How many rounds of replication would result in a 1:1 distribution of hybrid to new DNA helices in the Meselson and Stahl experiment?

Question

Quizplus · Accepted Answer

Two rounds of replication would result in a 1:1 distribution of hybrid to new DNA helices, as demonstrated in the Meselson and Stahl experiment. In this experiment, the bacteria were grown in a medium containing heavy nitrogen (15N) and then switched to a medium containing light nitrogen (14N). After one round of replication, the DNA helices were hybrid, with one strand containing the heavy nitrogen and one strand containing the light nitrogen. After a second round of replication, the DNA helices were distributed equally between two daughter cells, with each cell containing one hybrid DNA helix and one newly synthesized DNA helix with only light nitrogen. This resulted in a 1:1 distribution of hybrid to new DNA helices.

How Many Rounds of Replication Would Result in a 1:1