The molecular theory of recombination explains how genetic material is exchanged between DNA molecules during processes such as meiosis, contributing to genetic diversity. According to this theory, recombination occurs at the molecular level through physical interactions between homologous DNA sequences. The process generally begins with the formation of a double-strand break in one of the DNA molecules. This break is recognized and processed by specific enzymes, creating single-stranded DNA overhangs that are capable of invading a homologous DNA duplex. The invading single strand pairs with its complementary sequence on the homologous chromosome, forming a structure known as a displacement