Gender refers to the roles that society defines for women and men, boys and girls.
Sex roles, in contrast, refer to the biological function of being male and female. They become institutionalized in social practices, ideas and relationships and become ingrained in the consciousness of both men and women. For twenty years the mothers and grandmothers of the disappeared have walked around the Plaza de Mayo. They began walking during the days of the dictatorship as a means of searching for their daughters and sons who had disappeared. After all this time they have not lost hope.