Across
- 2. Original twin
- 4. Identical twins
- 7. Mental disorder
- 9. Authors of study
- 12. Less serious mental health issue
- 13. More serious mental health issue
- 16. More likely in females than males
- 17. Collecting and using data previously used
- 19. Secondary twin
- 20. XY chromosome
Down
- 1. Other things that affect a person apart from biology
- 3. Non-identical twins
- 5. Method of determining zygocity using eyes
- 6. Method of determining zygocity using hands
- 8. Likelihood depending on genetics
- 10. Method of determining zygocity using needles
- 11. XX chromosome
- 14. Method of data collecting done by a health establishment
- 15. Collecting new data
- 18. Methods of getting patients