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Gregor Mendel
Experiment:
He bred garden peas, in which he used to study the inheritance of phenotypes
He also crossed characteristics to create several generations.
Contribution:
His main contributions are the principle of independent assortment and the principle of segregation.
Some of his minor contributions are the F1 and F2 generations, crosses, and self fertilization. -
William Bateson and Reginald Punnett
Experiment:
They used 2 characterists and crossed them to get a an expected outcome
Contribution:
They are responsible for linked genes and discovering the genotypic ratio. -
Thomas Hunt Morgan
Experiment:
He crossed fruit-flys to study genetic recombination
Contributions:
His contributions are the chromosomal theory of inheritance, gene mapping, sex linkage, and recombination frequency. -
Archibald Garrod
Experiment:
He studied inborn errors in the metabolism, like alkaptonurnia.
Contribution:
His contributions are transciption and translation. -
Frederick Griffith
Experiment:
He used a pathogenic bacteria and a non-pathogenic bacteria the pathogenic bateria and injected it into a lab-rat, the lab rat didn't die, but when he added it with the non-pathogenic, it killed the lab rat.
Contribution:
His main contribution was the tranforming factor. -
George Beadle and Edward Tatum
Experiment:
They studied Neurospora crassa
Contribution:
They clarified the relationship between genes and enezymes. -
Erwin Chargaff
Experiment:
He compared the amounts of adenine and thymine.
Contribution:
His main contribution was Chargaff's rule, which basically stats the a pairs with t and g pairs with c. -
Alfred Hershey and Martha Chase
Experiment:
They used a radioactive marker and marked the DNA and also marked the outside of the phage to see if the DNA, was the heroditary material.
Contribution:
Their major contribution was that DNA was infact the heroditary material. -
Maurice Wilkins and Rosalind Franklin
Experiment:
They took x-ray crystallographic photographs of DNA.
Contribution:
helped to find DNA structure. -
James Watson and Francis Crick
Experiment:
They looked at x-ray crystallographic photos of DNA, to help construct a life sized model of the structure of DNA.
Contribution:
Their contribution is that they finally determined that DNA is infact a double helix and they also created a model of DNA -
Marshall Nirenberg
Experiment:
He studied the codons for the genetic code of the protein Phenylalnine.
Contribution:
He's major contribution was discovering genetic code.
