I have 5 autosomal DNA tests (from cousins and siblings of each other) that are theoretically all 5th cousins, once removed, from another DNA test. Using GED Match autosomal compare, I found these matches, all in different chromosomes with:
- minimum threshold size 300 SNPs
- mismatching-bunching limit 150 SNPs
Minimum segment cM 4.0 cM:
- Wilson:
- Chr 1 120,064,541 to 149,717,828 4.2 cM 822 SNPs
- Chr 11 130,961,134 to 132,394,867 4.1 cM 546 SNPs
- Chr 16 28,165 to 1,175,315 4.2 cM 310 SNPs
- Chr 18 1,799,217 to 3,064,785 4.7 cM 425 SNPs
- Chr 18 4,128,311 to 5,452,488 4.7 cM 444 SNPs
- Meredith (Sister of Wilson):
- Chr 1 243,385,031 to 245,045,127 4.2 cM 514 SNPs
- Chr 5 168,169,228 to 169,810,385 4.1 cM 617 SNPs
- Carol:
- Chr 6 14,175,149 to 16,601,341 4.3 cM 672 SNPs
- Chr 19 53,015,545 to 55,106,529 5.2 cM 618 SNPs
- Lawrence:
- Chr 12 11,649,134 to 12,812,400 4.2 cM 422 SNPs
- Chr 15 93,109,846 to 94,320,114 4.2 cM 377 SNPs
- Chr 19 8,492,086 to 9,996,711 4.5 cM 340 SNPs
- Clyde (brother of Lawrence):
- Chr 13 24,623,069 to 26,284,031 4.2 cM 463 SNPs
- Chr 15 93,109,846 to 94,320,114 4.2 cM 378 SNPs
- Wilson:
Do these results look like a 5th cousin once removed relationship? Should I compare with different threshold values? I've already adjusted down the minimum threshold size to 300 SNPs from 400 SNPs.
For reference, here is a compare of believed 3rd cousins using the same parameters (Mark vs. Edward):
- Chr 1: 5.5 cM 324 SNPs
- Chr 7: 23.4 cM 2,273 SNPs
- Chr 8: 14.3 cM 3,218 SNPs
- Chr 20: 5.1 cM 356 SNPs
And here is a believed 3rd cousin once removed compared (Edward vs. Louis):
- Chr 15: 6.6 cM 380 SNPs
- Chr 22: 5.1 cM 316 SNPs
And here is another believed 3rd cousin once removed compared (Mark vs. Louis):
- Chr 10: 7.8 cM 693 SNPs
Here is 3rd cousin once removed (Edward vs. Wilson and Meredith, both children of Mark):
- Wilson vs. Edward:
- Chr 7 5.8 cM 766 SNPs
- Chr 7 4.2 cM 445 SNPs
- Chr 8 14.0 cM 3,126 SNPs
- Chr 17 4.6 cM 313 SNPs
- Chr 17 4.5 cM 543 SNPs
- Chr 18 4.8 cM 427 SNPs
- Chr 20 5.0 cM 366 SNPs
- Meredith vs. Edward:
- Chr 7 24.0 cM 2,340 SNPs
- Chr 8 12.4 cM 2,751 SNPs
- Chr 17 4.6 cM 314 SNPs
- Chr 17 4.5 cM 545 SNPs
- Chr 18 4.8 cM 428 SNPs
- Chr 20 4.4 cM 304 SNPs
- Chr 20 4.6 cM 475 SNPs
And here is 4th cousin (Louis vs Wilson and Meredith, both children of Mark)
- Wilson vs. Louis:
- Chr 2 4.2 cM 907 SNPs
- Chr 5 4.4 cM 651 SNPs
- Chr 10 4.3 cM 340 SNPs
- Chr 12 4.0 cM 474 SNPs
- Chr 15 5.0 cM 340 SNPs
- Meredith vs. Louis:
- Chr 2 4.2 cM 909 SNPs
- Chr 10 5.3 cM 451 SNPs
- Chr 12 4.0 cM 474 SNPs
- Chr 15 5.0 cM 340 SNPs
- Chr 17 4.9 cM 304 SNPs