Quotation

The Gecko-Man (techno genetic in the 90's): Lizard DNA and human DNA in the same sample? But this wasn’t the first time something like this had happened. You couldn’t blame the computer, really. It was an inexact procedure, and only the smallest fractions of the DNA sequences of any given organism were known. He scanned down the printed list. Less than 50 percent of the matches were human—a very low proportion, assuming the subject was human, but not out of the question in a degraded sample. And there was always the   possibility of contamination. A stray cell or two could ruin an entire run. ...