00:01
The messleson stahl experiment is a very famous experiment where scientists kind of marked an original dna strand, let mitosis occur for replication, and they checked to see how the parent strands from before were preserved into the daughter strands after replication.
00:23
So there are three kind of models that were possible for this kind of experiment.
00:28
So we started with a heavy nitrogenous set of strands, and there are three possible pathways this could take.
00:40
You had what's called a semi -conservative where the original parent strands, one of them was kept, and a new template strand was based off of it.
00:57
So the light strand here would not contain that heavier nitrogen group that it was marked with originally.
01:03
So this would be a light strand, and you would have the parent heavy strand.
01:13
Another model is called the conservative.
01:18
You're making two sets of strands from the parent dna.
01:22
So in semi -conservative strands, you also have another set of dna where it's kind of just flip -flop.
01:30
In the conservative, you're keeping the original parent strand together, but you've created two copies...