Gender refers to the social, cultural, and psychological attributes, roles, and behaviors that a society considers appropriate for individuals based on their perceived or assigned sex. It is distinct from biological sex, which is determined by physical characteristics such as chromosomes, hormones, and reproductive organs. Gender is a complex and multifaceted concept that can encompass a wide range of identities and expressions beyond the traditional binary categories of male and female. These include non-binary, genderqueer, genderfluid, and transgender identities, among others. Gender is also influenced by factors such as race, ethnicity, class, sexuality, and disability, and can vary across different cultures and societies.