Yes, but the question is whether or not a crowless rooster will be horney. When you genetically remove the crow some other things may disappear with it.
That is an interesting question. Maybe someone already knows the answer.
Did you breed from any of those mute serama roosters? Did they have any problems with breeding or fertility?I have had serama roosters that were mute...Yes, a crowless breed could be produced through artificial selection just as long crowers were developed.