AUTOSOMAL DNA X-MATCH

Arthur B. Staples Jr. & Eleanor L. Robertson Smith CG(C)

staples@naples.net

18 December 2014, revision 14 January 2015  

EXPLANATION OF A MATCH ON THE X CHROMOSOME (X-chr):
Information taken, in-part, with permission from "DNA and Family Research" by Maurice Gleeson.

T
he Autosomal X-chr can only be passed down certain lines. Daughters receive one X-chr from each parent; sons receive an X-chr only from their mother, but a Y-chr from their father.

F
or this reason, as you go back along your ancestral lines, anytime you hit a male ancestor, the X-chr line cannot continue back through the male ancestor's father - it can only continue through his mother.

T
his effectively excludes all the ancestors on the paternal side of each male encountered as you go back through the family tree.  



 

STUDY USING OUR AUTOSOMAL X-chr PATHWAYS AND GENEALOGY RELATIONSHIPS:

a) Background: Family Tree DNA (FTDNA) Autosomal (atDNA) X-Match, with Arthur B. Staples, Jr.,

Other DNA information for ABSjr, Y-DNA Haplogroup R1b-FGC13609; mt-DNA Haplogroup U5a1a2b1.
Match Name: Eleanor L. Robertson Smith; Relationship Range: 2nd - 3rd cousin; Match Date: 18 Dec 2014
Total Shared cM's: 153.73; Shared DNA Segments: 21; Shared X-Chr 2; Longest (Segment) Block: 36.79 on chromosome  # 22 with 6,040 matching SNP's (re; FTDNA Cromosome Browser, see p3).

b) Identify the Common Ancestor of the X-chr Match Between -

Arthur Batchelder Staples, Jr.

Mother, Gytha Boyd (b1908), name change to Dorothy Harriet Ward, wife of Arthur B Staples (b1908).
Grandfather, Joseph F. Boyd (b1888) is the 1st husband of Beatrice Jeanette Cann (b1889).
Great-grandmother, Edna Delaney (b1863) is the 1st wife of Jacob Gardner Boyd (b1859).  
2x Great-grandmother, Ellen Jane Pennell (b1835) is the 2nd wife of John Delaney (b1830).

Arthur B. Staples, Jr., is the 2nd cousin 1x removed of ELRS.
Gytha Boyd name change to Dorothy H. Ward is the 2nd cousin of ELRS.
Joseph F. Boyd is 1st cousin 1x removed of ELRS.
Edna Delaney is the grandaunt of ELRS.
Ellen Jane Pennell is the great-grandmother of ELRS.

Eleanor Louise Robertson Smith, CG(C)
Mother, Reta Mae Delaney (b1895) is the wife of Lewis Victor Robertson (b1896).
Grandfather,  Lemuel Delaney(b1857) is the husband of Mary Brenton Landers (b1867).   
Great-grandmother, Ellen Jane Pennell (b1835) is the 2nd wife of John Delaney (b1830).

Eleanor L. Robertson Smith is the 2nd cousin 1x removed of ABSjr.
Reta Mae Delaney is the 1st cousin 2x removed of ABSjr.
Lemuel Delaney is the great-granduncle of ABSjr.
Ellen Jane Pennell is the 2x great-grandmother of ABSjr. 

c) Relationships, centi Morgans (atDNA & X combined) and Percentages of shared DNA.   

According to FTDNA, ELRS and ABSjr share 153.73 cM's and a relationship range of 2nd - 3rd cousins. How do we interpret this information? Documented genealogy to the common ancestor gives our true relationship. At 100% the cM value FTDNA uses is 6766.2, therefore 153.73 cM's / 6766.2 = 2.27% is the amount of our shared DNA according to FTDNA.

Using the FTDNA cM value of 6766.20 for 100%.

1) Mother, father, siblings share about 50% or about 3400 cM's
2) Grandfathers, grandmothers and aunts share about 25% or 1700 cM's
3) Great-grandparents, 1st cousins, great-uncles and, great-aunts, share about 12.5% or 850 cM's. 
4) 1st cousins one time (1x) removed share about 6.25% or 425 cM's
5) 2nd cousins and 1st cousins 2x removed share about share about 3.125% or 212.50 cM's.
**ELRS and ABSjr are 2nd cousins 1x removed sharing 2.27% or 153.73 cM's.
6) 2nd cousins 1x removed share about 1.563% or 106.25 cM's.
7) 3rd cousins, 2nd cousins 2x removed and 2x great-grandparents share about 0.781% or 53.13 cM's.
Ref. - http://www.isogg.org/wiki/Autosomal_DNA_statistics

AUTOSOME TECHNICAL DATA: ABSjr & ELRS
Located in each cell of our body there are 22 pairs of autosomes that are numbered roughly in relation to their sizes. Chromosome #1 has approximately 2,800 genes, while chromosome #22 has approximately 750 genes.
We also have an additional pair of sex chromosomes (the X chromosome and the Y chromosome).
(Taken in-part from -http://www.isogg.org/wiki/Autosomal_DNA)

