Final answer:
Frederick Griffith's transformation experiment showed that DNA is the genetic material of bacteria.
Step-by-step explanation:
Frederick Griffith's transformation experiment showed that DNA is the genetic material of bacteria. In his experiment, he observed that when he injected a mixture of live nonpathogenic bacteria (R strain) and heat-killed pathogenic bacteria (S strain) into mice, the mice died and the isolated bacteria from the dead mice were all of the pathogenic S strain. This led Griffith to conclude that something from the heat-killed S strain had transformed the live R strain into a pathogenic form, suggesting that DNA is responsible for carrying genetic information in bacteria.