Scientists are using DNA fingerprinting to help identify the bodies of those killed in the 9/11 tragedy. Most on-site evidence is in the form of bones or teeth. Yet the evidence supplied by the victims' families may include hair or tooth brushes. How are scientists able to compare DNA from bones or teeth to that found in hairs on a hairbrush?
Bones, teeth, and hair are all made of cells and every cell has the same replicated strands of DNA in them so it doesn't matter which part of the body it comes from
