I saw this bumper sticker on someone's website and its not far off the mark! The value of Y-chromosome testing in genealogy can be summed up in one statement: "Surnames are really just a method of keeping track of Y-chromosome patterns". With at least 830 surname DNA studies and over 40,000 people tested it is clear that this tool works! If you are interested in this new tool in genealogy go to www.penningtonresearch.org and click on DNA Study.