What technique did James Watson and Francis Crick use to find DNA's?

Answer 1

They figured out it was a double helix in a formation consisting of molecules made up of Nitrogen Bases, Adenine(A) Thymine(T) Guanine(G), and Cytosine(C).

They got information from Rosalind Franklin's research on DNA. The data gave Watson and Francis clues they needed for the double helix thing.

Answer 2

The discovery of deoxyribonucleic acid, more commonly known as DNA, has been credited to James Watson and Francis Crick, although many people believe that Rosalind Franklin played a large role in the research. After building the foundation, as it were, Franklin shared certain important parts of her research which enabled Watson and Crick to come to the final conclusion which Franklin would certainly have reached in time.

Franklin had previously worked on this project with a scientist called Wilkins but such was the personality clash between them, that it seriously inhibited her work.

However, she and Crick became good friends professionally and personally and she was offered the chance to be a senior member of the Cambridge unit's scientific staff where Crick worked. Franklin had recently learned that she had cancer and unfortunately became too ill to accept.

She spent her last months with Crick and his family and died in April of 1958 at the age of thirty-seven.

Four years after her death, in 1962, the Nobel Prize in Physiology and Medicine was given to Watson, Crick, and Wilkins. Sadly, because Nobel Prizes are not awarded posthumously, she could not be included in the accreditation.

Another answer:Watson & Crick did not "discover" DNA. (The compound was very well known, as was its function in containing the genetic information within each chromosome.) What they did discover was its structure: its stereo-chemical arrangement of the compound, i.e. the bond-lengths and angles between atoms making up the compound, and the fact that the"backbone" of DNA forms a "double-helix".