Mendel first to suggest genetic traits

Identified “Nuclein”, identified DNA as a distinct molecule

First to identify the components of DNA

Discovered that DNA is responsible for heredity and that it varies between species

Proved that phage DNA was the genetic material

Determined the double helix structure of DNA

Researched X-ray diffraction imaging techniques and led to the discovery of the DNA shape, the double helix. She was aided by Willis in her research

Discovered the first "triplet", a sequence of three bases of DNA that codes for one of the twenty amino acids that serve as the building blocks of proteins.

Lead the research team that successfully cloned a lamb

Invented the polymerase chain reaction (PCR)