teenagers.]]> interviewed.]]> role to girls, and another to boys.]]> beaten.]]> follow them can be made to feel unhappy with themselves.]]> quietly accept what others tell them to do or do to them.]]> late.]]> fall into using drugs.]]> fights.]]> independent."]]> physical strength can make boys more likely to get into fights.]]> emphasize that females are passive.]]> warns.]]> expected to play with dolls.]]> established in a child's mind by age 10 or 11, study leader Kristin Mmari says.]]>