Meselson-Stahl Experiment

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Paul Andersen explains how the Meselson-Stahl experiment was used to prove that DNA copied itself through a semi-conservative process. They grew E. coli in a medium containing heavy nitrogen (N-15). They then added the E. coli to a medium containing regular nitrogen (N-14) and observed it over several generation.

Reviews

March 2014
Not applicable for middle school. Could be a beneficial video clip for high school biology.
June 2013
Very helpful.