BLAIR DNA Project


James Blair & Mary Colbert

Four Participants claim to descend from James Blair and Mary Colbert. Their 25 marker test results are shown below.
Marker 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
  DYS#
Part
ID#
3
9
3
3
9
0
1
9
*
3
9
1
3
8
5
a
3
8
5
b
4
2
6
3
8
8
4
3
9
3
8
9
i
3
9
2
3
8
9
ii
4
5
8
4
5
9
a
4
5
9
b
4
5
5
4
5
4
4
4
7
4
3
7
4
4
8
4
4
9
4
6
4
a
4
6
4
b
4
6
4
c
4
6
4
d
5674 13 23 13 10 13 20 12 12 13 12 14 28 17 9 10 11 11 21 14 19 30 15 16 16 17
14934 13 24 13 10 16 17 11 12 12 13 11 30 16 9 9 10 11 25 14 20 31 14 16 16 17
75036 13 24 14 11 10 14 12 12 12 13 13 29 17 9 10 11 11 22 14 19 30 15 16 16 17
83525 13 24 14 11 10 14 12 12 12 13 13 29 17 9 10 11 11 22 14 19 30 15 16 16 17
 
25 Marker Matches
The table below shows the number of mismatches each participant has with any other participant in the group.
Marker Mismatches
  5674 14934 75036 83525
5674   15 9 9
14934 15   14 14
75036 9 14   0
83525 9 14 0  
It is clear from this table that the only two participants who share a common ancestor are #75036 and #83525 who match exactly on all 25 markers. According to their pedigrees, they share a common grandfather. Participants #5674 and #14934 do not share a common ancestor with anyone in the group.
 
Pedigree Chart
The chart belows shows that the 4 participants have 3 distinct lines back to Colbert Blair (son of John Blair and Mary Colbert) and Sarah Morgan. They also have 3 distinct 25-marker signatures that clearly show that these three lines are not related.

 
Conclusions
Based on the DNA test results of these four participants the one absolute conclusion we can draw is that only one the above lines may actually descend from Colbert Blair and Sarah Morgan. It is impossible based on the current results to know line this may be.

It is also possible that one or more of the participants is mistaken about his pedigree or that somewhere along the line a nonpaternal event took place.

For the time being the James Blair and Mary Colbert line will remain a mystery. Further testing is required if this line is going to sorted out.

The full pedigree chart for #5674 can be viewed by clicking here
 

 

 

  Contact the Blair DNA Project Coordinator 

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