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Period: to
DNA Research
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Erwin Chargraff
He got the DNA from different organisms and measured the level of the four nitrogenous bases. -
Rosalind Franklin
Was hired to improve the X-Ray crystallography unit in London, England. -
Martha Chase and Alfred Hershey
Compared radiolabeled phage in two test beakers and then waited for the two phages to combine and then stopped the process. They then put it into a warning blender and spun them. The phage stayed in suspension and the bacteria stayed at the bottom because it weighs more. -
Oswald Avery
Used mice as test subjects to see what strains of DNA killed the mice. Then he heated one of the strains of DNA and put it by itself. It worked. The he combined the heated one with the non-heated one and the strain that he heated came out as no being heated at all. -
Francis Crick
Found that the nucleotides work as a code and have a sequence that usually occurs. -
Frederick Sanger
Developed a method to determine the exact sequence of nucleotides in a gene. His “Chain Termination” is used in most labs today. -
Alec Jefferyes
He started to do DNA fingerprinting which uses the variations in genetic codes to identify individuals. It now helps police in investigations to bring down criminals faster. -
Steve Fodor
Developed a chip that lets him see the DNA of people on a chip. Can also see the DNA of animals when he transfers the strains of DNA to the chip.
