DNA replication is the process in which DNA serves as the template for its own synthesis.When Watson and Crick proposed the double helical base- paired model for DNA structure in 1953,the idea of a process in which parental DNA directs its own synthesis emerged. "It has not escaped our notice that the specific pairing we have postulated immediately suggests a possible copying mechanism for the genetic material." J.D.Watson F.H.C.Crick, Nature1953,171,737-738DNA replication is the process in which DNA serves as the template for its own synthesis. When Watson and Crick proposed the double helical base￾paired model for DNA structure in 1953, the idea of a process in which parental DNA directs its own synthesis emerged