Transformation was discovered by
(1) Meselson and Stahl
(2) Hershey and Chase
(4) Watson and Crick
(3) Transformation was discovered by F Griffith (1928). He isolated the DNA as genetic material that inherit the genetic information between two generation by using two strain of Pneumococcus bacteria which infect mice. i.e., a type III S(smooh) and type II R (rough) strain.