Announcement

Collapse
No announcement yet.

How many Matches Do You Have?

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • #16
    The gentleman whose ancestors were from Italy indicated that he's done the mtDNA test which showed his Haplogroup and he was concerned with the sample size used to determine the results. But he didn't indicate what he was trying to determine or hoped to discover using the mtDNA test.

    For current genealogy, the mtDNA test is valuable in proving that certain matches come down the narrow maternal lines it tests. That is to say you can prove another person descends from the same maternal link that you have if you have an idea that that person is a possible match.

    But if someone takes the test hoping to discover information about a mother's maternal lines, the mtDNA test is far less useful for that. What the gentleman didn't understand is that not everyone in the world has done the different DNA testing and therefore, not everyone's DNA history is currently available. Taking the test for discovery alone purposes is rather like fishing. You can be fishing in a well stocked pond or an empty pool. A person who tests is taking a chance, as the total size of the mtDNA base is smaller than the autosomal or Y-DNA testing. But what the test can tell you is the first thing that someone doing the test needs to understand. Perhaps FTDNA needs to go into a bit more depth on it's advertising page for those who haven't done any research on their own as to what mtDNA is really all about.

    I took the FMS test knowing that I could be fishing in a pool empty of information about my great grandmother's lines, but I threw my hook in anyway. My FMS Haplogroups is H10c1, with results showing that I have 6 exact matches, and one each at 1,2, and 3 steps. All, but one, have done the FF test and none of them are within the range of being matched as a cousin. Our common ancestress goes back much farther than current genealogy.

    And as for my FF matches, I have a colonial American ancestry and so have a total of 2,195 matches here at FTDNA, and almost 22,500 at Ancestry.com. The difference there is the size of the data bases and the program used to decide match relationships.

    Comment


    • #17
      Keigh, it would interesting to know how many mtDna tests have been done at FTDNA. I have asked that question on the forum but got no response.

      I saw the number once (and have forgotten), but remember it was a surprising small number.

      Comment


      • #18
        Originally posted by gabriel f View Post
        Thank you high734. Where your ancestors from?
        I suppose my origins results is a good place to start on this but I think the results themselves are flawed due to the sample sizes.
        51% British Isles/28% Scandinavian/21% Eastern European

        Now my origins aren't that far off in reality.
        My maternal grandfather is 100% Polish
        My paternal grandfather is 25% Scottish(maybe 50%)/25% German(maybe 0%)/50% Irish.
        My paternal grandmother is 25% British/50% Irish/25% Unknown.
        My maternal grandmother is 62.5% Unknown(haven't ID'd father and unknown origin for great grandfather, assumed Irish)/37.5% German. Her My Origins results: 68% British Isles/14% Scandinavian/10% Asia Minor/ 5% Eastern European/ 2% Finland/N. Siberia

        So if I do all the math out on the above I would be somewhere around: 25% Polish/25% Irish/21.875% Unknown/15.625% German/6.25% Scottish/6.25% British

        Comment


        • #19
          MTDNA has verified our tree.

          Some people stay on the site as some other sites only care about selling the information.

          Comment


          • #20
            Originally posted by marietta View Post
            Keigh, it would interesting to know how many mtDna tests have been done at FTDNA. I have asked that question on the forum but got no response.

            I saw the number once (and have forgotten), but remember it was a surprising small number.
            The mtDNA Testing Comparison Chart at ISOGG, http://isogg.org/wiki/MtDNA_testing_comparison_chart, shows about 200,000 tested at FTDNA. The source was this FTDNA page, accessed in 2013: https://www.familytreedna.com/why-ftdna.aspx, which today says "238,551 mtDNA records in the database," and looks like it was updated this month.
            Last edited by KATM; 11 November 2016, 02:24 PM.

            Comment


            • #21
              Darrol, could expand what you mean with:

              "Some people stay on the site as some other sites only care about selling the information"?

              Comment


              • #22
                keigh
                I think that the gentleman searching about Italians is an specialist teaching for 30 years about population, samples, statistics and scientific investigation design. Then he is fully authoritative. Anything that he was searching, he found the trouble: sample is highly biased. And if only people who can buy tests are tested, then sample remains biased. As costumers searching for family, this is a big limitation. We must to know what we can really expect. What of original object of FTDNA? Found families of customers or prove "other things" and to have a "scientific base" for people to have "certain demands"? (please, don't ask me that explain this, who understand understand, and who not, not.)
                Anyway, is FTDNA obligation make focus in sub-represented populations of the sample. As customer I said: "I had tested Y111, only from Y37 I have matches, and all are English. But I came from Greeks from Father Line. Why?" Because sample is biased and is not responsibility of customers make better the sample, hoping that people in exploited countries buys more tests.
                But as customers, we can do something: to know the limits for operate with limits, don't trusting in absolute verdicts coming from a biased sample. If we don't share what matches we found, what is our real experience in FF, etc, the most of us never will know what we can expect.

                Comment


                • #23
                  Originally posted by gabriel f View Post
                  Darrol, could expand what you mean with:

                  "Some people stay on the site as some other sites only care about selling the information"?
                  I found other sites only want to sell you something but won't fix a problem with an impossible situation like people that had kids born before their parents. Another site just data mines for future profits.

                  Comment


                  • #24
                    Yes, now I understand and agree with you. An other site even lost all Y database of its customers. FTDNA is until today the best option, with or without agenda.

                    Comment

                    Working...
                    X