INTERESTING ARTICLE in the Jerusalem Post on "Priestly Paternity Tests," which reviews a book on DNA testing to establish priestly descent and a Jewish DNA profile in general. I don't know anything about the technicalities of DNA testing and I have no idea how well founded the studies are. The claim is:

Dr. Harry Ostrer, chairman of the Human Genetics Program at New York University, sums it up: "Recent work from genetics labs has validated the biblical record of a Semitic people who chose a Jewish way of life several thousand years ago. These observations are the biological equivalent to the discovery of the Dead Sea Scrolls."