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Common maternal ancestor but different haplogroups

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  • ltd-jean-pull
    replied
    Originally posted by ltd-jean-pull View Post
    Sara can not be the matrilineal ancestor of both you and the other group of people. She can be the matrilineal ancestor of either you or them, or neither, but not both.
    I got that totally wrong then. I'm glad it has been resolved.

    Leave a comment:


  • Ann Turner
    replied
    Originally posted by Stathoulisjp View Post
    Ann, my mother's test results classify her as Haplogroup K.

    Family Tree DNA attribute the error to a technical bug: "I am writing to let you know that the issue with your and your mother's mitochondrial haplogroups was found to be a technical bug and has now been resolved. You both come from haplogroup K, and your mother's account shows your full mitochondrial subclade to the highest level of specificity (her sample has had more extensive mitochondrial testing than yours, which is how this was specified)."

    Thank you for your interest.
    Thanks for the follow-up. All is well now.

    Leave a comment:


  • Stathoulisjp
    replied
    Originally posted by Anizio View Post
    There is one important possibility to consider, and its the first thing that came to mind when I read

    "A researcher has"

    People make mistakes, especially lazy "professions" and uninformed amateurs.

    I'd have someone else go over your genealogy information to confirm it is actually accurate and there is not an error where you have accidentally traced the line of someone with the same name at the same time in the same place...but who was a different person than your ancestor.
    Anizio, my mother's test results which I received a few days ago classify her as Haplogroup K.

    Family Tree DNA attribute the error to a technical bug: "I am writing to let you know that the issue with your and your mother's mitochondrial haplogroups was found to be a technical bug and has now been resolved. You both come from haplogroup K, and your mother's account shows your full mitochondrial subclade to the highest level of specificity (her sample has had more extensive mitochondrial testing than yours, which is how this was specified)."

    Thank you for your interest.

    Leave a comment:


  • Stathoulisjp
    replied
    Originally posted by Ann Turner View Post
    The mtDNA backbone test is not a stand-alone test, so the help desk may not be familiar with the concept. It's mentioned in this FAQ:

    https://www.familytreedna.com/learn/...st-will-learn/

    But if your mother's results are in progress, they should settle the issue.
    Ann, my mother's test results classify her as Haplogroup K.

    Family Tree DNA attribute the error to a technical bug: "I am writing to let you know that the issue with your and your mother's mitochondrial haplogroups was found to be a technical bug and has now been resolved. You both come from haplogroup K, and your mother's account shows your full mitochondrial subclade to the highest level of specificity (her sample has had more extensive mitochondrial testing than yours, which is how this was specified)."

    Thank you for your interest.

    Leave a comment:


  • Stathoulisjp
    replied
    Updated reply from help desk: "There is no backbone haplogroup test for mtDNA tests. All of our mtDNA tests will determine the backbone haplogroup of the tester. The Full Mitochondrial Sequence can determine the haplogroup designation or more detailed haplogroup as well."

    I'll hold on for my mother's results.

    Thanks again

    Leave a comment:


  • Ann Turner
    replied
    Originally posted by Stathoulisjp View Post
    @ Ann, by way of keeping you in the picture, I checked with help desk about the backbone test. They responded 'A backbone test is a SNP test designed to determine your paternal haplogroup by examining your y chromosome. It is not related to your maternal haplogroup'.

    I am waiting for my mother's results and will then consider doing more detailed MtDNA tests.
    The mtDNA backbone test is not a stand-alone test, so the help desk may not be familiar with the concept. It's mentioned in this FAQ:

    https://www.familytreedna.com/learn/...st-will-learn/

    But if your mother's results are in progress, they should settle the issue.

    Leave a comment:


  • Stathoulisjp
    replied
    Originally posted by Ann Turner View Post
    ... I'd suggest writing to the help desk and asking if the backbone test has been done.

    @ Ann, by way of keeping you in the picture, I checked with help desk about the backbone test. They responded 'A backbone test is a SNP test designed to determine your paternal haplogroup by examining your y chromosome. It is not related to your maternal haplogroup'.

    I am waiting for my mother's results and will then consider doing more detailed MtDNA tests.

