| A | B |
|---|
| Frederick Griffith | discovered process of transformation (1920s) |
| Oswald Avery | demonstrated that genes are made of DNA (1944) |
| Alfred Hershey & Martha Chase | demonstrated that viruses transmit DNA, not protein (1952) |
| James Watson & Francis Crick | discovered the double helix structure of DNA (1953) |
| Rosalind Franklin | colleague of Watson & Crick, took X-ray photos of DNA (1950s) |
| Erwin Chargraff | DNA base pairing rules (1949) |
| Gregor Mendel | Father of Genetics (1860s) |
| John Langdon Down | gave his name to a chromosomal disorder (1800s) |
| Reginald Punnett | English geneticist famous for his squares (early 1900s) |
| Maurice Wilkins | shared 1962 Nobel Prize with Watson & Crick for work on DNA |
