I don't know.
In Goat Medicine and a couple other places I have seen, they claim there is no such thing as a homozygous polled true female.
I sure hope there is.
I see more and more breeders breeding polled to polled but I don't know if they are homozygous offspring or not but surely some of them must be. If I ever find a nice polled registered Alpine buck I would buy him in a second as I have a lot of polled does and just increasing the odds of not having to disbudd would be nice.
Oh, I forgot that I read in Goat Medicine that their theory (I think) was that some breeds carry the hermaphrodite gene with the polled gene and others do not. Now I might be remembering totally wrong.