In Myron Blosser's science class at Harrisonburg High School in Virginia, students do more than study cells under a microscope: They learn to fingerprint and multiply their own DNA using some of the latest techniques in biotechnology.


"It's the same principle they use in forensics," said Blosser, who teaches molecular genetics to high school seniors.


From identifying the remains of American soldiers, to deciding paternity cases, to convicting criminals suspects, DNA testing has become a powerful tool. In one application of the technology, small samples of DNA—such as those found in a strand of hair at a crime scene—can produce enough copies

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