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Thread: DNA results with a big surprise

  1. #1
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    DNA results with a big surprise

    Hello, I'm a tad surprised by my 23&me results, and not sure what to think

    I never knew my father, but my mother had always told me and everyone else that my father was of Italian origin, or mainly of Italian origin. Also, my surname is an Italian name. My results came back and show 0% Italian at every confidence level. More generally, southern European comes back with 0% at every level.

    I'm new to this site, so I'll upload the report at a later time, but just curious if the results could be extremely off?

    This is my ancestry composition when I move the slider to the 70% confidence interval

    100% European, which is broken down as follows

    73.5% British/Irish
    26.2% broadly Northwestern European
    0.3 broadly European


    at the default level, it's the following

    88.5% British/Irish
    3.8% French/German
    7.7% broadly Northwestern European

    90% confidence level(conservative)

    36.2% British/Irish
    58.9% broadly Northwestern European
    4.4% broadly European
    .5% unassigned

    Supposedly, my father's paternal line was 100% Italian. I know this isn't an exact science, but it seems odd that 23&me would detect 0% Southern European

    Is it highly likely that my biological father was not actually an Italian American ?
    Last edited by Archimedes; 05-06-2018 at 09:59 AM.

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    Yeah, it seems highly likely that he wasn't, at least not genetically.

    Do you know what your mother's ancestry is? Helpful to be able to know what to attribute to her, although that looks pretty strongly British Isles/NW Europe for both parents.

    Also, depending on what else you know it's possible it doesn't mean that the man you think is your father isn't. Do you know your paternal relatives? He could have been adopted, for example.

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  5. #3
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    Thank you for the reply

    Yes my mother's ancestry was 100% Irish/ British. Her mother was from Ireland, and father was 100% English/Irish. I don't know any of my paternal relatives. I've been thinking about the various scenarios that could explain my results, and my father being adopted was one of them. My mother died young, so it's not possible to ask her.

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    Quote Originally Posted by Archimedes View Post
    Hello, I'm a tad surprised by my 23&me results, and not sure what to think

    I never knew my father, but my mother had always told me and everyone else that my father was of Italian origin, or mainly of Italian origin. Also, my surname is an Italian name. My results came back and show 0% Italian at every confidence level. More generally, southern European comes back with 0% at every level.

    I'm new to this site, so I'll upload the report at a later time, but just curious if the results could be extremely off?

    This is my ancestry composition when I move the slider to the 70% confidence interval

    100% European, which is broken down as follows

    73.5% British/Irish
    26.2% broadly Northwestern European
    0.3 broadly European


    at the default level, it's the following

    88.5% British/Irish
    3.8% French/German
    7.7% broadly Northwestern European

    90% confidence level(conservative)

    36.2% British/Irish
    58.9% broadly Northwestern European
    4.4% broadly European
    .5% unassigned

    Supposedly, my father's paternal line was 100% Italian. I know this isn't an exact science, but it seems odd that 23&me would detect 0% Southern European

    Is it highly likely that my biological father was not actually an Italian American ?
    Italy is a small region, and while they are reasonably genetically-distinct, today's tests are still not so good at isolating and identifying DNA from single countries. 23andme's test is the best on the market though, and Europe South is a broad region that is much more easily identifiable than a single country. The fact that you are getting 0% consistently really does mean that among the ~600,000 SNPs read by the 23 chip, none of them match with native italians.

    Try uploading your raw DNA to GEDMATCH and run it through the K36 Eurogenes test. They have a specific Italian population in there.
    Paper trail ancestry:
    Mum = 50% Irish, 37.5% Ukrainian, 12.5% Romanian
    Dad = 43.75% French-Canadian, 6.25% Irish, 50% English (25% Essex and 25% Northumberland)
    Big Y 500 = R M269 -> DF27 -> Z195 -> FGC34865 (Western France; ~500 ybp)
    mtDNA = J1c2e
    Most Distant Known Ancestor = Jean Moreau b. 1630s Parthenay, Deux-Sèvres, France
    Surnames = Welch, Chibry, Moreau, Todd, Anderson, Bedford, Joncas, Basaraba

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     Archimedes (05-08-2018)

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    What is your Y-DNA haplogroup? Since you inherit that from your main paternal line it could give a hint to his possible origins.

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    Quote Originally Posted by fostert View Post
    Try uploading your raw DNA to GEDMATCH and run it through the K36 Eurogenes test. They have a specific Italian population in there.
    I wouldn't say the K36 calculator is very reliable in terms of finding out traces of recent ancestry, because each ethnicity is more of a component rather than actual ancestry. I can't post links yet but the distribution map of the Italian component says it can be up to 11% for native Brits. (And at its peak in Italy goes only as high as 27% so again it comes to show it's a component rather than actual Italian ancestry)

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    Now that I can post links and photos:

    From thread https://anthrogenica.com/showthread....ancestry-tools

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    I’m going to upload my raw dna later today . Can you help me analyze the results ?

    Quote Originally Posted by fostert View Post
    Italy is a small region, and while they are reasonably genetically-distinct, today's tests are still not so good at isolating and identifying DNA from single countries. 23andme's test is the best on the market though, and Europe South is a broad region that is much more easily identifiable than a single country. The fact that you are getting 0% consistently really does mean that among the ~600,000 SNPs read by the 23 chip, none of them match with native italians.

    Try uploading your raw DNA to GEDMATCH and run it through the K36 Eurogenes test. They have a specific Italian population in there.

  15. #9
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    Paternal haplogroup is G-l30


    Quote Originally Posted by Erlembaldo View Post
    What is your Y-DNA haplogroup? Since you inherit that from your main paternal line it could give a hint to his possible origins.

  16. #10
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    Nobody mentioned the matches. Check your closest matches and their ancestry(easy on 23andme).Family names are pretty distinct too ; )
    Report your DNA Family statistics (Ancestry tab-->DNA Family ).

    ..and the "ancestor birthplaces" of your genetic matches (Tools-->DNA relatives-->Ancestor Birthplaces)

    The G-L30 haplogroup kinda draws you south too :

    https://www.yfull.com/tree/G-L30/

    Unfortunately 23andme are not very excited about testing deeper clades of this particular Hg,so you may want to perform further testing at FT or YSEQ.

    I would also upload the raw file here and there (what is the verision of the 23andme chip used? v4 or v5? Some site are still not ready to accept the latter version..must use Genesis site on Gedmatch.com).

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