Questions tagged [dna]

For questions about using DNA to further knowledge of family history, relationships, ethnic origin, and overall ancestry. Most common tests include Y-DNA, mitochondrial DNA, and autosomal DNA.

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How do you vet DNA cousin "matches" that reach out to you?

I did the DNA test thing back in January. One of the things I was hoping to get out of it was to make contact with other (distant) cousins. What I didn't think about was putting myself out there for ...
SomeDoug's user avatar
2 votes
1 answer
45 views

Is there a way to declutter Endogamy in DNA comparisons?

I've recently taken an Acestry DNA test to try and confirm my paternal line's great grandfather. After getting the results, I thought I identified the correct one. One of the nearest matched ...
SomeDoug's user avatar
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Adopted first cousin - is her parent my aunt or my uncle?

I have a first cousin who was adopted at birth. My mom had two brothers and a sister. The adoption records are sealed and cannot be viewed due to Florida state law (1969). Is it possible to determine ...
Brian's user avatar
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Confirming my real (genetic) grandfather from 23andMe results

I recently found a photo of my maternal grandparent’s wedding party. I’ll refer to my maternal grandparents as GM (grandmother) and GF (grandfather). I was surprised to see that one of the people in ...
MrAnon1900's user avatar
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0 answers
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Identifying maternal grandfather using DNA

I have recently started the process of grouping my DNA matches on my mother’s side. It's starting to look like the man I thought was my grandfather may not be. I don't have my mother’s DNA but I have ...
Vernpaw Bachman's user avatar
-1 votes
1 answer
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How can I share more DNA with a distant cousin's son than with the distant cousin?

My Heritage has brought up a 0.6% match with a suggested son of a 3rd Cousin / 4th Cousin. He is aged under 20. Their tree is managed by the father aged in his 40's. However, there is only a 0.2% ...
Nevil Pearce's user avatar
0 votes
0 answers
18 views

First Generation/Sibling Match? (using one to one DNA comparison)

Trying to wrap my head around this to determine if this is a legitimate sibling match (?)using report I got on GedMatch (one to one comparison DNA). Report shows: 3557.3 total Autosomal cm/largest 206....
Amy's user avatar
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1 answer
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Unknown grandfather

Is it possible to know if my grandfather is the same person as my cousins grandfather thru DNA? My grandmother and my cousin's grandmother are sisters. All of these grandparents are dead.
Marc Loebe's user avatar
1 vote
1 answer
121 views

Using DNA to identify deceased grandfather

After discovering my grandfather wasn't related (my DNA showed zero relative matches on all sites for this man) I had my 3 brothers, a sister, my niece, and 2 of my children (who are half-siblings) ...
Kdaline's user avatar
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2 votes
1 answer
180 views

Are Y-DNA matches less accurate in a common haplogroup?

My maternal cousin recently took a Y-DNA test to help with research on my mother's family line. The results are back and he is in haplogroup R-M269. He has 347 matches at 37 markers. I took a test ...
Harry V.'s user avatar
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2 votes
1 answer
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DNA origins on Ancestry

About 6 months ago I had my DNA tested through Ancestry and am currently building my family tree. In my DNA origins it is showing, on my paternal side, that my ancestors 100% originated in East Mayo ...
Elaine's user avatar
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1 answer
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Overwhelming AncestryDNA match pointing to an "impossible" link?

Here's the situation: I have strong documentation going back to a Fanny Bergey, born 11 April 1794. (Maybe 13 April.) And, I have 41 DNA matches through that ancestor but no direct evidence of which ...
mattdm's user avatar
  • 241
0 votes
1 answer
109 views

Half sister has half sister or cousin

My half sister (Maternal) share 1673cM across 50 segments. Cousin #1 to me shares 994cM across 40 segments. Cousin #1 shares 1056cM across 46 segments. Her maybe father is my mothers brother. All of ...
Tfinci's user avatar
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1 vote
1 answer
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DNA result suggests my nephew is my great-nephew

I had my DNA tested several years ago and was pleased with the results. Recently I saw where my sister's son (my nephew) had apparently had his DNA tested by the same company. While his DNA was ...
Janice Strange's user avatar
1 vote
1 answer
41 views

Sharing DNA record between two ancestry accounts

My DNA record is in my Australian account and I have activated a UK ancestry account, how do I get the UK account to recognise the DNA record in my Australian account. The reason I did this is because ...
John Sneddon's user avatar
1 vote
1 answer
59 views

Stumped with a DNA connection

I have many DNA connections on Ancestry, I come from the Mormon genealogy on my maternal side, one great great uncle had 2 wives and 27 children! (Taylor line) Of all my connections on Ancestry I'm ...
KrisL69's user avatar
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2 votes
2 answers
89 views

Investigating NPE in mid-1700s Virginia

After taking Y-37 DNA test at FamilyTreeDNA, I discovered that I matched 37 of 37 markers to descendants of William Adkins, b. 1689 VA. I have a paper trail back to George Webb, b. 1794, VA. I'm ...
Rick's user avatar
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1 vote
1 answer
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Understanding ancestry composition results from 23 and Me

I recently did 23 and Me. I was primarily curious about my father's side. He passed away when I was young and his side of the family didn't keep great records in terms of where their ancestors came ...
Rosie's user avatar
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1 vote
1 answer
144 views

Understanding cM and DNA

I'm a female and I have had a DNA test through Ancestry, and so has my niece (my brother's child). I have serious questions as I don't really understand how DNA is divided other than decreasing or ...
charlie's girl's user avatar
0 votes
0 answers
51 views

Nearly identical ethnicity inheritance?

