The double helix

DNA was imagined as two chains of nucleotides forming a double helix. Each adenine bound to a thymine, a guanine bound to a cytosine. The double helix structure allowed replication without structural changes.
 Francis Harry Compton Crick and James Dewey Watson England 1953 The double helix

DNA was imagined as two chains of nucleotides forming a double helix. Each adenine bound to a thymine, a guanine bound to a cytosine. The double helix structure allowed replication without structural changes.