YDNA Quick Guide

YDNA Quick Guide


Hundreds of thousands of genealogists have turned to YDNA testing to aid in their genealogical efforts. However, after completing the test, many are faced with more questions than answers. This guide will walk you through each aspect of YDNA testing and help you identify your next steps to finding or extending paternal lines.

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Y Chromosome DNA for the Genealogist

YDNA is the DNA passed down from father to son in a direct paternal line. This guide instructs on the basics of testing YDNA and gives an overview of the features on the YDNA match table you will see after you are tested. Topics include:

  • Is This The Test for Me?

  • Why the Y?

  • Which Testing Company?

  • What Do I Get?

  • Your YDNA Profile

  • How Many Markers? 37, 67 or 111?

  • YDNA Match Table

  • Your Haplogroup

  • Getting SNP Tested