Genetics

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Across
  1. 1. unit of heredity
  2. 3. the changing or the structure of a gene
  3. 4. observable characteristics or traits
  4. 6. one of two or more versions of DNA sequence
  5. 7. man-made selection
  6. 8. material in humans
Down
  1. 2. the process in which organisms adapt and change
  2. 5. the change of a species over a long period of time