Biology / Unit 6 Bio 1213 short lesson, about 20 seconds
"DNA Replication Keeps One Whole Original Helix Intact"
Captions available
The idea
The conservative-replication model, ruled out by Meselson and Stahl, wrongly predicted one original helix stays intact while an entirely new copy forms.
In practice
Conservative replication would have produced two separate density bands after one replication round; Meselson and Stahl found one intermediate band instead.
Where people slip
An intermediate-density band is direct evidence against this model — it is exactly what semiconservative replication predicts.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Unlocks
- Nothing yet depends on this.
Something wrong in this lesson? Flag it · Sources for Biology