Twins

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Across
  1. 3. — the way a person acts or responds.
  2. 5. — a characteristic of a person such as height or behavior.
  3. 8. — differences between individuals.
  4. 9. — the period during which a fetus develops in the womb.
  5. 12. — the legal process of raising a child born to other parents.
  6. 14. — one of two children born at the same time from the same pregnancy.
  7. 15. — similarity between individuals.
  8. 16. — the study of how environmental factors affect gene activity.
  9. 17. — a proposed explanation that can be tested.
  10. 20. — the intake of food needed for growth and health.
Down
  1. 1. — a unit of heredity that carries biological information.
  2. 2. — a group of individuals in a study.
  3. 4. — the number of births in a population.
  4. 6. — the pattern of thoughts, feelings, and behaviors.
  5. 7. — a change in genetic material.
  6. 10. — systematic investigation to discover facts.
  7. 11. — the study of heredity and genes.
  8. 13. — external conditions influencing development.
  9. 18. — a person’s sense of self.
  10. 19. — a widely held but false belief.