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6. how many chromosomes do egg and sperm cells have?

  • 36 chromosomes
  • 23 chromosomes
  • 56 chromosomes
  • 46 chromosomes

7. what year did they make this model?

  • 1953
  • 1853
  • 1943
  • 1893

8. what structure type does DNA have?

  • double helix
  • triple helix
  • single helix