开云体育

Hello!

When blocks on the block tree show zero matches ("DNA Matches 0"), does that mean people in those blocks have more than 30 non-matching SNPs?? Or is there another reason for blocks to show zero matches?

Conversely, what is the reason that Big Y matches don't show up on the Big Y block tree?? Is it because they are matches - having less than 30 non-matching SNPs - but aren't closely enough related on the Y-haplotree to be shown in the block tree?

Thank you!!!

Mary

Hello Mary

We get Big Y matches when there are less than 31 non matching variants. The NM can be public variants on the haplotree, or singleton private variants waiting for matches before being seen on the haplotree. We also see other Y37/67/111 matches on the blocktree, but their NM will be denoted with a single X.

For the last year or so, FTDNA have often drawn new branches on the haplotree (sometimes weeks) before the matching Big Y result is released. Hence we can see terminal branches with single Big Y results. Otherwise only parent branches (with 2 or more descendant branches) can have 0 Big Y (mostly) results.

It is often useful to compare the number of kits on the Discover Haplotree Reports with the blocktree.

Kind regards

John