If you have watched the popular television series Crime Scene Investigation
(CSI), you will have learnt that if a person even so much as sneezes, spits,
urinates or puts his sweaty hands against a wall, he will have left enough
evidence for forensic investigators to identify him.
Provided that they can match the left-behind sample with a sample obtained from
that person.
The science that takes these
seemingly inconsequential discards of human activity and scrutinises them in a
forensics laboratory, singling the samples out to one genetic identity is known
as DNA profiling.
