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Period: to
Genetic Timeline
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Gregor Mendel
Cross fertilized and self fertilized pea plants and discovered the principles of genetics and how offspring recieve genes from their parents. -
William Bateson and Reginald Punnett
Crossed double heterozygous plants and proved that genes on the same chromosome are inherited together. -
Thomas Hunt Morgan
Mated fruit flies and discovered crossing over and recombinants. -
Archibald Garrod
Hypothesized that disease that is inherited affects enzymes. Proposed that there is a relationship between genes and proteins. -
Frederick Griffith
Performed an experiment on bacterium that causes pneumonia and discovered a "transforming factor" which was DNA. -
Geroge Beadle and Edward Tatum
Experimented with orange bread mold and discovered genes and proteins are related. One gene, one polypeptide. -
Erwin Chargaff
Experimented with pairs of DNA's polynucleotide chains. The amount of adenine in the DNA of any one species was equal to the amount of thymine, and that the amount of guanine was equal to that of cytosine. -
Alfred Hershey and Martha Chase
Experimented with E Colt, radioactive isotopes, blenders, and centrifuge. THey discovered that DNA is the heredity material. -
Maurice WIlkins and Rosalind Franklin
Experimented with the 3-D structures of proteins and discovered structure of SNA was a helix, x-ray photo. -
James Watson and Francis Crick
Saw an X-ray crystallographic photograph of DNA and discovered specifically how DNA was structured. They figured out that it was from Watson's thought of how the bases paired. -
Marshall Nirenberg
Linked RNA with identical RNA nucleotides with uracil as their base. Deciphered first codon.