 FTDNA Chr. Browser Chart of 22 chromosomes and the X-chromosome with % of shared DNA added.
See - http://www.isogg.org/wiki/Autosomal_DNA_statistics

Chr[1]
#

Start[2]
Location

End[2]
Location

cM's[3]

%[4]
of
DNA

Number of
Matching
SNP's[5]

1

48745397

53343247

1.5

0.022

700

2

125903732

128050940

2.1

0.031

500

2

135763071

138242472

2.14

0.032

600

2

192764982

196603015

2.11

0.032

500

3

50445051

53585141

1.32

0.02

500

4

176268476

184929383

17.28

0.255

2601

7

98137093

100154581

2.04

0.030

500

9

123744125

125782573

3.11

0.046

500

9

131456657

138455027

9.79

0.145

2255

10

19361160

27928934

10.51

0.157

2396

10

65304118

67462737

1.43

0.021

500

11

47302721

56273717

1.42

0.021

700

12

32965070

38203663

1.27

0.019

500

12

129232760

132287718

6.37

0.094

978

13

50452286

52760743

1.39

0.020

600

15

94993340

100278685

13.22

0.195

1905

19

41311232

43903734

2.47

0.037

500

19

51165416

54593130

8.32

0.123

1010

20

19823492

43374640

21.08

0.312

4700

20

54966696

57735586

8.08

0.119

1091

22

25707796

45772802

36.79

0.544

6040

       

 

 

X

9177483

22802819

22.58

0.334

2175

X

143583122

151050290

16.98

0.251

1275


Table Notes:
[1] Chr # = Numbered Chromosome.
[2] Position on the antosomal chromosome.
[3] cM's = centiMorgans.
[4] % of DNA = At 100% FTDNA uses 6766.2 cM's.
[5] SNP's = Single Nucleotide Polymorphism: A change in the DNA that happens when a single nucleotide in the genome sequence is altered. A person has many SNPs that together create a unique DNA pattern for that individual. ref. FTDNA Glossary of DNATerms.

 

 

STUDY NOTES: Using Genetic Data combined with Genealogy Records.
1) The most important development of this study is that of our common autosomal x-match ancestor, Ellen Jane Pennell (b1835), proves, beyond any shadow of doubt, both our genetic and our genealogy lineages. Awesome!

2) Edna Delaney (b1863) wife of Jacob Gardner Boyd (b1859) is a sister to Lemuel Delaney (b1857) and is the mother of Joseph F. Boyd (b1889). She is the great-grandmother to ABSjr and a grand-aunt to ELRS.

3) Genalogical missing link for ABSjr solved by ELRS. The shared genealogy ancestors of ELRS and ABSjr provided a missing link for ABSjr and his six Mayflower ancestors that are also ancestors of ELRS. The missing link is the surname of the wife of Capt. John Clements (b abt 1715) m Hannah Eaton.

Hannah Eaton (b1730) is a descendant of five signers of the Mayflower Compact. She is the 5th great-grandmother of ELRS, and the 6th great-grandmother of ABSjr.  

Currently ELRS and ABSjr share eleven signers of the Mayflower compact. ELRS has two more signers of the Mayflower Compact for a current total of thirteen.

4) Personal Family History Records:
Eleanor L Robertson Smith, CG(C), Author and Lecturer. Most of her 20 year collection of personal family history books and genealogy records are preserved and held at the Shelburne County Archives & Genealogy Society, Box 248, 168 Water Street, Shelburne, Nova Scotia, BOT 1WO, on-line at http://nsgna.ednet.ns.ca/shelburne

Arthur B. Staples, Jr., Family Historian and genetic hobbyist started family research in 1996 and in 2002 became interested in Y-chromosome STR & SNP DNA (Y-DNA) for researching lineage passed from father to son. At the same time he became interested in mitochondrial SNP DNA (mtDNA) passed from mother to daughter (also to sons but the son cannot pass it on) to help solve genealogy problems and validate relationships.  In December 2014 he became interested in Autosomal DNA (atDNA) as a tool to locate relationships within 5th cousins and help validate genealogy lineages.
His results are shown on-line at - http://freepages.genealogy.rootsweb.com/~staples/index.htm


RESOURCES:
Autosomal Testing by Family Tree DNA (FTDNA) "Family Finder " (FF), http://www.familytreedna.com 

Ahnentafel (Ancestral) Family Tree Reports of -
Arthur Batchelder Staples, Jr.
Eleanor Louise Robertson Smith CG(C)

DNA and Family Research by Maurice Gleeson. Explanation of a match on the X Chromosome (X-chr)  http://dnaandfamilytreeresearch.blogspot.co.uk/2013/05/analysing-dna-matches-step1.htm

International Society of Genetic Genealogists (ISOGG) -

http://www.isogg.org/wiki/Wiki_Welcome_Page

http://www.isogg.org/wiki/Autosomal_DNA

http://www.isogg.org/wiki/Autosomal_DNA_statistics


absj- x-chr match 001

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