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Discussion in 'DNA Questions and Answers' started by peter, Oct 4, 2022.

  1. peter

    peter Administrator Staff Member

    I am, but unfortunately I haven't had a chance to watch the presentation.
     
    • Thanks! Thanks! x 1
  2. Helen7

    Helen7 LostCousins Superstar

    Further to my 'both sides' match reported earlier, this person also matches with me on My Heritage, where they report 4 shared segments and 50 cM (higher than Ancestry's unweighted figure). Maybe Ancestry have used the discarded fourth segment in the assignment? I also have a match with the same person on GEDmatch but there are only 3 matching segments there. I also have a match with this person's niece on all 3 sites, with just one matching segment (16 - 20 cM). Ancestry have assigned the niece as paternal side, but my shared match with the aunt is definitely on my maternal side. The extensive trees of aunt and niece contain no surnames or birthplaces in common with my relatives as far as I can see, so I think I'll have to give up on this one!
     
  3. peter

    peter Administrator Staff Member

    I very much doubt it.
    What you get at GEDmatch will depend on the settings.
    Good idea! As I pointed out in the newsletter not long ago, the reason why most people test is to knock down 'brick walls', and that's where the main focus should be.
     
  4. Helen7

    Helen7 LostCousins Superstar

    Well yes, I normally leave it at the default minimum segment size of 7 cM. But reducing it to 4 cM still gives 3 matching segments.
     
  5. peter

    peter Administrator Staff Member

    Which surely makes you wonder how MyHeritage came up with 4? (There are, of course, other settings you can change at GEDmatch.)
     
  6. Helen7

    Helen7 LostCousins Superstar

    Out of curiosity, I looked at the match via the Chromosome Browser/One-to-One Comparison at MyHeritage/GEDmatch and they both show the longest matching segment on Chr 3 with 2 shorter ones on Chr 13. MyHeritage shows a further matching segment of just 6 cM on Chr 22. This last one does not show at all on GEDmatch (even with minimum segment set to 3). I know you can change different settings at GEDmatch but the one for minimum segment size seemed most appropriate here.
     
  7. peter

    peter Administrator Staff Member

    It's the easiest to understand, certainly - but you have to wonder how MyHeritage found that extra segment.
     
  8. jorghes

    jorghes LostCousins Superstar

    Other than children/grandchildren - I have one other results that turns up a "both sides" - and I'm not sure this will help in anyway, which is my grandmother's grandnephew...
     
  9. Helen7

    Helen7 LostCousins Superstar

    Nieces and nephews - and grandnieces and grandnephews - will correctly show as 'both sides' as they will share the same ancestors as their aunt/great aunt on both maternal and paternal sides.
     

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