A DNA sample is a small amount of biological material that contains the genetic information of an organism. This sample can be collected from various sources, such as blood, saliva, hair, or skin cells. Scientists analyze DNA samples to study genetic traits, identify individuals, or investigate relationships between organisms. In forensic science, DNA samples are crucial for solving crimes. They can link a suspect to a crime scene or exonerate innocent individuals. Additionally, DNA samples are used in medical research to understand genetic disorders and develop targeted treatments, making them essential in both law enforcement and healthcare.