The effect of UV radiation on DNA degradation in blood samples

Abstract

Detecting deoxyribonucleic acid (DNA) is an important more of forensic science, it is an crucial to know the extent of the degradation to ensure the DNA can be properly genotyped. Ultraviolet (UV) radiation, a natural component of sunlight, it is a common environmental factor that causes damage to biological molecules like DNA. In forensic science investigations, bloodstains are used to connect suspects and victims in a crime scene. When the stains are exposed to UV radiation the integrity of the evidence can be compromised and no longer be relevant to the investigation. In this research, I have tested the degradation of DNA from aseptic human blood samples due to varying strengths of UV light. Thus far in my research I have placed two samples under UV light one for 22 hours and the other for one week, preliminary results show no difference between the two samples.