If DNA replication were conservative (although we know it is not), what would Meselson and Stahl have seen following the first round of replication in E.coli that had been switched from a heavy (15N-containing) nutrient medium to a light (14N-containing) nutrient medium? Half the DNA would be heavy, and the other half would be light Half the DNA would be intermediate in density, and one-quarter would be heavy while one-quarter would be light All the DNA would be heavy. All the DNA would be light. Half the DNA would be heavy, and the other half would be intermediate in density