Follow
This project is a meeting place for users who share the A-M31 Y-DNA haplogroup, which means they are related along their paternal lines. Users in this group may want to share their family trees with each other to find overlaps and merge duplicate profiles in order to join or expand the World Family Tree and discover new relatives.
This project is about a Y-haplogroup, which defines a group of men by a shared set of inherited features in the DNA of their Y-chromosome. This implies they have a patrilineal ancestor in common, because only males carry a Y-chromosome, which they inherit from their father. The major Y-haplogroups were formed thousands of years ago, and therefore each group can today include thousands to millions of men. For an introduction, you can visit the Y-DNA Haplogroups project, the DNA Testing project, or start at the beginning with the DNA Primer project.
Naming
From 2008 to the present (ISOGG 12.4, 4-Jan-2017), the official ISOGG hierarchical name for A-M31 has been "A1a" and therefore "A1a-M31" is also a valid name for this haplogroup. Any profiles that have been assigned to "A1a" but without a SNP specified should be reevaluated and updated to include the appropriate SNP name (usually M31).
- Y-Haplogroup A @ Wikipedia
- Y-Haplogroup A @ ISOGG
- A (Y-DNA) @ Geni
- Y-DNA haplogroups @ Geni