Genetics Timeline

Timeline created by 14farinal
  • Gregor Mendel dominant and recessive genes

    Gregor Mendel dominant and recessive genes
    Mendel constructed a pea plant experiment. He breeded pea plants to see how to get one gene or another. In the experiment he discovered dominant and recessive genes and the principle of segregation.
  • William Bateson and Reginald Punnet discover linked genes

    William Bateson and Reginald Punnet discover linked genes
    Bateson and Punnet crossed doubly heterozygous plants to see which color they would turn out to be. They did this experiment using sweet pea plants. They discovered linked genes and first used Punnet Squares,
  • Thomas Hunt Morgan discovers crossing over

    Thomas Hunt Morgan discovers crossing over
    Morgan breeded fruit flies for eye colors. He discovered that that havig white eyes has something to do with being male. In his experiments, he discovered crossing over ad genetic recombination along with gene mapping.
  • Archibald Garrod discovers genes & proteins

    Archibald Garrod discovers genes & proteins
    Garrod observed inheritd diseases. He showed that inherited diseases reflect a person's inability to makeaparticular enzyme. In these experiments he discovered the relationships between genes & proteins.
  • Frederick Griffith discovers transformation

    Frederick Griffith discovers transformation
    Griffith injected with rats with two different types of bacteria. Lethal and non-lethal bacteria. He then heated the mixtures that were lethal and mixed them. The mixtures were then injected. In this expirement he discoered transformation.
  • George Beadle and Edward Tatum discover function of genes

    George Beadle and Edward Tatum discover function of genes
    Beadle and Tatum studied strands of orange mold that couldn't grow on normal growth mediums. They observes the growth, They discovered that the function of individual genes is to dictate the production of specific enzymes.
  • Erwin Chargaff discovers base-paring rules

    Erwin Chargaff discovers base-paring rules
    Chargaff studied Anenine, Thymine, Cytasine, and Guanine using models of DNA. He discovered that the amount of Adenine is equal to the amount of Thymine, and the amount of Cytasine is equal to the amount of Guanine. These are the base-pairing rules of DNA.
  • Alfred Hershey and Martha Chase discovered DNA was genetic material

    Alfred Hershey and Martha Chase discovered DNA was genetic material
    Hershey and Chase used bacteriaphage composed of DNA & Proteins, Dna was tagged by radioactive phosphorus and protein was tagged with radioactive sulfur.
  • Maurice Wilkins and Rosalind Franklin determine DNA was a helix

    Maurice Wilkins and Rosalind Franklin determine DNA was a helix
    Wilkins and Franklin took x-ray crystallopgraphic photgraphs of DNA. In this expiriment they discovered that DNA was a helix.
  • James Watson and Francis Crick discover double helix

    James Watson and Francis Crick discover double helix
    Watson and Crick made up 2 polynucleotide strand which were combined and led to the creation of the double helix.
  • Marshall Nirenberg discovers gentic codes

    Marshall Nirenberg discovers gentic codes
    Marshall constructed synthesis on artifictial RNA molecules by linking together identical RNA nucleotides having uracil as their base. This led to the discovery of genetic codes.