Final answer:
The follicular tag is the part of the hair that contains a rich source of DNA which forensic scientists can use for DNA analysis to link individuals to crime scenes. Techniques like PCR and RFLP analysis allow scientists to compare DNA profiles with databases or individuals, making it an invaluable tool in forensic investigations.
Step-by-step explanation:
The follicular tag is a small piece of tissue surrounding the hair's shaft at its root, and it contains the richest source of DNA in a hair sample. When a hair is forcibly removed from the body, it often retains this follicular tag, which forensic scientists can analyze to obtain genetic information.
This genetic information is essential because it allows forensic scientists to perform DNA fingerprinting techniques, such as RFLP analysis and PCR amplification of STR loci. By comparing the DNA from a hair sample to known databases or specific individuals, it provides robust evidence that can link a person to a crime scene or victim. In forensics, it is highly valuable because it can uniquely identify individuals based on their genetic makeup.
People working in the field of forensic science, particularly focusing on biological sample analysis, often hold degrees in sciences such as chemistry, biology, or physics and are skilled in laboratory practices including DNA isolation, sequencing, and sequence analysis. These scientists may present their findings in court as part of the investigation and trial process