In the early twentieth century, most scientists thought that protein was likely to be the genetic material.
Avery, McLeod and McCarty's experiments supported the hypothesis that DNA was the genetic material.
Avery, McLeod and McCarty's experiments were done to study the genetic material of mice.
Scientists in the early twentieth century were easily convinced that DNA was the genetic material.
Protein is more complex than DNA.
Fred Griffith's experiment supported the hypothesis that protein was the genetic material.