How do stereotypes affect behaviors?

What will be an ideal response?

Stereotypes affect the way we interpret others' behaviors. If we have certain expectations about behaviors, we might considered it unusual or abnormal when our expectations are not met. This might reflect our own stereotypes and misinformation, not the behavior of others.
In addition, when people think others have stereotypes about them, those people often conform behaviorally to the stereotypes. This pattern of behavior might lead blacks to perform lower than they could on tests when they think that people around them expect poor performance. Similarly, women have been shown to perform less well on math when in the presence of men, who might expect the women to perform poorly.