What was the contribution of archibald garrod

Question

Problem:

Question 1: What was the contribution of Archibald Garrod to the discovery of gene function?

Question 2: Outline the experiments of George Beadle and Edward Tatum (actually Adrien Srb and Norman Horowitz) that led to the discovery of the one gene-one polypeptide hypothesis.

Question 3: What role did Linus Pauling and Harvey Itano play in the development of the one gene-one polypeptide hypothesis?

Please read all the questions carefully and answer them.