YSEQ's $17.50 test for SNP S781 (R1b1a1a2a1a2c1a4a1a) is 100% proof of whether or not a man descends from Sir John Stewart of Bonkyll (died 22 July 1298 at the Battle of Falkirk).
Sir John was the great-great grandson of the first High Steward of Scotland, and the ninth great grandfather of King James I of England.
Web sites for Sir John's patrilineal descendants are at
FTDNA's web site for the patrilineal descendants of the first High Steward of Scotland is at https://www.familytreedna.com/public/Stuart/default.aspx
A man can discover his terminal SNP and to which branch of Sir John's patrilineal descendants he belongs via a Next Generation Sequencing (NGS) test, e.g., Big Y.
A terminal SNP is the defining SNP of the latest subclade known by current research. It should be unique (UEP) and constant in time.
What distinguishes Big Y from Y-DNA SNP tests like Geno 2.0 ?
1) Both Big Y and Geno 2.0 test for thousands of paternal lineage branch markers (SNPs). Unlike Geno 2.0 and related technologies, Big Y is able to detect new branch markers that are unique to your branch of your patrilineal family, or even to you or your agnatic gggg-Grandfather.
2) Geno 2.0 and SNP Packs are microarray chip based and programmed for specific SNPs. Big Y is a next-generation sequence-based test via which NEW SNPs CAN BE DISCOVERED FOR THE FIRST TIME. See https://www.familytreedna.com/learn/y-dna-testing/big-y/
Big Y tests are far more useful than FTDNA's $359 Y-111 tests, which include NO SNPs, and only 111 STR marker values.
Big Y tests include:
1) About 500 STR marker values.
2) One's terminal SNP(s), without which one may not be able to correctly identify one's branch STR marker values.
Anyone who can compare the benefits that he receives with the amount that he pays can easily see that buying any Y-DNA test from FTDNA except its Big Y test is a relative waste of money (FTDNA will not sell a Big Y test to anyone who has not purchased at least a Y-DNA 12 test).
FTDNA has sold its Big Y NGS test for only $425 during its recent December, etc. sales. Don't miss the next opportunity. Prices may increase if demand does.
A comparison of SNP testing companies is at http://isogg.org/wiki/Y-DNA_SNP_testing_chart
Phylogenetic trees that include S781 are at:
http://www.isogg.org/tree/ISOGG_HapgrpR.htmlRating: [5 of 5 Stars!]