Cross Breeding Crossword

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Across
  1. 1. another word for crossbreeding
  2. 4. basic unit of hereditary
  3. 5. range of differences
  4. 8. chemical compound of food
Down
  1. 2. the act of farming
  2. 3. looking all the same
  3. 6. green and alive
  4. 7. not able to reproduce