    Leave a comment:


  • Stathoulisjp
    replied
    Originally posted by Anizio View Post
    There is one important possibility to consider, and its the first thing that came to mind when I read

    "A researcher has"

    People make mistakes, especially lazy "professions" and uninformed amateurs.

    I'd have someone else go over your genealogy information to confirm it is actually accurate and there is not an error where you have accidentally traced the line of someone with the same name at the same time in the same place...but who was a different person than your ancestor.
    Agreed, thank you Anizio. I am new to this and need to balance enthusiasm with caution.

    Leave a comment:


  • Anizio
    replied
    There is one important possibility to consider, and its the first thing that came to mind when I read

    "A researcher has"

    People make mistakes, especially lazy "professions" and uninformed amateurs.

    I'd have someone else go over your genealogy information to confirm it is actually accurate and there is not an error where you have accidentally traced the line of someone with the same name at the same time in the same place...but who was a different person than your ancestor.

    Leave a comment:


  • Emona
    replied
    Ann, thank you for your explanation.

    Leave a comment:


  • Stathoulisjp
    replied
    @ Ann, very useful thank you. My MtDNA results were completed in May 2012. I'll contact the help desk regarding the backbone test.

    Leave a comment:


  • Ann Turner
    replied
    Has it been a very long time since you received your mtDNA results? FTDNA implemented a "backbone" haplogroup test some years ago, which tests a SNP in the coding region to determine the top-level haplogroup. It should be able to distinguish between A and K. I'd suggest writing to the help desk and asking if the backbone test has been done.

    Y is a special code for a mixture of C and T in your cells. This mixture is called heteroplasmy. Virtually everyone would have some heteroplasmy if we could look at every single cell individually, but it's only reported when it reaches a level of 20%. 16093 happens to be a hotspot for heteroplasmy.

    Leave a comment:


  • Stathoulisjp
    replied
    @ Emona, thank you. It makes sense that the limited test can produce erroneous haplogroup categorization.

    It makes sense too that I should do a more detailed test to resolve the haplogroup inconsistency.

    My matrilineal ethnic background is more likely to be K, with my maternal great-grandmother being a South African Afrikaner almost certainly of Dutch descent.

    Leave a comment:


  • Emona
    replied
    This is becoming interesting.

    There is only HVR1 result for you. That is, only a small part of the mtdna molecule (the part called HVR1) was tested.

    Sometimes, rarely, when there is only HVR1 result available, the mtdna haplogroup can indeed be assigned wrong.
    Why? Because rarely, only HVR1 can be equal or similar in two different haplogroups. The difference is visible in more detailed result.

    If this is what happened in your case, it would be possible that you are a K, and maybe even a matrilineal relative of the same Sara.

    A more detailed test, that is, adding
    -at least HVR2 (another part of mtdna molecule),
    -or, in ideal case, the whole sequence (complete molecule), would show correct haplogroup without any doubt, and also more detailed, with sub-group.

    Just a thought: as far as I can see, A is mostly AmericanNative/Asian. K is more European, but also West-Asian, and parts of Africa. How does this sound compared to your matrilineal ethnic background?

    By the way, I am not a scientist. Can anyone please tell me what does T16093Y mean? I mean the "Y". Is this instead of D-deletion? No result-unknown? I only know of A/T/C/G substitutions, insertions (like .1A) and deletions (marked - or D).

    Leave a comment:


  • Stathoulisjp
    replied
    Some more data which I'd appreciate input on. My sequence is identical to theirs (the group of 7) with the following exception: my first sequence result is T16093Y whereas the group of 7 are either T16093Y or T16093C. Is it possible to share the sequence bar this one exception, yet not share the haplogroup?

    My sequence (A haplogroup)
    T16093Y, A16129G, T16187C, C16189T, T16223C, T16224C, G16230A, T16278C

    Their sequence (K or K1a-T195C! haplogroup)
    T16093C or T16093Y, A16129G, T16187C, C16189T, T16223C, T16224C, G16230A, T16278C
    C146T, C152T, A247G, C497T, 522.1A, 522.2C, 315.1C, 522.3A, 522.4C

    Leave a comment:

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