Kinship, Marriage, Household.

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Across
  1. 3. Referring to the immediate family, typically parents and their children.
  2. 7. A marriage system where the couple establishes a new residence after marriage.
  3. 10. A system where descent is traced through only one parent's side of the family (either paternal or maternal).
  4. 13. A marriage system where one man has more than one wife at a time.
  5. 14. A marriage system where the couple lives near or with the wife's brother.
  6. 16. A marriage system where one person has more than one spouse at a time.
  7. 17. A marriage system where the couple goes to live in the wife's community.
  8. 18. A group of people who are related to each other, especially parents and their children.
  9. 19. A marriage system where one person has only one spouse at a time.
Down
  1. 1. A system where descent is traced through both parents' sides of the family.
  2. 2. The study of the relationships between living things and their environment.
  3. 4. The passing of genes or characteristics from parents to their children.
  4. 5. A marriage system where the couple goes to live in the husband's community.
  5. 6. A system where descent is traced through the father's side of the family.
  6. 8. A marriage system where a couple lives in both the husband's and wife's communities.
  7. 9. The relationship between people who are related to each other.
  8. 11. The practice of marrying someone from within a particular group.
  9. 12. A system where descent is traced through the mother's side of the family.
  10. 15. Characterized by equality; in this context, referring to a family structure where spouses have equal roles and responsibilities.