The semi-conservative nature of DNA replication was established by Meselson and Stahl in their classic experiment with bacteria. They grew bacteria in `N^(15)-NH_(4)CI` containing medium with `N_(14)` - containing compounds and allowed to grow for three generation . CsCI density gradient centrifugation of isolated DNA established the nature of semiconservation DNA replication. The pictorial representation below shows the positon of differentially labeled DNA in CsCI density gradient.

Had the DNA replication been conservative, what would have been the pattern ?