Sex Roles
Sex roles refer to behaviors viewed as acceptable for each sex according to societal norms. Sex roles play a large part in determining our development and how we act, and are affected by the environment (unlike Sex Differences).
For example, it used to be that men and women had very specific roles such as, the man went to work to earn money and the woman stayed home to keep the house and raise the children. These were roles that were sex-specific and were determined by the society and the time period.