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Thread: How do MyHeritage's and 23andme's criteria for the Ashkenazi category differ?

  1. #11
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    Quote Originally Posted by Claudio View Post
    Do you match any segments with these kits at default 7cm Setting?
    Closest one was 6.8cm.
    הִנְנִי֩ מֵבִ֨יא אוֹתָ֜ם מֵאֶ֣רֶץ צָפ֗וֹן

    Jeremiah 31

  2. #12
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    Quote Originally Posted by StillWater View Post
    Closest one was 6.8cm.
    Ok so No matching segments at 7cm setting? Correct?

  3. #13
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    Quote Originally Posted by Claudio View Post
    Ok so No matching segments at 7cm setting? Correct?
    Correct.
    הִנְנִי֩ מֵבִ֨יא אוֹתָ֜ם מֵאֶ֣רֶץ צָפ֗וֹן

    Jeremiah 31

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     Claudio (08-03-2019)

  5. #14
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    Quote Originally Posted by Claudio View Post
    Do you get these Aegean matches at the default 7cm threshold setting?
    No, but I got some matches at 6.6, 6.7, 6.8, and 6.9.

    These are my results if I restrict the range to 5 cM and up:

    A097858 Grevena 5.9 cM
    CL6099358 Kefalonia, Ionian Islands 5.8 cM
    A843707 Peolopnnese 5.3 cM
    A684751 Icaria, Aegean 5.3 cM
    A570896 Andros, Aegean 6.3 cM
    A947163 Chios, Aegean 5.6 cM
    Z825068 GreeceCentr8 6.6, 5.1 cM (MRCA 7.1)
    Z376248 GreeceThessaly3 6.0 cM
    Z418934 GreeceMaced1 5.4 cM
    Z721721 GreeceMaced3 6.9 cM (MRCA 7.5)
    Z659969 GreecePelop10 6.7, 5.0 cM (MRCA 7.1)
    Z482928 GreecePelop6 6.8 cM
    Z686475 GreecePelop8 5.1 cM (MRCA 7.7)

    Is the MRCA predictor accurate at all? Seven generations seems quite recent...

  6. #15
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    Quote Originally Posted by jetshop View Post
    No, but I got some matches at 6.6, 6.7, 6.8, and 6.9.

    These are my results if I restrict the range to 5 cM and up:

    A097858 Grevena 5.9 cM
    CL6099358 Kefalonia, Ionian Islands 5.8 cM
    A843707 Peolopnnese 5.3 cM
    A684751 Icaria, Aegean 5.3 cM
    A570896 Andros, Aegean 6.3 cM
    A947163 Chios, Aegean 5.6 cM
    Z825068 GreeceCentr8 6.6, 5.1 cM (MRCA 7.1)
    Z376248 GreeceThessaly3 6.0 cM
    Z418934 GreeceMaced1 5.4 cM
    Z721721 GreeceMaced3 6.9 cM (MRCA 7.5)
    Z659969 GreecePelop10 6.7, 5.0 cM (MRCA 7.1)
    Z482928 GreecePelop6 6.8 cM
    Z686475 GreecePelop8 5.1 cM (MRCA 7.7)

    Is the MRCA predictor accurate at all? Seven generations seems quite recent...
    It can be.
    But I would not take a match as legitimately real unless you share segments at the 7cm default setting.

  7. #16
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    Quote Originally Posted by Claudio View Post
    It can be.
    But I would not take a match as legitimately real unless you share segments at the 7cm default setting.
    So what does it mean that I have these matches but they may not be "legitimately real?" Is the match just purely a coincidence or is it something ancient that a huge amount of people share so it's not very significant? (I'm new to learning about how this all works, in case you couldn't tell. )

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     Claudio (08-04-2019)

  9. #17
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    Quote Originally Posted by jetshop View Post
    So what does it mean that I have these matches but they may not be "legitimately real?" Is the match just purely a coincidence or is it something ancient that a huge amount of people share so it's not very significant? (I'm new to learning about how this all works, in case you couldn't tell. )
    The lower the segment length, the higher chance that it's a coincidence. It just happens that Gedmatch draws the line at 7cm.
    הִנְנִי֩ מֵבִ֨יא אוֹתָ֜ם מֵאֶ֣רֶץ צָפ֗וֹן

    Jeremiah 31

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     Claudio (08-04-2019)

  11. #18
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    Quote Originally Posted by jetshop View Post
    So what does it mean that I have these matches but they may not be "legitimately real?" Is the match just purely a coincidence or is it something ancient that a huge amount of people share so it's not very significant? (I'm new to learning about how this all works, in case you couldn't tell. )
    Probably the second as in ancient DNA Similarity.

  12. #19
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    Quote Originally Posted by StillWater View Post
    The lower the segment length, the higher chance that it's a coincidence. It just happens that Gedmatch draws the line at 7cm.

    This is true.
    But Setting it lower than 7cm can result in fake segment matches.
    The default settings of Gedmatch are set at 7cm for a reason.

  13. #20
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    If anything the fact that both of you are sharing segments at this low threshold probably is an indication of having shared ancient Aegean Admixture.

  14. The Following User Says Thank You to Claudio For This Useful Post:

     jetshop (08-05-2019)

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