Discovery of DNA Timeline by Kavya Sree Sankara https://padlet.com/ksankara1/zb9sihmryzhjh3ez Made by Kavya and Tvisha en-us 2023-02-06 01:20:16 UTC 2023-02-06 12:34:08 UTC hello@padlet.com Frederick Miescher - 1871 : A material was found in the cell nucleus by Swiss physician and scientist Frederick Miescher in 1869. Nuclein was the term given to this material because it was later discovered to contain DNA. The discovery made by Miescher served as the starting point for research into the chemical makeup of genetic material. ksankara1 https://padlet.com/ksankara1/zb9sihmryzhjh3ez/wish/2469349513 http://www.dnaftb.org/15/bio.html]]> 2023-02-06 01:30:57 UTC https://padlet.com/ksankara1/zb9sihmryzhjh3ez/wish/2469349513 Frederick Griffith- 1928 : Frederick Griffith conducted an experiment in 1928 in which he showed that a virulent strain of Streptococcus pneumoniae could transfer its virulence to a non-virulent strain. This experiment demonstrated the existence of a transforming principle, which was later found to be DNA. ksankara1 https://padlet.com/ksankara1/zb9sihmryzhjh3ez/wish/2469350128 https://www.britannica.com/biography/Frederick-Griffith]]> 2023-02-06 01:31:59 UTC https://padlet.com/ksankara1/zb9sihmryzhjh3ez/wish/2469350128 Oswald Avery- 1944: The discovery of DNA as the genetic material was made possible in large part by Oswald Avery's research from 1944. Avery established DNA as the genetic material and demonstrated that it is responsible for the transmission of hereditary information through his work on pneumococcal bacteria. He discovered DNA was the transforming principle. ksankara1 https://padlet.com/ksankara1/zb9sihmryzhjh3ez/wish/2469350628 https://www.britannica.com/biography/Oswald-Avery]]> 2023-02-06 01:32:45 UTC https://padlet.com/ksankara1/zb9sihmryzhjh3ez/wish/2469350628 Maurice Wilkins - 1951: Through his X-ray diffraction research which was discovered in 1951, Maurice Wilkins also contributed to the understanding of the DNA molecule's structure. His study helped to corroborate the double helix structure hypothesized by Watson and Crick and supplied significant information regarding the arrangement of atoms in the DNA molecule ksankara1 https://padlet.com/ksankara1/zb9sihmryzhjh3ez/wish/2469351341 https://www.britannica.com/biography/Maurice-Wilkins]]> 2023-02-06 01:33:48 UTC https://padlet.com/ksankara1/zb9sihmryzhjh3ez/wish/2469351341 Martha Chase and Alfred Hershey- 1952: In their well-known Hershey-Chase experiment, carried out in 1952, Martha Chase and Alfred Hershey used bacteriophages to demonstrate that DNA is the genetic material. They demonstrated that DNA is the component of the phage that conveys genetic information by demonstrating that the radioactive isotopes of phosphorus and sulfur were integrated into the bacteria. ksankara1 https://padlet.com/ksankara1/zb9sihmryzhjh3ez/wish/2469351946 https://embryo.asu.edu/pages/hershey-chase-experiments-1952-alfred-hershey-and-martha-chase]]> 2023-02-06 01:34:43 UTC https://padlet.com/ksankara1/zb9sihmryzhjh3ez/wish/2469351946 Erwin Charagoff - 1950s ksankara1 https://padlet.com/ksankara1/zb9sihmryzhjh3ez/wish/2469353410 Erwin Chargaff discovered the Chargaff's rules in the 1950s, which stated that the proportions of the four bases in DNA (adenine, guanine, cytosine, and thymine) vary between species. This discovery was important in helping to understand the chemical nature of DNA.

https://www.famousscientists.org/erwin-chargaff/

]]> 2023-02-06 01:36:36 UTC https://padlet.com/ksankara1/zb9sihmryzhjh3ez/wish/2469353410 Rosalind Franklin - 1953: Through the use of her X-ray diffraction photographs, in 1953 Rosalind Franklin significantly aided in the identification of the DNA structure. Watson and Crick used the information in her photographs to help them uncover the double helix structure of DNA, which was crucial information on the atom arrangement in the DNA molecule ksankara1 https://padlet.com/ksankara1/zb9sihmryzhjh3ez/wish/2469356000 https://www.britannica.com/biography/Rosalind-Franklin]]> 2023-02-06 01:40:13 UTC https://padlet.com/ksankara1/zb9sihmryzhjh3ez/wish/2469356000 Linus Pauling- 1949: The group discovered the molecular causes of sickle cell anemia. In 1951, Linus Pauling put up an inaccurate hypothesis for the composition of DNA. Despite the fact that his model was flawed, his work had a significant impact on the development of molecular biology. ksankara1 https://padlet.com/ksankara1/zb9sihmryzhjh3ez/wish/2469356509 2023-02-06 01:40:55 UTC https://padlet.com/ksankara1/zb9sihmryzhjh3ez/wish/2469356509 James Watson and Francis Crick - 1953: The discovery in 1953 of the double helix, the twisted-ladder structure of deoxyribonucleic acid (DNA), by James Watson and Francis Crick marked a milestone in the history of science and gave rise to modern molecular biology, which is largely concerned with understanding how genes control the chemical processes ksankara1 https://padlet.com/ksankara1/zb9sihmryzhjh3ez/wish/2469357596 https://www.nature.com/scitable/topicpage/discovery-of-dna-structure-and-function-watson-397/]]> 2023-02-06 01:42:11 UTC https://padlet.com/ksankara1/zb9sihmryzhjh3ez/wish/2469357596