Final answer:
The Holliday model describes the process of homologous recombination, which is a DNA repair mechanism that occurs during meiosis and DNA replication.
Step-by-step explanation:
The Holliday model describes the process of homologous recombination. Homologous recombination is a DNA repair mechanism that occurs during meiosis and DNA replication. It involves the exchange of genetic material between two homologous chromosomes or sister chromatids, resulting in genetic diversity and the repair of DNA damage.