Final answer:
Martha Chase and Alfred Hershey conducted experiments in 1952 to provide evidence that DNA, not proteins, is the genetic material in phages.
Step-by-step explanation:
The experiments conducted by Martha Chase and Alfred Hershey in 1952 provided confirmatory evidence that DNA and not proteins is the genetic material. They studied a bacteriophage, which is a virus that infects bacteria. By labeling the phages with radioactive phosphorus, they were able to show that the radioactive DNA, and not the protein coat, was injected into the host cell and carried the genetic information.