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This project is a meeting place for users who share the J 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.
About Y-Chromosome Haplogroup J-M304
Anthropology. The Y-chromosome J-M304 haplogroup was founded approximately 42,900 years ago, most likely in Western Asia (ref), and the most recent ancestor of all living J-M304 haplogroup men lived around 31,600 years ago (ref). Most living men in this haplogroup trace their ancestry to the Causacus, Middle East, Europe, or Northern Africa, the primary migration destinations of ancient J-M304 haplogroup men (see map inset). The writings on J-M304, J1-M267, and J2-M172 at Wikipedia and Eupedia, and the related discussion forums, are good places to learn more about J-M304 anthropology (see More Information below).
Naming. The defining SNP marker that characterizes or identifies this haplogroup is named M304 (also known as PAGE16, PF4609, or PAGES00016), so in the "shorthand" naming scheme for Y-chromosome phylogenetics, this haplogroup would most properly be named J-M304. Another characteristic SNP for this haplogroup is P209, so the haplogroup has also been named J-P209 or J-M304,P209. The haplogroup is commonly called simply "J" and is a major superclade in the human Y-DNA tree.
Phylogenetics. J-M304 is a subclade (i.e. branch, descendant) of the IJ-M429/P125 haplogroup. The two major branches of the J-M304 haplogroup are J1-M267 and J2-M172. Nearly all living J-M304 men can be assigned to one of these two subclades, although in a few locations the basal J*(xJ1,J2) haplogroup has living representatives.
In breadcrumb notation, the descent of J-M304 from the "Y-chromosomal Adam" ancestral human haplotype is characterized by these haplogroups, established by cumulative mutations: Y-chromosomal Adam > A1-V168 > A1b-P108 > BT-M91 > CT-M168/M294/P9.1 > CF-P143 > F-M89 > GHIJK-F1329/M3658/PF2622/YSC0001299 > HIJK-F929/M578/PF3494/S6397 > IJK-L15/M523/PF3492/S137 > IJ-M429/P125 > J-M304
Defining SNP. This haplogroup's defining SNP, M304, has the synonyms Page16 and PF4609, the accession number rs13447352 (SNPedia | dbSNP | yBrowse), and is located at Y-chromosome position 22749853 (GRCh37) with the mutation A->C. (source: ISOGG Y-DNA SNP Index)
Subclade projects
More Information
- Haplogroup J (Y-DNA) @ Wikipedia
- Haplogroup J and its subclades @ ISOGG
- Haplogroups J1-M267 and J2-M172 @ Eupedia
- Haplogroup J tree @ YFull
- Minimal reference phylogeny for the human Y chromosome: subtree J-M304 (2014) @ PhyloTree
- J-M304 @ YHRD
- Haplogroup J1 and haplogroup J2 discussion forums @ Eupedia
- Haplogroup J forums @ Anthrogenica