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.
One common technology used in DNA fingerprinting is the RFLP (restriction fragment length polymorphism) analysis. The first step is to extract genomic DNA (entire DNA pool of a person) from a person. This can be done by using one's hairs or blood. The DNA molecules are enclosed in the nucleus of the cells, so the extract of cells needs to be lysed by