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
|
