1. DNA damage can occur spontaneously or be induced by external factors. Describe the types of DNA damage caused by external factors and how they are repaired in prokaryotes and eukaryotes.
2. Forensic analysis of DNA involves polymorphisms.
a) Define polymorphisms.
b) Describe the nature of the three types of polymorphism that have been routinely used in forensic analysis to date.
c) Explain, using a suitable named example, how a polymorphism may influence disease and health.