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Y-DNA Evidence

Y-DNA Evidence


DNA is the molecule in our cells that contains our genetic information.  Y-DNA, which is a DNA molecule existing only in males, is passed on from father to son with very few changes over time.  As a result, it can be analyzed to determine a male’s paternal heritage.  By comparing the Y-DNA analyses or tests of two individuals, we can gain insight into how closely related they may be.

Results of Y-DNA tests are stated as a series of numbers.  Each number is indicative of the DNA structure or pattern that exists at specific points, often called markers, along the strands of one’s DNA.  The more similar the numbers in the tests of two individuals, the more similar their DNA, and the more likely it is that they are closely related.

In the last three lines of the exhibit below we show the test results of three individuals.  (The numbers and letters highlighted in blue at the top of the table are the scientific designations for each of the markers in a 37 marker Y-DNA test, and may be ignored for our purposes.)  The individual whose DNA signature is shown in the first results line (the third line up from the bottom) is one of the three Dotys who we have said is a descendant of John7 Doty, but who we also have said carries Dunham DNA.  In the next line down are the test results of a representative Dunham shown on the Dunham/Singletary Family Connections website.  In the last line of the table we have the test results of a representative Doty taken from the website of the Doty Doughty DNA Group.

Clearly the descendant of John7 Doty is much more closely related to the representative Dunham whose results are shown on the line below him than he is to the representative Doty whose results are shown on the last line of the table.  There is only one difference, highlighted in yellow, between the DNA signature of John7 Doty's descendant and that of the Dunham in the exhibit, while there are thirty one differences, again highlighted in yellow, between the DNA signature of John7's descendant and that of the Doty in the last line of the exhibit.

 

                                                      G                    
                                                      A                    
          3 3       3   3   4 4             4 4 4 4   T Y Y         C C    
  3 3   3 8 8 4 3 4 8 3 8 4 5 5 4 4 4 4 4 4 6 6 6 6 4 A C C 4 6 5 5 D D 4 4
  9 9 1 9 5 5 2 8 3 9 9 9 5 9 9 5 5 4 3 4 4 4 4 4 4 6 H A A 5 0 7 7 Y Y 4 3
Participant 3 0 9 1 a b 6 8 9 -1 2 -2 8 a b 5 4 7 7 8 9 a b c d 0 4 IIa IIb 6 7 6 0 a b 2 8
Doty/Dunham?
13 22 15 10 13 14 11 14 11 12 11 28
14 8
9
8
11 23 16 20
28 12 14 15 17 11 10 19 21 14 14 16 19 34
37
13 10
Dunham 13 22 15 10 13 14 11 14 11 12 11 28 14 8 9 8 11 23 16 20 28 12 14 15 17 11 10 19 21 14 14 16 18 34 37 13 10
Doty 13 24 14 11 11 14 12 12 12 14 13 30
16 9
10
11
11 25 15 19
29 15 15 17 17 11 11 19 23 16 15 18 16 40
40
11 12

If you believe you are a direct male descendant of David5 Doty and if you would like to help us to conclude with greater certainty than we now have that John7 Doty was or was not fathered by a Dunham, we hope you will participate in the Doty Doughty DNA Group projectIf our working hypothesis that John7 was fathered by a Dunham is correct, no direct male descendant of his should be carrying Doty DNA.  On the other hand, Doty DNA should be evident in most of the direct male descendants of John7's brothers and paternal uncles.  As noted elsewhere, we strongly recommend that your test include a minimum of 37 markers to insure definitive interpretation of the results. If you have any questions, Jerry Doty the webmaster of this site would be happy to answer them, as would we.

If you believe that you are a direct male descendant of Jonathan2 Dunham and if you would like to help us identify at least the Dunham line from which John7's father likely came, we hope you will participate in the DNA project on the Dunham/Singletary Family Connections website.  Again, we strongly recommend that your test include a minimum of 37 markers to insure definitive interpretation of the results.  If you have any questions, Paul Dunham the webmaster of this website would be happy to answer them, as would we.

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If you are interested in learning more about the use of Y-DNA tests for genealogical purposes, we would recommend the following websites.

The Pilgrim Edward Doty Society Y-DNA Primer

http://blairdna.com/dna101.html

http://www.familytreedna.com/

http://pcdunham.net/Index.html

For those interested in learning about DNA tests to discover their deeper ancestral origins, the broad maternal and paternal population groups to which they might belong going back to pre-historic times, we would suggest that they look into the National Geographic’s Genographic Project.  More specifically, we would recommend the following websites and the book “Deep Ancestry” written by Spencer Wells, the Director of the Society’s Genographic Project.

https://genographic.nationalgeographic.com/genographic/index.html

http://www.familytreedna.com/

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