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This project is a meeting place for users who share the J2 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.
The J2 Y-DNA haplogroup is defined by the presence of a mutation at the M172 SNP marker, and therefore this haplogroup is designated "J-M172" or "J2-M172" in the preferred "shorthand" naming scheme that includes the name of a defining SNP. Rather than using this project page, please go to the J-M172 (Y-DNA) Project for more information and discussion of this haplogroup.