Trace Your Roots with DNA

Genetic typing is the newest tool for amateur genealogists, and it's enthusiastically espoused by the experienced authors of this useful guidebook (Smolenyak is the lead researcher for PBS's Ancestors and the author of In Search of Our Past Ancestors; Turner contributes to the GENEALOGY-DNA mailing list). How does it work? By tracing one's ""DNA heirlooms,"" the two forms of DNA that are passed on in a family from generation to generation. These ""heirlooms"" include genetic markers on the Y chromosome, passed on by fathers, and mitochondrial DNA, passed on by mothers. If it sounds hard to understand and do, the authors reassuringly offer clear explanations of the science and how to use it. DNA typing can tell you if you're related to someone with the same surname, pinpoint a certain ancestor and verify your other research. But, as the authors warn, it could also prove your previous assumptions wrong or uncover unwanted information, such as that a family member was adopted. If you have been researching your family's history and have unanswered questions, this enlightening book may offer some answers; at the very least, it will walk you through the benefits and drawbacks of DNA testing.