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, also termed DNA profile analysis is based on the use of the Southern hybridization technique to analyze polymorphic regions of human DNA. Polymorphisms are explained in more detail in problem 5. The experimental steps used in a forensics laboratory for DNA profile analysis are as follows:NA can be extracted from almost any human tissue. Sources of DNA found at a crime scene might include blood, semen, tissue from a deceased victim, cells in a hair follicle, and even saliva.