Tuesday, October 31, 2017

DNA statistics part 2- Maternal side

Mom's DNA results are challenging. About 80 % of my ancestry results are paternal. Mom's grandmother was a first generation American and we don't have a lot of matches from those lines, same for her Choctaw side. That said she has clusters of matches for some groups.



Note: I share 50 percent of my DNA with my parents and my daughter. On Gedmatch that number varies in cM from 3549 for Mom, 3552 for Dad and 3581 for my daughter using my 23andme test. Dad and mom are both on 23andme and my daughter is on Ancestry. For an average I am using 3560 cM as marker for 50%.  Differences are likely due to unreadable (no call) areas from the samples.

Based on the unrealistic 50 % DNA from each parent in each generation, this is what the contributed DNA “should” be for my parents, me and my daughter if every generation was inherited equally at 25 % for each grandparent’s DNA contribution.

Relationship to my Mom/Dad
Percentage
Dad/Mom’s estimated
cM
My estimated cM
My daughters estimated cM
Grandparent
25 %
1780 cM
890 cM
445 cM
Great Grandparent
12.5%
890 cM
445 cM
222.5 cM
G.G. grandparent
6.25%
445 cM
222.5 cM
111.3 cM
G.G.G. grandparent
3.125%
222.5 cM
111.3 cM
55.6 cM
GGGG grandparent
1.563 %
111.3 cM
55.6 cM
27.81 cM
GGGGG grandparent
0.781 %
55.6 cM
27.81 cM
13.9 cM

My parents are only on 23andme and Gedmatch, where I am on Ancestry, 23andme and Gedmatch and my daughter is on Ancestry and Gedmatch only. (I am not using FTDNA or my heritage matches for this table.)  Since most “in common” identified matches will go back to a common ancestor pair (or double the DNA from the above table as “possible”) I wanted to look at the highest match to a known DNA pair for my parents, myself and my daughter. 

Results for my mother’s family are below.

Surname Pair
Relationship to Mom
Mom’s estimated Cm
Mom’s highest match
My estimated Cm
My highest match
My daughters estimated Cm
My daughters highest match
Hager/Adams
Grandparents
3560
NA
1780
NA
890
NA
Hinds/Timmins
Grandparents
3560
2006.1
Aunt
1780
1229
890
609
Hager/Collins
G
Grandparents
1780
590.6
½ 1c
890
218
445
35.1
Adams/Trahern
G grandparents
1780
580.4
1C1R
890
232.5
445
91.8
Hinds/Paxton
G grandparents
1780
43.8
890
100
445
NA
Timmins/ Brampton
G grandparents
1780
300
890
175
445
NA
Hager/Barnett
GG grandparents
890
146
445
42
222.5
25.2
Collins/ Mangum
GG Grandparents
890
37.2
445
15
222.5
NA
Hinds/Crawford
GG grandparents
890
NA
445
28.4
222.5
11.2
Paxton/Douglas
GG grandparents
890
NA
445
NA
222.5
NA
Adams/Rogers
GG grandparents
890
NA
445
NA
222.5
NA
Trahern/
Gardner
GG
grandparents
890
NA
445
NA
222.5
NA
Timmins/Phillips
GG grandparents
890
NA
445
NA
222.5
NA
Brampton/ Spicer
GG grandparents
890
NA
445
NA
222.5
NA
Hager/Whitley
GGG grandparents
445
NA
222.5
23.9
111.3
NA
Barnett/ Bagwell
GGG grandparents
445
97.3
222.5
NA
111.3
NA
Adams/ Unknown
GGG grandparents
445
NA
222.5
NA
111.3
NA
Rogers/ Rodgers
GGG grandparents
445
174
222.5
48
111.3
24.5
Trahern/ Hall
GGG grandparents
445
NA
222.5
N
111.3
NA
Gardner/ Unknown
GGG grandparents
445
NA
222.5
NA
111.3
NA
Collins/Adams
GGG grandparents
445
45.1
222.5
18.3
111.3
19.4
Mangum/ Unknown
GGG grandparents
445
NA
222.5
NA
111.3
NA
Hinds/ Bent
GGG grandparents
445
NA
222.5
28.3
111.3
NA
Crawford/ Wheeler
GGG grandparents
445
NA
222.5
NA
111.3
NA
Paxton/ Brown
GGG grandparents
445
NA
222.5
NA
111.3
NA
Douglas/ Unknown
GGG grandparents
445
NA
222.5
NA
111.3
NA
Timmins/ Hale
GGG grandparents
445
NA
222.5
NA
111.3
NA
Phillips/ Castle
GGG grandparents
445
NA
222.5
NA
111.3
NA
Brampton/ Unknown
GGG grandparents
445
NA
222.5
NA
111.3
NA
Spicer/ Haywood
GGG grandparents
445
NA
222.5
NA
111.3
NA

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