Final answer:
The flanking sequences on the 5' side of each C gene (except the delta gene) are highly repetitive sequences that mediate recombination.
Step-by-step explanation:
The flanking sequences on the 5' side of each C gene (except the delta gene) are highly repetitive sequences that facilitate recombination.
Recombination is a process by which genetic material is exchanged between two DNA molecules, resulting in new combinations of genes. In the case of the C genes, these flanking repetitive sequences play a crucial role in mediating the recombination events.
For example, in the context of immunoglobulin antibody molecules, these repetitive sequences allow for the rearrangement of Variable (V), Joining (J), and Constant (C) regions, ultimately generating diverse antibodies that can recognize and eliminate foreign antigens.