What blood type our children will have if both parents o neg?

Generally speaking, from what I've learned it Biology, is that more than likely, your children will have the same blood type, because O is a dominant trait. Now in order to get a better understanding of what blood type they would have, you need to know the blood types of your parents, and a little chart can be drawn, and it would basically tell you what blood type your children would have. But I'm pretty sure they will be type O.