Explain why the replication of DNA is described as semi-conservative

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jessicag15
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hello i really need help on this Alevel Biology unit 2 question:

explain why the replication of DNA is described as semi-conservative??
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jessicag15
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User1014865
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During DNA replication, the DNA helix doesn't reform with its original strand but instead forms a new strand.

The Meselson-Stahl experiment is a good way to visualise and come to grips with what's going on during replication.
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