Polled is a dominant trait.
I have a heterozygously polled Nubian buck...it has been nice having kids that don't need to be disbudded. :biggrin
There is a concern with polled to polled breedings. If you end up with a homozygously polled female there is a chance (likelihood?) of her being a hermaphrodite...
I have a heterozygously polled female who is settled to her father (the above buck) :mad
So, when she kids, if any doelings come out polled...well, they aren't leaving the farm until I see whether they will breed or not.
Actually, both the does in my avatar are his daughters. The one in the back is the one he settled.