An ethnic group is a social group or category of the population that is set apart and bound together by common ties of race, language, culture, religion, ancestry, origin myth, history, homeland, dialect, mythology, folklore, ritual, cuisine, dressing style, art, or physical appearance. Ethnicity is based on shared identity based on culture, language, common ancestry, and religion. Ethnic membership tends to be defined by a shared cultural heritage, ancestry, origin myth, history, homeland, language, dialect, religion, mythology, folklore, ritual, cuisine, dressing style, art, or physical appearance. Ethnic groups may share a narrow or broad spectrum of genetic ancestry, depending on group identification, with many groups having mixed genetic ancestry. Ethnicity is not necessarily genetic, and someone might describe themselves by an ethnicity different from their birth identity if they reside for a considerable time in a different area and they decide to adopt the culture, symbols, and relationships of their new community.