Changes

: Scientists did not know what [[gene]]s were made of until [[Rosalind Franklin]] and Maurice Wilkins investigated the structure of [[DNA]] using 'X-ray Diffraction' and then Francis Crick and James Watson built 3d models which showed the [[Double Helix|double helix]] shape of [[DNA]].

: This gave rise to the development of 'Gene Theory' which suggested [[gene]]s were made of [[DNA]] and that they [[Coding DNA|coded]] for the [[Protein Synthesis|synthesis]] of specific [[protein]]s.

===References===

:[https://www.amazon.co.uk/gp/product/1782946748/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782946748&linkCode=as2&tag=nrjc-21&linkId=a4f0348fc37d0ba1bb52d27f8679581f ''Genetic; variation, page 42, GCSE Biology; The Revision Guide, CGP, Edexcel '']

:[https://www.amazon.co.uk/gp/product/1292120193/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120193&linkCode=as2&tag=nrjc-21&linkId=572df39392fb4200db8391d98ae6314e ''Genetics, pages 64-65, GCSE Combined Science, Pearson Edexcel '']