The Family Tree Guide to DNA Testing and Genetic Genealogy

Second edition - Expanded and Updated!

Discover the answers to your family history mysteries using the most-cutting edge tool available to genealogists. This plain-English guide, revised and expanded, is a one-stop resource on genetic genealogy for family historians. Inside, you'll learn what DNA tests are available, with up-to-date pros and cons of the major testing companies (including AncestryDNA) and advice on choosing the right test to answer your specific questions. For those who've already taken DNA tests, this guide will demystify and explain how to interpret DNA test results, including how to understand ethnicity estimates and haplogroup designations, navigate suggested cousin matches, and use third-party tools like GEDmatch to further analyze data.

Whether you’ve just heard of DNA testing or you've tested with multiple major companies, this guide will give you the tools you need to unpuzzle your DNA and discover what it can tell you about your family tree.

The first edition of this book came out in 2016, and as with most aspects of modern genealogy, the field of genetic genealogy changes quickly. In the few years since the first edition of  'The Family Tree Guide to DNA Testing and Genetic Genealogy' was published, new tests, new testing companies, new methodologies and new third-party tools have all been introduced. This book helps you navigate these latest developments while also covering shared matching, ethical questions about the use of DNA information by the government or other third parties, X-DNA advancements and much more!

What's new in the 2nd edition?
- 32 additional pages
- Fixed typos/errors found in edition #1
- Added information about MyHeritage DNA throughout the book
- Added information about Living DNA throughout the book
- A new section about law enforcement and DNA
- Entirely revised atDNA chapter (including a two-page sidebar about “False Positives and Small Segments, an update on the Shared cM Project, more about shared matching, and more)
- A section in the Y-DNA chapter about the Big Y-700 test
- A new “DNA in Action” section in the X-Chromosome chapter
- A new section about DNA Painter (6 pages)
- Extensive additions to the Ethnicity chapter, including a new section about AncestryDNA’s Genetic Communities
- New sections in the “Analyzing Complex Questions With DNA” chapter and the “Genetic Testing for Adoption and Other Brick Walls” chapter about shared match triangulation
- A fully revamped/revised “Choosing a DNA Test” flowchart
- A fully revamped/revised “Testing Company Comparison” chart
- A relationship chart for determining cousins (what is a 2nd cousin versus a 1st cousin once removed?). Although not new, it is very helpful for DNA analysis
- New genealogy charts found at the end of the book
- A revised “More Resources” section


Softcover, 272 pages, indexed, second edition

Blaine T Bettinger, Family Tree Books 2019


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