What Is DNA?
NA, or deoxyribonucleic acid, is
the fundamental building block
for an individual's entire genetic
makeupour hereditary blueprint passed
on to us by our parents. It is a component
of virtually every cell in the human body.
A person's DNA is the same in each cell
and it does not change throughout a person's
lifetime. For example, the DNA in
a person's blood is the same as the DNA
found in that person's saliva. DNA also is
found in skin tissue, sweat, bone, the root
and shaft of hair, earwax, mucus, urine,
semen, and vaginal or rectal cells. Parts
of the DNA determine our physical characteristics,
such as eye and hair color,
height, and bone structure, but the DNA
collected from the crime scene is for evidentiary
purposes only and not to determine
an assailant's physical characteristics.
Evidence: A Guide for
Victim Service Providers