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Old 12th July 2017, 10:00 PM
tomwdcraftr tomwdcraftr is offline
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Comparing ancestry Y-DNA test to an FTDNA Y-DNA test

I have questions about comparing an ancestry Y-DNA test to an FTDNA Y-DNA test.

I’m working on my Bryant family ancestry with cousin’s who are Bryant’s that have taken the Y-DNA test. The two are common at their 2nd Great Grandfather, and they match each other for Y-DNA. The only other’s they match are four individuals at 67 markers with the Moore surname, so it seems we have an NPE. Some who match my cousin’s at FTDNA for the Y test, also autosomal tested, but we aren’t finding autosomal matches for those to my Bryant’s.

I did find some shared ancestry autosomal matches for a group of Moore’s who all had siblings in their ancestry from the same Moore line. I found one of those person’s had done a Y-DNA test at ancestry and has a record of his markers. So, I compared his Y-DNA results to my Bryant cousin.

My Bryant cousin is from the R-M269 group.

Here’s the comparison:

My Bryant cousin’s FTDNA Y-DNA markers to compare
19a is 14; 385a is 11; 385b is 14; 388 is 12; 389I is 13; 389II is 29; 390 is 24; 391 is 11; 392 is 13; 393 is 13; 426 is 12; 438 is 12; 439 is 12; 441 is 13; 447 is 25; 448 is 18; 449 is 29; 454 is 11; 455 is 11; 458 is 19; 460 is 10; 461 is 12; 463 is 25; 464a is 15; 464b is 15; 464c is 17; 464d is 18; YCAIIA is 19; YCAIIb is 23; Y-GATA-H-4 is 10;

Mr Moore Y-DNA markers from his ancestry test
19a is 14; 385a is 11; 385b is 14; 388 is 12; 389I is 13; 389II is 29; 390 is 24; 391 is 11; 392 is 13; 393 is 13; 426 is 12; 438 is 12; 439 is 12; 441 is 14; 447 is 25; 448 is 18; 449 is 29; 454 is 11; 455 is 11; 458 is 19; 460 is 10; 461 is 12; 463 is 25; 464a is 15; 464b is 15; 464c is 17; 464 d is 18; YCAIIA is 19; YCAIIb is 23; Y-GATA-H4 is 11;

(I left the DYS off.) The differences show at 441 where my Bryant cousin has 13 and the Moore 14. The other difference is Y-GATA-H4 where my Bryant has 10 and the Moore 11.

I saw this from a post at the FTDNA message board: “FTDNA and Ancestry measure Y-GATA-H4 differently, and Ancestry is always higher by 1.”

So, that would change Mr Moore’s value of Y-GATA-H4 to 10, the same as my Bryant cousin if correct.

If that is correct, would there be any other markers that ancestry calculated differently than FTDNA does, that I should consider in comparing the two tests?

Thanks for any help in better understanding this comparison.

Thanks!! Tom McMillan
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Old 13th July 2017, 07:16 AM
Ann Turner Ann Turner is online now
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This links to a table from SMGF, archived in the Wayback Machine:

https://web.archive.org/web/20150503...standards.jspx
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Old 13th July 2017, 10:59 AM
tomwdcraftr tomwdcraftr is offline
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Wow, thanks so much Ann!!

So, I would add 1 to my Bryant cousin's 441 marker which makes his 14 which matches Mr Moore. Then, adding 1 to the GATA-H4 marker would increase my Bryant cousin by 1 which makes his 11 which also matches Mr Moore.

So, it would seem they have no differences for the 30 markers that ancestry tested for Mr Moore.

Thanks!! Tom McMillan
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