In this experiment, the F2 generation consisted of two bands: one a mixture of (*) 14 and 15 nitrogen, the other pure 14 nitrogen.
Both John Cairns and Cyrus Levinthal called this experiment "the most beautiful" in their field. This experiment built on possibilities suggested by Gunther Stent and Max Delbruck in a 1956 paper. The last step of this experiment involved placing the samples in solutions of cesium chloride and centrifuging them. In this experiment, the F2 generation consisted of two bands: one a mixture of (*) 14 and 15 nitrogen, the other pure 14 nitrogen. This experiment eliminated the dispersive and conservative hypotheses, instead supporting the semiconservative model. For 10 points, name this experiment which proved that each new DNA molecule in replication consisted of one strand from the original helix and one new strand, named for two Caltech researchers.
Both John Cairns and Cyrus Levinthal called this experiment "the most beautiful" in their field.
Meselson-Stahl experiment [or any answer with those names in any order; prompt on partial answer]