Genetics Timeline

Timeline created by 14myersb
  • Gregor Mendel

    Gregor Mendel
    EXPERIMENT
    -He Self pollinated pea plants to gain the (P Phase)
    -Cross polinated to gain the F1 phase
    CONTRIBUTION
    -Credited with the Principle of Segregation, Principle of Independent Assortment
    -Discovered that Sperm and eggs have one allele (Dom,Rec)
  • William Bateson & Reginald Punnet

    William Bateson & Reginald Punnet
    EXPERIMENT
    -They worked with sweet pea characteristics (Color and Pollen Shape) PpLl
    -Crossed these traits and recorded their results
    CONTRIBUTIONS
    -Discovered Linked Genes
    -Genes can be located on the same chromosome
  • Thomas Hunt Morgan

    Thomas Hunt Morgan
    EXPERIMENT
    -He bred fruit flies for wing and body characteristics
    -His findings were unusual
    CONTRIBUTIONS
    -Discovered gene mapping, Sex linked traits, and Recombination Frequency
  • Archibald Garrod

    Archibald Garrod
    EXPERIMENT
    -He observed inherited diseases
    -Hypothesized that inherited diseases were from the inability to make an enzyme
    CONTRIBUTIONS
    -Relationship between genes and proteins
    -Genes dictate the phenotypes through proteins
  • Frederick Griffith

    Frederick Griffith
    EXPERIMENT
    -He tested bacteria on mice to see why a single strand of a disease kills a cell
    CONTRIBUTION
    -Discovered information that lead to the discovery of transformation
  • George Beadle and Edward Tatum

    George Beadle and Edward Tatum
    EXPERIMENT
    -They studied strains of mold
    CONTRIBUTIONS
    -Discovered the relationship between genes and enzymes
    - "Each mutant is defective in a single gene"
  • Erwin Chargaff

    Erwin Chargaff
    EXPERIMENT
    -Split genes to get a more accurate view of DNA
    CONTRIBUTIONS
    -Discovered the base- pairing rules
    -Amounts of Adenine and Thymine are identical
    -Amounts of Cytosine and Guanine are identical
  • Alfred Hershey and Martha Chase

    Alfred Hershey and Martha Chase
    EXPERIMENT
    -Used Bacteriophage with only DNA and proteins
    -They tagged DNA with radioactive phosphorous and protein
    CONTRIBUTION
    -They determined that DNA was the gentic material of life
  • Maurice Wilkins and Rosalind Franklin

    Maurice Wilkins and Rosalind Franklin
    EXPERIMENT
    -Took an x-ray crystallograph picture of DNA
    CONTRIBUTIONS
    -Confirmed that DNA was a helix
    -Big part if the overall discovery of the structure of DNA
  • James Watson and Francis Crick

    James Watson and Francis Crick
    EXPERIMENT
    -Constructed an up-scale model of DNA using Chargaff's rules
    - Used an X-ray crystallograph to discover the double helix
    CONTRIBUTION
    -Discovered the DNA was a double helix
    -Discovered the size of DNA
  • Marshall Nirenberg

    Marshall Nirenberg
    EXPERIMENT
    -He set up a "Cell Free System" using sap and E Coli
    - He also added RNA composed of only Uracil
    CONTRIBUTION
    - Deciphered the gentic code
    -Discovered the "codon"
    -Synthesized phenylalanine using the codon UUU