Final answer:
Children are aware of gender roles by age two or three, and by four or five, they are firmly entrenched in culturally appropriate gender roles.
Step-by-step explanation:
Children learn at a young age that there are distinct expectations for boys and girls. Cross-cultural studies reveal that children are aware of gender roles by age two or three. At four or five, most children are firmly entrenched in culturally appropriate gender roles (Kane 1996). Children acquire these roles through socialization, a process in which people learn to behave in a particular way as dictated by societal values, beliefs, and attitudes.