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This project is a meeting place for users who share the A-M202 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.
Haplogroup A1b-M202, more recently named A1b-M13, is derived from the A1b-L427 haplogroup in the ISOGG v12.1 (1-Jan-2017) Y-DNA phylogenetic tree. As of that tree version, its full name including the complete hierarchical ("longhand") name is A1b1b2b-M13.
In breadcrumb notion with full ISOGG v12.1 hierarchical names, this haplogroup's phylogenetic descent from Y-chromosomal Adam is: A0-T-L10854 > A1-P305 > A1b-P108 > A1b1-L419/PF712 > A1b1b-M32 > A1b1b2-L427 > A1b1b2b-M13.
- Y-Haplogroup A @ Wikipedia
- Y-Haplogroup A @ ISOGG
- A (Y-DNA) @ Geni
- Y-DNA haplogroups @ Geni
Naming Changes
On the ISOGG Y-DNA tree, version 12.1 (1-Jan-2017), the SNP "M202" is considered diagnostic for haplogroup A1b-M13 [A1b1b2b], but is no longer the primary SNP choice for identifying this haplogroup. SNP M13/PF1374 is now preferred, but the haplogroup names "A-M202" and "A-M13" refer to the exact same haplogroup since the two SNPs are understood at this time to be phylogenetically equivalent. As of 1-Jan-2017, the set of phylogenetically equivalent SNPs for this haplogroup are considered to be: M13/PF1374, M63/PF1079, M127, M202, and M219.