the line they started favoring the solid colored horses for show, and bigtime breeders have actually had cosmetic surgery to remove small white body spots! Anything w/ much more white then that was kept well hid! In fact it is rumored that one of the really "big name" stallions originally had a white spot removed from his belly, now that's just a rumor, but he is very prone to throwing lots of white on his foals.
I don't even doubt the guy here is purebred. I just don't really care for them toting him as "rare", I've seen sabino arabians, w/ and w/out blue eyes. If I was a mare owner looking to breed, I'd find that a turn off. I probably wouldn't use that as my final answer, but it'd definately be a mark against them.