I think your questions assume a lot of things: - Women do most of the shuttling of kids? I've yet to see any evidence of this. - There are differences between

I think your questions assume a lot of things: - Women do most of the shuttling of kids? I've yet to see any evidence of this. - There are differences between the genders, but 'genetic behavioral differences' is a very broad and deep assumption regarding nature vs nurture and opens a whole other spectrum of basic questions. - Over representation of a gender in some particular field. Being equal does not mean we all have the same aptitudes and interests.