Age: 12,134.9 ± 3,162.9; CI=95% (Behar et al., 2012b)
Origin: The Americas
Mutations: C16111T G16483A
FTDNA Tree: Link
Parent Branch: B2
Descendant branch(s): B2a1 B2a2 B2a3 B2a4 B2a5


Haplogroup B2a is a branch on the maternal tree of human kind. The woman who founded this line lived between 9,000 and 15,300 years ago (Behar et al 2012b).

National Geographic 2.0 Information

This information comes from the 2012 update of the National Geographic Genographic Project website.


mtDNA Haplogroup B2a – Geno 2.0 Author: Balanovsky, O. et al., 2011 Copyright: National Geographic
mtDNA Haplogroup B2a – Geno 2.0 Author: Balanovsky, O. et al., 2011 Copyright: National Geographic

mtDNA Haplogroup B2a Phylotree History

Phylotree.org is the maternal (mtDNA) tree of humanity. It is maintained by Dr. Mannis Van Oven. Each build is a major update to the tree. The current build is #17.

01B2a16111 16483Released 27 Aug 2008
02B2a16111 16483Released 14 Oct 2008
05B2a16111 16483Released 8 Jul 2009
06B2a16111 16483Released 28 Sep 2009
07B2a16111 16483Released 10 Nov 2009
08B2a16111 16483Released 21 Mar 2010
09B2a16111 16483Released 20 Jun 2010
10B2a16111 16483Released 10 Aug 2010
11B2a16111 16483Released 7 Feb 2011
12B2a16111 16483Released 20 Jul 2011
13B2a16111 16483Released 28 Dec 2011; Last Build to use the rCRS
14B2aC16111T G16483AReleased 5 Apr 2012; First version to use the RSRS
15B2aC16111T G16483AReleased 30 Sep 2012
16B2aC16111T G16483AReleased 19 Feb 2014
17B2aC16111T G16483AReleased 18 Feb 2016

mtDNA Haplogroup B2a Data Sources

GenBank Samples

GenBank is a database of genetic sequence data. It is run by the United States National Institute of Health. It serves as the main repository for mtDNA full sequence profiles. Samples come both from published academic literature and donations from genetic genealogy community members. In addition to GenBank samples, listings below may include other samples published but not submitted to GenBank such as those from the HapMap project.

Note: GenBank results currently use Phylotree build 16. I am working on changing resuts over to build 17.

Hg IDPublicationMissing VariantsAdditional Variants
Hap5020766Achilli et al., 2013noneB2a:309.1CC, 315.1C, 8843, 12810, 16182C, 16183C, 16399
Hap5020767Achilli et al., 2013B2a:146B2a:309.1C, 315.1C, 16183C
Hap5022306Zheng et al., 2012noneB2a:315.1C, 9804, 16182C, 16183C, 16224, 16512

Geno 2.0 Data

Data from Geno 2.0 is derived from the The National Geographic Society’s Genographic Project — the DAR. The Hg ID is specific to this site and is used to protect the identities of those who take part in Genographic research. Birth Country, Mother's Birth Country, and Maternal Grandmother's Birth Country have been normalized from DAR database fields. The Maternal Origin is determined based on the three previous fields.

Note: Geno 2.0 results currently use Phylotree build 16. I am working on changing resuts over to build 17.

Hg IDBirth
Birth Country
Maternal Grandmother's
Birth Country
Hap10043322United StatesMexicoMexicoMexico
Hap10043323United StatesUnited StatesMexicoMexico
Hap10043324United StatesUnited StatesUnited StatesUnited States
Hap10043325United StatesUnited StatesUnited StatesUnited States
Hap10043326United StatesUnited StatesUnited StatesUnited States
Hap10043327United StatesUnited StatesUnited StatesUnited States
Hap10043328United StatesUnited StatesUnited StatesUnited States
Hap10043329United StatesUnited StatesUnited StatesUnited States
Hap10043330United StatesUnited StatesUnspecifiedUnited States
Hap10043331United StatesUnspecifiedUnspecifiedUnited States

If you use the information in this table, please credit both this site and The National Geographic Society’s Genographic Project.

Sources & Resources

Related Sources

Additional Resources

mtDNA Consultants

The following members of the community offer paid consulting for those seeking help with mtDNA results. Inclusion on this list is not a recommendation or endorsement of any service.


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Last Updated: Last updated: September 29, 2018 at 11:38 am

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