DNA fingerprinting is a method of identifying an individual based on their unique DNA profile. It is used in a variety of fields, including forensics, paternity testing, and genetic ancestry testing. DNA fingerprinting can be used to identify an individual from a sample of blood, semen, saliva, skin, or other tissue. It can also be used to identify the source of a sample of evidence, such as a weapon or piece of clothing. DNA fingerprinting can be used to determine the parentage of a child, or to identify individuals in the event of a crime.