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How DNA was proven to be replicated semi-conservatively The basic idea of semi - conservative replication was that a DNA molecule could split apart and that new nucleotides would line up along each strand opposite their appropriate partners, and join up to form new strands along each half of the original molecule. Each pair of stands could then wind up into a double helix, exactly like the original one. This idea proved to be correct and is called semi-conservative replication because half of the original molecule is conserved in each of the new ones. It was Matthew Meselsohn and Franklin Stahl who proved this in 1958. In the early 1950's nobody knew how DNA was replicated but three possibilities were mentioned: Conservative Replication - One completely new double helix was made from the old one. Semi-Conservative Replication - Each new molecule would contain one new...

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