Answer:
The DNA fingerprinting is a technique that is used by the forensic scientist to find out who has done the crime, they study and analyze nucleotide sequence in order to solve the crime.
DNA is used where a suspect is identified, the sample of suspected is compared to the evidence that is found at the crime scene. If the DNA sequence of the suspect is similar to the DNA, that is found at a crime scene. It means the crime is done by that person.
It is done in order to find out the human age and its lifespan as it is influenced by genetics. It can also be used to find out genetic disease and to find its cure, to identify the dead body, and in a criminal investigation.