typing compares isolated DNA from biological evidence found at a crime scene
with DNA isolated from a known sample of a suspect or victim. The amount of DNA
isolated can range from 1 ng/ml to 300,000ng/ml. With recent technology, DNA can
be obtained from as little as 1ml
of blood which represents 60ng of human genomic DNA.
sequence variations can be detected by using several DNA typing techniques.
The two most common of these are restriction fragment length polymorphism (RFLP) analysis and PCR.