Separation and isolation of DNA fragments can be done by a technique called gel electrophoresis. This technique was developed by

The technique of gel electrophoresis was developed by Arne Tiselius.  The development of gel electrophoresis began with the pioneering work of Arne Tiselius, a Swedish biochemist who had published his first paper on electrophoresis in the paper "A New Apparatus for Electrophoretic Analysis of Colloidal Mixtures" in 1937 and awarded the Noble prize on his work in 1948.