Tuesday, June 7, 2011

Maryland Dowells with 111 Marker Results


Several of my distant cousins who descend from the same ancestor who lived in southern Maryland three hundred years ago have taken a Y-chromosome DNA test. Five of us recently expanded our tests to 111 markers. The results are just back.

Matches with Philip, Sr. Dowell, (d. 1733)
Dave:  111/111
Ron & Barry: 110/111
Mark: 109/111
George: 105/111

Based on DNA results alone here are the probabilities that each of us is related to each other within 8 generations.
Barry
Dave
George
Mark
Ron
Barry
100.00%
Dave
98.69%
100.00%
George
24.33%
38.24%
100.00%
Mark
87.47%
95.14%
13.83%
100.00%
Ron
95.24%
98.69%
24.33%
87.47%
100.00%

None of these gentlemen share any of their mutations from the presumed DNA of Philip, Sr. with any of the other four.

However, Mark shares one of his mutations with Eugene. Both of them are descendants of first son, Philip, Jr. Eugene has been tested to 67 markers.

In addition, George shares two of his mutations with James Leroy, Sr. Both of them are descendants of second son, John. James Leroy has been tested to 37 markers.

Barry, Dave and Ron are descendants of third son, Peter, Jr.

The five of us range from 7 to 9 generations removed from Philip, Sr.

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