Question

genetic code
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in 1953, who developed the model that is shown below?
james watson and francis crick
marshall nirenberg and heinrich matthaei
rosalind franklin
erwin chargaff
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Explanation:

James Watson and Francis Crick are credited with developing the double - helix model of DNA in 1953. Marshall Nirenberg and Heinrich Matthaei worked on deciphering the genetic code. Rosalind Franklin's X - ray crystallography data was crucial for understanding DNA structure but she did not develop the model. Erwin Chargaff discovered base - pairing rules (Chargaff's rules) but not the overall model.

Answer:

James Watson and Francis Crick