Announcement

Collapse
No announcement yet.

Father/Son tested and match at 67 markers with GD of 2. How is this possible?

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

  • Father/Son tested and match at 67 markers with GD of 2. How is this possible?

    I tested to 67 markers and have my results.
    My dad tested to 111 makers and he just got his results.

    We match at 67-markers with a GD of 2? I wouldn't have thought there would be any Genetic distance between a father and son. Could this be a bad test?

  • #2
    Originally posted by chills View Post
    I tested to 67 markers and have my results.
    My dad tested to 111 makers and he just got his results.

    We match at 67-markers with a GD of 2? I wouldn't have thought there would be any Genetic distance between a father and son. Could this be a bad test?
    No, there was already a poster reporting GD of 2 in a father/son pair when using 67 markers.

    See the thread ydna 67 match http://forums.familytreedna.com/showthread.php?t=35648

    W.

    P.S.
    Yes, such situations are rare, and intuitively for father/son one would only expect GD to have values of 0 or 1. However, STR mutations are independent, so larger Genetic Distances are significantly less probable to occur, but not unlikely to occur.
    Last edited by dna; 6 February 2015, 12:43 PM.

    Comment


    • #3
      Originally posted by chills View Post
      I tested to 67 markers and have my results.
      My dad tested to 111 makers and he just got his results.

      We match at 67-markers with a GD of 2? I wouldn't have thought there would be any Genetic distance between a father and son. Could this be a bad test?
      To ease your mind you could get a FF test for you and your father. I think that they are a great test for the money and you will learn a lot of stuff from them about yourself.

      Comment


      • #4
        Originally posted by chills View Post
        We match at 67-markers with a GD of 2? I wouldn't have thought there would be any Genetic distance between a father and son. Could this be a bad test?
        If all father/son pairs where exact matches then you would be an exact match with all of your paternal ancestors and all of their male line descendants.

        Your case sounds like very good results to me.

        Did you know that the president and CEO of FTDNA is not an exact match with his father at 25 markers?

        Comment


        • #5
          There has to be some possibility of a mutation, or else all males on earth would have the same YDNA. The probability is fairly small (or else YDNA would be useless for predicting close relationships), but it's there. I'm GD1/Y67 to my father.

          Comment


          • #6
            My father and his paternal 1st cousin are 4GD at the 37 and 67 marker level.

            My Uncle and same cousin are 3GD @ 37 markers

            My father and his brother are 1 GD @ 37 markers. Difference is my father registers a 2 step at DYS576 and my Uncle has only a 1 step.

            I have been contemplating testing another of my uncles to see if the 4GD or the 3GD (2 step vs 1 step at DYS576)happened in my Grandfather or if my father had an additional mutation.

            Comment


            • #7
              A couple of years ago, or so, there was a post from someone who was a 10/12 match to his son. I can't remember if they ever tested more markers.

              Comment


              • #8
                My 3rd cousin and I were GD0 @ 67. When he and I tested for 111 markers we were GD1. I then tested brother, 1st and 2nd cousins for the different marker, DYS710. They are all 30 and I am 31. They just nodded and smiled.

                Comment


                • #9
                  My grandfather has a match to a man and they share a common Y ancestor at the 4th great grandfather level. They match at 12 and 25 markers, GD1, and don't match at 37 markers even though they are both tested at least to that level. The 2 mismatches are:

                  DYS389-II @ 31 vs 32 and CDY @ 36-38 vs 36-39

                  The other man is testing to see if his terminal snp is the same as my grandfather's, should be, and it's a rare lineage (R-CTS1751). They both share the same surname, genealogy is confirmed.

                  Why don't they match at the 37 marker level?

                  Comment


                  • #10
                    My husband has a 2nd cousin 1x removed and they have a GD1 and he has a 2nd cousin with a GD0 at the Y37 level.

                    I have two 2nd cousins with a GD1 at the Y37 level.

                    Comment


                    • #11
                      This is very interesting. I had my brother's Y tested then did his FF only to find out we're half siblings. He has an exact 24 marker match to a surname that coincidentally lived in the same town that we did when we were born! A semi-small Midwest town that currently has a population of about 61,000.
                      I believe I have stumbled on my brother's paternal biological family. I have contacted the family and they have ordered to 37 markers, where I had my brother tested. If there is a GD of 1, then he still is considered a viable match. Thanks to whomever started this thread.

                      Comment


                      • #12
                        Mutations

                        I am looking for information about genetic distances etc. in relation to my father's testing. I came across this post. I would like to know - Does a man's mother's dna effect the mutations at all?
                        I have tested my father at the 37 marker level & just upgraded it to the 67 level. (results not in yet.) So far my father, surname Maddocks, matches to 3 men with the surname Jewett at a 0 GD distance, 5 men with the name Jewett at 1 GD, 2 Jewett's at 2 GD, 1 at 3GD and 1 at 4GD.
                        I have no known Jewett's in our tree however they were in the area in which our ancestors lived. Is it possible that a female Jewett is part of our equation?
                        Any help is appreciated!

                        Comment


                        • #13
                          Sounds like your Father could have been adopted?

                          Comment


                          • #14
                            Originally posted by suzanneMADGAG View Post
                            I am looking for information about genetic distances etc. in relation to my father's testing. I came across this post. I would like to know - Does a man's mother's dna effect the mutations at all?
                            I have tested my father at the 37 marker level & just upgraded it to the 67 level. (results not in yet.) So far my father, surname Maddocks, matches to 3 men with the surname Jewett at a 0 GD distance, 5 men with the name Jewett at 1 GD, 2 Jewett's at 2 GD, 1 at 3GD and 1 at 4GD.
                            I have no known Jewett's in our tree however they were in the area in which our ancestors lived. Is it possible that a female Jewett is part of our equation?
                            Any help is appreciated!
                            Females don't have a Y chromosome.

                            Comment


                            • #15
                              Originally posted by Littlest bit View Post
                              My grandfather has a match to a man and they share a common Y ancestor at the 4th great grandfather level. They match at 12 and 25 markers, GD1, and don't match at 37 markers even though they are both tested at least to that level. The 2 mismatches are:

                              DYS389-II @ 31 vs 32 and CDY @ 36-38 vs 36-39

                              The other man is testing to see if his terminal snp is the same as my grandfather's, should be, and it's a rare lineage (R-CTS1751). They both share the same surname, genealogy is confirmed.

                              Why don't they match at the 37 marker level?
                              Good question as they should match at 35 out of 37. Are both profiles set to receive 37 marker matches on the "Match and Email Settings" page in their accounts? If so you would need to contact customer service as they should show as matches to one another.

                              Comment

                              Working...
                              X