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Conclusions about the importance of Conclusions DNA based on Feulgen staining were not looked upon favorably because the staining of various cells in the same organism seemed to vary in an unreasonable manner. Approximately two decades later Approximately Alfred Mirsky and Hans Ris (1948,1949) determined that the DNA content of nuclei from DNA somatic cells of the same organism is constant, and organism variations in the ratio of DNA to protein in the nucleus accounted for the variations in the staining. A Return to Thinking about DNA as an Information-Bearing Molecule InformationThe chemistry of nucleic acids The went through a revolution when Erwin Chargaff (→), “a licensed biochemist” became aware of biochemist” the genetic evidence that DNA was the hereditary material. Chargaff was instantly Chargaff captivated by the experiments performed by Oswald Avery, Colin MacLeod and Maclyn McCarty in 1944, which indicated that DNA was the genetic material. Books by Erwin Chargaff Fred Griffith’s Transformation Fred Griffith’ Experiment
Avery’s experiments were Avery’ based on the observations of Fred Griffith, who died in his Fred laboratory when London was bombed during WWII. Griffith (1928) discovered Griffith th...
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