Final answer:
The Holliday model describes homologous recombination, while the Meselson and Stahl experiments proved that DNA replication is semi-conservative.
Step-by-step explanation:
The Holliday model describes the process of homologous recombination. Related to DNA replication, the Meselson and Stahl's experiments demonstrated that DNA replicates in a semi-conservative manner. This means that each of the two daughter DNA molecules contains one strand from the parent DNA molecule and one newly synthesized strand, supporting the semi-conservative model over the conservative and dispersive models.