Biological explanations of anxiety and fear related disorders

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Across
  1. 2. Gene linked to anxiety and fear-related disorders
  2. 3. Type of twins sharing 100% of their DNA (abbrev.)
  3. 6. Neurotransmitter associated with stress and anxiety
  4. 9. Idea that behaviour is determined by biological factors
  5. 12. Rate at which both twins share a disorder
  6. 13. Side of the debate stating behaviour is due to genes
Down
  1. 1. Brain structure linked to _________ and attention
  2. 3. Animal that is genetically modified to test gene effects
  3. 4. Genetic _______: Biological predisposition passed from parents
  4. 5. External influences such as upbringing and experience
  5. 7. ________ MUTATIONS: Newly occurring genetic changes not inherited from parents
  6. 8. Opposing concept suggesting choice influences behaviour
  7. 9. Type of twins sharing about 50% of their DNA (abbrev.)
  8. 10. STUDY Study type comparing identical and non-identical twins to test genetics
  9. 11. Stretch of DNA on chromosome 15 linked to anxiety