 At the time, Weaver was the director of Natural Sciences for the Rockefeller Foundation and believed that biology was about to undergo significant change due to recent advancements in technology such as X-ray crystallography.Molecular biology arose as an attempt to answer the questions regarding the mechanisms of genetic inheritance and the structure of a gene.In 1953, James Watson and Francis Crick published the double helical structure of DNA courtesy of the X-ray crystallography work done by Rosalind Franklin and Maurice Wilkins.