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DNA Timeline
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Charles Darwin
Charles Darwin created the theory of natural selection. It is not a testable hypothesis. -
Gregor Mendel
Mendel came up with the laws of inheritance. Saying traits are dominant to others. -
Francis Galton
Francis Galton undertook studies of how various traits might be transmitted from parent to offspring. His early experiments, in which he injected rabbits with blood drawn from other rabbits of different colored coats -
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Theodor Boveri
Chromposomes remain organized. He was inspired by the description of them. -
Griffith's Experiment
The first expierimnt that concluded that bacteria could transfer genetic information. It is called transformation. -
Beadle and Tatum
George Beadle and Edward Tatum showed that there was a realationship beteween genes and proteins. -
Oswald T. Avery
Avery discovers deoxyribonucleic acid. He injected mice with a leathal and nonleathal virus and saw what happened -
Linus Pauling Alpha Helix
Linus Pauling discovered that many protiens look like aplha helxies. They are not proteins. -
Chargaff's Ratio
Ewrin Chargaff discovers that the ratio of adenine to thymine and cytosine to guanine is one to one. This was an important clue into solving the structure of DNA. -
Hershy and Chase
Confirmed DNA is genetic material. They showed that when bacteriophages enter bacteria their DNA enters but their protiens do not. -
Rosalind Franklin
After 3 years of reseach Franklin concluded that DNA forms had 2 helices. -
Watson and Crick
Watson and Crick discover DNA. -
Gilbert and Sanger
They imaged the order of nucleotides. Deciphered the genetic code and could spell out amino acids in protiens. -
Human Genome
An effort to sequence the human genome was made in to 1980s. The analysis of DNA could power biological investigation. -
Dolly the Sheep
The first mamal to be cloned. A clone is identicaly similar to its parent. -
Mouse Genome
Celera Gentics announced the completion of a draft mouse genome. They found 14 genes on a mouse chromosome.
