Reference sources: 1  Petwave.com â Obesity Problems. 2  Petwave.com â Dogs Health. 3  Petwave.com â Cancer Types.  Dog Time.com â 10 Most Serious Pet Diseases.
Only a small sample of cells is needed for DNA fingerprinting. A drop of blood or the root of a hair contains enough DNA for testing. Semen, hair, or skin scrapings are often used in criminal investigations. A person who has DNA fingerprinting done voluntarily usually provides a sample of blood taken from a vein.
DNA fingerprinting uses the pattern of DNA fragments caused by specific enzymes to identify individual organisms: humans, other animals, plants, or any other organism with DNA. DNA fingerprinting is useful in paternity analysis, criminal cases, and many studies of ecology and evolution.n actual human fingerprint is a series of ridges on the tip of each finger. The pattern of these ridges varies from person to person and is so distinctive that each person can be identified by their fingerprint.