dna testing

     

Genetic fingerprinting (also calle DNA testing, DNA typing, or DNA profiling) is a technique used to distinguish between individuals of the same species using only samples of their DNA. Although two individuals will have the vast majority of their DNA sequence in common, DNA profiling exploits highly variable repeat sequences called VNTRs. These loci are variable enough that two unrelated humans are unlikely to have the same alleles. The technique was first reported in 1984 by Dr. Alec Jeffreys at the University of Leicester, and is now the basis of several national DNA identification databases.