DNA's History By tylerb013 Oct 26, 1863 Gregor Mendel Discovered inheritance by using 29,000 pea plants to prove relation between parent plants and daughter plants. Jan 1, 1869 Friedrich Miescher He discovered nucleic acid (DNA) Jan 1, 1928 Fredrick Griffith DNA is a molecule of inheritance Jan 1, 1933 Thomas Hunt Morgan Discovered the chromosomes role in heredity. Oct 27, 1940 Erwin Chargaff Discovered 4 bases of DNA Jan 1, 1944 Oswald Avery He discovered that DNA is the material of which genes and chromosomes are made. Jan 1, 1951 Maurice Wilkins Discovered structure of DNA, made first accurate model. Oct 26, 1952 Hershey And Chase Used radioactive phage virus* to prove that DNA was genetic material. Jan 1, 1953 Watson and Crick Discovered the double helix Oct 27, 1953 Rosalind Franklin Her work on the X-ray diffraction images of DNA Jan 1, 1958 Fredrick Sanger He sequenced RNA and DNA Jan 1, 2000 John Sulton The Human Genome Project, was an attempt to sequence all human DNA-is essentially complete.