This page explains semiconservative DNA replication, where the two strands of DNA separate to serve as templates for new strands. Proposed by Watson and Crick and validated by the Meselson-Stahl exper...This page explains semiconservative DNA replication, where the two strands of DNA separate to serve as templates for new strands. Proposed by Watson and Crick and validated by the Meselson-Stahl experiment, this process ensures each daughter DNA molecule consists of one old and one new strand, resulting in an "immortal strand" passed through generations. This mechanism is observed in both bacteria such as E. coli and eukaryotic organisms during chromosome replication.