What is a gene?

he One-Gene/One-Polypeptide Hypothesis
• Beadle and Tatum concluded that genes produce their effects by specifying the structure of enzymes, and that each gene encodes the structure of one enzyme. Today, this is commonly referred to as the one-gene/one-polypeptide relationship.

How DNA Encodes Protein Structure
• Over 50 years of research has yielded clear evidence that DNA is the molecule responsible for the inheritance of traits from one generation to the next, and that DNA is divided into functional subunits, or genes, located on chromosomes.