Inside the cell

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Across
  1. 2. Thread-like structures made of DNA (11)
  2. 5. The control centre of the cell (7)
  3. 6. The basic unit of life (4)
  4. 7. Contains genetic information (3)
Down
  1. 1. The process of passing traits from parents to offspring (11)
  2. 3. Small sections of DNA that code for characteristics (5)
  3. 4. Instructions carried by DNA (12)