Watson and Crick discovered the double-helix structure of DNA. Their 1953 model showed that DNA is made of two strands twisted like a spiral staircase, which helped explain how genetic information is stored and copied.

Quick Scoop

  • Their discovery was the structure of DNA , not the discovery of DNA itself.
  • The model also helped explain base pairing : A pairs with T, and C pairs with G.
  • This was a major breakthrough because it showed a mechanism for heredity and replication in living cells.

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