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The tests shown below analysed 12 markers on the Y-chromosome. The first column in the Table gives the person that provided the test sample.
The 1st line of the table contains the Marker number and the 2nd line shows the Dys numbers; these are abbreviations of the chemical names of the Markers (e.g. Dys 393 or Dys 389i etc).
The 3rd to 5th lines are the Marker values, i.e. the number of repeat beads in the marker chain for Leslie and Alan Peacock. Results for Bill Burgar are shown to illustrate that the results vary considerably if the people do not have the same male ancestors.
|
Marker No. |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
12 |
|
|
393 |
390 |
19 |
391 |
385a |
385b |
426 |
388 |
439 |
389i |
392 |
389ii |
|
Leslie Peacock |
14 |
25 |
15 |
10 |
11 |
14 |
12 |
12 |
10 |
13 |
11 |
31 |
|
Alan Peacock |
14 |
24 |
15 |
10 |
11 |
14 |
12 |
12 |
10 |
13 |
11 |
31 |
|
Bill Burgar |
13 |
24 |
14 |
11 |
12 |
14 |
12 |
12 |
14 |
13 |
13 |
29 |
The sequence of numbers for Leslie Peacock e.g. 14, 25, 15, 10, 11, 14, 12, 12, 10, 13, 11, 31 is referred to as a ‘DNA signature’.
To have any real chance of two persons being related they would need to have 11/12 or 12/12 markers in common.
It can be seen that Alan and Leslie may be related on this basis, since they only differ by one marker (Marker No 2 - DYS 390)
In contrast, Bill Burgar differs by at least 7 markers, and thus his earliest male (Burgar) ancestor is totally unrelated to the earliest male Peacock
