Dna replication is semi-conservative, and the culture was grown in light media for 1 generation. 2. dna replication is conservative, and the culture was grown in light media for 1 generation. 3. dna replication is semi-conservative, and the culture was grown in light media for 2 generations. 4. dna replication is conservative, and the culture was grown in light media for 2 generations. 5. dna replication is dispersive, and the culture was grown in light media for 1 generation. 6. dna replication is semi-conservative, and the culture was grown in light media for 1 generation, then shifted back to heavy media for 1 more generation. 7. which tube represents the position expected if the bacteria were never shifted to light media at all?