Cells with N15 were grown on a medium of 14N for one division then analyzed, which yielded a band of intermediate density between the N15 heavy and N14 standard bands.
The laboratory of one of this' namesakes is concerned with the study of evolution of asexuality among bdelloid rotifers. That namesake also has an eponymous "effect" describing independent divergent evolution of alleles in asexual organisms. This experiment involved the use of E.Coli DNA grown on a medium of  N15for several generations, then extracted and centrifuged. Cells with N15 were grown on a medium of 14N for one division then analyzed, which yielded a band of intermediate density between the N15 heavy and N14 standard bands. For ten points, identify this experiment that verified the semiconservative nature of DNA replication.
The laboratory of one of this' namesakes is concerned with the study of evolution of asexuality among bdelloid rotifers.
{Meselson-Stahl} experiment