ABeadle and Tatum
BBateson and Punnet
CSanger and Ingram
DCrick and Franklin
Answer:
A. Beadle and Tatum
Read Explanation:
The one gene-one enzyme hypothesis was proposed by Beadle and Tatum.
It suggests that a single gene produces a single enzyme, which later affects an individual step in a metabolic pathway.
Beadle demonstrated that one gene in a fruit fly produces one enzyme which in turn controls a single chemical reaction.
In this, each gene acts as a chemical molecule and has a particular function.
Beadle and Tatum later confirmed this hypothesis using genetic and biochemical studies of the bread mold Neurospora crassa.
Neurospora crassa to prove that in a multistep biochemical pathway, each step is controlled by different enzymes and each of these enzymes is encoded by a specific gene.
This is called the one gene-one enzyme hypothesis.