who contributed to the discovery of dna structure
Erwin Chargaff Erwin Chargaff (11 August 1905 â€“ 20 June 2002) was an Austro-Hungarian biochemist that immigrated to the United States during the Nazi era and was a professor of biochemistry at Columbia University medical school.[1] Through careful experimentation, Chargaff discovered two rules that helped lead to the discovery of the double helix structure of DNA.
Forensic science Forensic DNA analysis was first used in 1984. It was developed by Sir Alec Jefferys, who realized that variation in the genetic code could be used to identify individuals and to tell individuals apart from one another. The first application of DNA profiles was used by Jefferys in a double murder mystery in a small England town called Narborough, Leicestershire in 1985. A 15-year-old school girl by the name of Lynda Mann was raped and murdered in Carlton Hayes psychiatric hospital. The police did not find a suspect but were able to obtain a semen sample.