Becoming Watson and Crick

Grade 10 students got to play Watson and Crick by making some models of DNA. Our models didn't win a Nobel Prize but they were tasty. James Watson was 25 years old when he published his paper about the structure of DNA. No pressure, kids. 

The correct model for DNA replication semi-conservative. The new DNA is made from one old strand and one new strand. 

Another proposed model was the conservative model where the new DNA is old and the new DNA is all new. Experiments in the 1950's proved this wrong.  Sorry guys.