History of Genetic Research Video Lessons

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Problem: The mechanism of replication was determined by Meselson and Stahl. Imagine if their data had turned out differently. Which model would be supported by these hypothetical results?Original : 1 band of N15 only1st generation : 1 band of N15/N142nd generation : 1 band of N15/N14A. ConservativeB. Semi-conservativeC. DispersiveD. Cannot tell from this data alone

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Remember that this experiment involved E.coli that were first cultured in medium containing 15N-labeled nucleotide precursors. They were the transferred to a different medium, now containing 14N-containing nucleotide precursors.

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Problem Details

The mechanism of replication was determined by Meselson and Stahl. Imagine if their data had turned out differently. Which model would be supported by these hypothetical results?

Original : 1 band of N15 only

1st generation : 1 band of N15/N14

2nd generation : 1 band of N15/N14


A. Conservative

B. Semi-conservative

C. Dispersive

D. Cannot tell from this data alone

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