This is true. Women are generally shorter than men and the shorter you are the closer your center of gravity is to the ground, and the lower it is the higher the stability, which means that women are in theory more stable. Men do have more muscle mess, both in the sense that they are larger physically so there's more mass, and also proportionally.
No because it would look like ww to ww. So if you took a w from each parent the offspring would be ww/ have black wool. Say one parent had white wool that the offspring would be Ww so it is more likely to have white wool. Hope this helps