Biological Theories of Criminality

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Across
  1. 4. Fraternal Twins
  2. 6. Identical Twins
  3. 8. The side of the debate which supports genetic ideas
  4. 9. Conducted a twin study
Down
  1. 1. The psychologist who proposed XYY theory
  2. 2. Type of study to investigate genetics
  3. 3. Theory which involves having an extra chromosome
  4. 5. The rate used to describe the similarity between two twins
  5. 7. Unit of DNA