World Families Forums - Finding Your Terminal SNP (Or Any SNP)

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rms2
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« on: February 16, 2013, 03:16:36 PM »

You've received your brand new FTDNA y-dna test results. On your "Haplotree & SNPs" page, you have a y haplogroup prediction or, if you have been SNP tested, an actual SNP test result and a terminal SNP. FTDNA has supplied you with the shorthand version of your haplogroup placement, which consists of a single-letter prefix (in this case, R), followed by a dash and the name of your terminal SNP. That single-letter prefix is the name of the major branch of the y-dna phylogenetic tree to which you belong (probably R in your case, since you are viewing the R1b subforum).

To find out more about your terminal SNP, use the Y-DNA SNP Index maintained by ISOGG (the International Society of Genetic Genealogy):

http://www.isogg.org/tree/ISOGG_YDNA_SNP_Index.html

The SNP index allows one to easily look up his terminal SNP (or any SNP that has been included in the table) and get useful information about it, including the longhand version of the subclade it characterizes.

Finding an SNP in the index is quick and easy. On a pc, just hold down the Control (Ctrl) key and hit the f key. A small "Find" box should appear in the lower left corner of the screen. Type the name of the SNP in the box and click on "Next". The SNP, if it is in the table, will appear highlighted.

To find your SNP's position on the y-dna phylogenetic tree, just use ISOGG's phylogenetic trees:

http://www.isogg.org/tree/index.html

Click on the letter of the major branch y haplogroup to which you belong (the single-letter prefix in the shorthand haplogroup designator supplied to you by FTDNA on your "Haplotree & SNPs" page). That will take you to the ISOGG tree for that y haplogroup. Then just use the "Find" function I described above to locate your SNP on the tree.

You can also go straight from the Y-DNA SNP Index to the major branch haplogroup tree simply by clicking on the longhand version of your subclade. That link won't take you right to your subclade and SNP, however. You will still have to use the "Find" function described above or the old-fashioned and slower method of scrolling down and hunting for them.

Hopefully, FTDNA will have an updated tree soon, and its nifty animated "Haplotree" feature will make things even easier. In the meantime, ISOGG's Y-DNA SNP Index and phylogenetic trees are simple and easy to use.

Hope this is helpful.
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rms2
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« Reply #1 on: February 16, 2013, 03:26:58 PM »

I should note that one's y-dna haplogroup also now appears in the center right of the home page of one's "myFTDNA" pages. So, it isn't necessary anymore to go the "Haplotree & SNPs" page to find it.
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Terry Barton
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« Reply #2 on: January 03, 2015, 05:42:22 PM »

Two confusions which may cause you to be the one who can't find your Haplogroup:

1. FTDNA just moved to a new version of their tree - currently with disruption to all projects and many users.  Many men with a R1b haplogroup currently have no designation reported - even if they had one the last time they looked.  FTDNA reports that they are working on this - so hopefully, this will be be addressed soon.  (I wish FTDNA could/would debug before launching!)

2. Since FTDNA went to the "Terminal SNP" - now more correctly called "Short Hand" -  instead of listing the "Long Form", there has been a disconnect for some folks.  Sometimes, FTDNA lists a Haplogroup (SNP) that is not on the ISOGG tree.  And, other times, they list a SNP that is found in more than one Haplogroup.  FTDNA also will list a different SNP than ISOGG does to define a branch even when the two trees are aligned, so check the other SNPs in the line.  These issues cause us users problems!  I am hoping that this issue will become less significant over time - as FTDNA and ISOGG make their trees more compatible. 

Comment:  ISOGG volunteers who maintain the ISOGG yTree have been pleased to note the numerous scientific research papers that cite the ISOGG yTree.  Now that FTDNA doesn't publish the long form that underlies their tree - I suppose that ISOGG must be the primary source for everyone.  They certainly are for me.  WorldFamilies supports many Surname projects and provides many of those projects with their Results Table.  Since FTDNA went to their short hand designation, WorldFamilies now displays two columns for Haplogroup - the short hand that FTDNA reports and the corresponding long form from ISOGG.  (Thank You, ISOGG !!! )

Wishing each of you a Happy New Year - and fresh learning on your Deep Clade

Terry
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