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Gregor Mendel
Cultivated some 2,900 pea plants, discovering genes and basic hereditary patterns -
William Bateson and Reginald Punnett
Crossed flowers with certain traits, resulting in numbers different than Mendel's, discovering linked genes. -
Thomas Hunt Morgan
Crossed simple fruit flies, discovering Recombinants among heredity (sex linkage) -
Archibald Garrod
Studied metabolic disorders, publishing the "one gene, one enzyme" Hypothesis -
Frederick Griffith
Combined deadly and harmless pneumonia, discovering DNA's role in the cell -
George Beadle and Edward Tatum
Grew bread molds, determing that one gene does in fact specify the production of one enzyme -
Erwin Chargaff
Tested and pictured DNA, creating Chargaffs rules, including G=C and A=T -
Alfred Hershey and Martha Chase
Experimented with DNA and Protein, determining that the DNA transfered the information from the cells -
Maurice Wilkins and Rosalind Franklin
Took the first picture of DNA -
James Watson and Francis Crick
Studied many of the findings of previous scientists, concluding that DNA formed a double helix -
Marshall Nirenberg
Broke down DNA, discovering the genetic code for RNA
