Re: Z17911 BigY
To add a some additional thoughts on this...toggle quoted messageShow quoted text
- You can see the four SNP test result states in Alex's mutations
matrix at the Big Tree.
- How do we know Thomas and Bennett are BY11573 if their results are
'maybe'? Because it would be incredibly unlikely that it's mere chance
that they both show this particular mutation at this exact location
that also aligns with a proven SNP. FTDNA, however, is super
conservative about making such assumptions.
- While FTDNA does not report 'maybe' results for Big-Y, it does for
SNP Packs. It shows these with an asterisk and describes them as "no
calls". My SNP results show BY4028*, for example. Even though this SNP
was a 'maybe' test result, because my terminal SNP is downstream from
it, I know I have it.
- FTDNA uses some unknown formula or method to sometimes define 'solo'
terminal SNPs - when only one person has tested positive for it. For
example, Pillsbury shows terminal SNP of BY13850 even though he's the
only one to have ever tested positive for it. Hays (N28178) similarly
is alone with BY13845. On the other hand, Joel Hartley shows terminal
SNP of Z17911, even though he alone has the A11130 SNP. I'm not sure
how they determine which solo SNPs are worthy of 'terminal' status. I
generally use FTDNA's determination in marking the haplogroups of my
tree - http://dna.smithplanet.com/media/Z16357-SNP-Tree.pdf - as
verified or theoretical.
- Remember the term "terminal SNP" is a misnomer - it really means
"temporary terminal SNP" - it's the last one we can reasonably
verify... for now.
On Thu, Feb 2, 2017 at 7:25 PM, Jared Smith <jared@...> wrote:
There are really four levels of reporting for each SNP: positive,