How closely are they related

The first test was processed by FTDNA with their relative finder. This test is like the one that’s offered by ancestry.com and called there everything test. This test is an autosomal test. It looks at samples of your DNA from all chromosomes except for the Y chromosome.

Our four candidates Alton Earl Jim and Harry are fourth cousins twice removed. The relationship between Harry and Jim are second cousin once removed but they also have fourth cousin removed relationships on two other lines. We know these relationships through standard genealogical research which is well-documented.

Using the GEDmatch 3D Chromosome Browser we get a nice chart showing the relationship between our four candidates. Earl and James share no DNA the rest of the relationships include one segment of the DNA. Harry and Jim share five segments because of their closer relationship.

Segments in common:

Kit Name T579239 T055537 T829743 T918718 Tot. Segments Largest cM
T579239 Earl Rader 0 2 2 4 31.8
T055537 James Lee Rader 0 5 1 6 22.1
T829743 Harry Rader 2 5 1 8 22.1
T918718 Alton Rader 2 1 1 4 31.8

Autosomal DNA shared between pairs of relatives at the fourth cousin level normally share 13 cM but the fourth cousins once removed would only share 6 cM. So in our circumstance with the twice removed we would expect 3 cM.

The expected level between Harry and Jim are that of second cousins once removed which on average 106 centiMorgans The expected level between Harry and Jim are that of second cousins once removed which on average 106 centiMorgans. Using this table you can see the share five segments.

 

Total Shared cM (Chr 1-22):

Kit Name T579239 T055537 T829743 T918718
T579239 Earl Rader None 19.7 48.3
T055537 James Lee Rader None 78.3 5.1
T829743 Harry Rader 19.7 78.3 11.4
T918718 Alton Rader 48.3 5.1 11.4

Summary by Chromosome:

Chr Tot. Matching Segments
for all individuals.
B36 Graphic Posn Range Largest
segment
From To
1 0 72017 247185615 None
2 0 8674 242697433 None
3 1 36495 199322659 20.2
4 1 49009 191200760 31.8
5 0 78452 180630744 None
6 0 100815 170761395 None
7 0 139250 158812247 None
8 2 154984 146264218 11.4
9 2 36587 140208462 16.5
10 0 84172 135358259 None
11 0 188510 134445626 None
12 0 61880 132288869 None
13 0 17956717 114121631 None
14 2 18325726 106358708 21.6
15 1 18294933 100278685 9.2
16 0 28165 88690776 None
17 1 8547 78653169 5.1
18 0 3034 76116152 None
19 0 211912 63788972 None
20 0 9098 62382907 None
21 0 9849404 46924583 None
22 1 14494244 49558258 22.1
23 0 2321 154889941 None

Segment Details:

Kit1 Kit2 Chr Build 36 cM
Kit Nbr. Name Kit Nbr. Name From To
T055537 James Lee Rader T829743 Harry Rader 3 10215159 25460760 20.2
T579239 Earl Rader T918718 Alton Rader 4 121202707 157186835 31.8
T055537 James Lee Rader T829743 Harry Rader 8 140535029 143182478 5.2
T829743 Harry Rader T918718 Alton Rader 8 135910061 141152797 11.4
T579239 Earl Rader T918718 Alton Rader 9 129350655 136524980 16.5
T579239 Earl Rader T829743 Harry Rader 9 136263069 140147760 13.6
T055537 James Lee Rader T829743 Harry Rader 14 88480306 97899028 21.6
T579239 Earl Rader T829743 Harry Rader 14 30421536 32553908 6.1
T055537 James Lee Rader T829743 Harry Rader 15 88047217 91532308 9.2
T055537 James Lee Rader T918718 Alton Rader 17 27056533 29380126 5.1
T055537 James Lee Rader T829743 Harry Rader 22 43130670 49528625 22.1

These results are based on the 5.0 cM / 500 SNP threshold that you specified on the preceeding page. Because of that,
these results may be somewhat different than those obtained in the one-to-one and one-to-many utilities, which
use the site default values. Default values vary depending on the testing company that provided the kit.

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cM color coding < 3 cM 3 – 5 cM 5 – 10 cM 10 – 20 cM 20 – 50 cM 50 – 100 cM Over 100 cM

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Software Version: Apr 12 2016 20:55:43

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