I did the testing through Ancestry, and according to the Ethnicity Inheritance graph (the donut), my parents have nearly identical proportions of Scottish (30% 27%), Irish (10% and 9%), and England/...
penguin97's user avatar
1 vote
0 answers
232 views

Can paternal half sisters share only 16% dna?

My mom was adopted and knew nothing about her biological dad. We know her biological mother and her family. I'm looking for her bio dad. We both tested on Ancestry. I tested first, and I did the ...
Anna's user avatar
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0 votes
2 answers
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Is it common for northeast Germans to have Scandinavian ancestry?

From Ancestry.com DNA testing, I have 11% Swedish/Danish ethnicity, but no Scandinavians in my tree. My tree is pretty good back 5 generations. My German ancestors immigrated to the USA about 1850. ...
Mattman944's user avatar
0 votes
1 answer
110 views

Conflicting information about my husband's maternal grandmother's ancestry/DNA

We have had a ton of research done on my husband's maternal grandmother, Emma Louise Radunz Frank. She was born in Menominee, Michigan on May 24, 1894. The research done all shows that she was ...
marilyn91's user avatar
0 votes
1 answer
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Distinguishing niece from sister using shared percentage DNA [duplicate]

On Ancestry who I thought was my niece my oldest sisters child shared 49% -56% dna how is that possible ? I also have a first cousin who shares 26% yet his sister only shares 6% why is that
Lynell Royston's user avatar
1 vote
0 answers
43 views

Calculating Genetic Distance

Is the Genetic Distance between two Y-DNA STR test results simply the number of str values that do not match? For example, if two people have the exact same values for all STR values except DYS413, ...
Baz's user avatar
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1 vote
2 answers
165 views

Autosomal DNA match anomaly or false positive?

I've done autosomal DNA tests on ftdna for myself, my mother and paternal grandmother. I've transferred the results to MyHeritage, where I have a match with a person X with the largest segment of 27cM....
CuriousM's user avatar
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0 answers
42 views

What is the term for number of descendants, weighted by genetic relatedness?

There are terms for 1) number of children 2) number of grandchildren - but for longer timescales, where you would like to talk about the total genetic contribution still surviving, what terms are ...
fastmultiplication's user avatar
1 vote
1 answer
87 views

Distinguishing aunt from half sister using X and autosomal DNA [duplicate]

My dad died 4 years ago. But my grandfather (his dad) could be my bio dad. We have made a test with my aunt (his full sister) and we share 25,27% dna (1860,2cM 43 segments max136,2cM) With Geneanet we ...
Cla's user avatar
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0 votes
1 answer
58 views

Which DNA test(s) is(/are) currently suitable for East Asians?

I think and believe that I am an East Asian . I've browsed to find out which DNA test(s) is(/are) suitable for East Asians but I have not found one yet. Can you help me?
electrical apprentice's user avatar
1 vote
1 answer
4k views

Assessing likelihood of incest using AncestryDNA results

My mother was raped by her father sometime in her adolescence. There was a trial and he was acquitted, but it is generally known and accepted in our family that the rape did occur. I don’t know if the ...
user14001's user avatar
1 vote
0 answers
98 views

Using DNA to find biological father

I have done both 23 & me and Ancestry trying to gets leads on who in the world my birth father could be. My mom truly can’t recall. I found a first cousin or potential great aunt I think. She ...
The Mindful Raven's user avatar
0 votes
0 answers
69 views

Is 64.2% / 4776 cM full sibling an outlier?

According to 23andme, my younger brother and I (male) matched 64.2% with 4776 cM. That seemed weird since our matches with our parents are the normal ~50% or just under. This is very much not my field,...
Trev's user avatar
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0 votes
1 answer
54 views

Understanding DNA match of 2,559cM to grandparent

I received my DNA results from Ancestry. My first DNA match ended up being my paternal grandpa. We shared 37 percent of our DNA and 2559cm. If that seems high, what could be causing so strong of a ...
Amanda Senn's user avatar
3 votes
0 answers
69 views

Deciding between two competing theories - who am I anyway?

My great(5)-grandfather Daniel Cooper arrived in the US around 1695 (maybe he was born here, maybe born at sea), and while his descendants are relatively well documented, nothing is known for sure ...
Betty Crokker's user avatar
0 votes
1 answer
169 views

DNA matches half uncle

I was wondering if anyone could answer this question I have. I have DNA match with my half uncle ( fathers side) , and I also have a half great Aunty - mother’s side. My sister has a slightly higher ...
Cam 's user avatar
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1 vote
0 answers
38 views

Would half siblings share the same DNA links to extended family

I've matched with either a half sibling\aunt or niece on MyHeritage - we chatted and it seems like we share the same father. However, I have links to a 1st cousin once removed or second cousin, for ...
Sasha Duguid's user avatar
1 vote
1 answer
99 views

3rd Cousin DNA with a person

I share a DNA match with a male person of 152cM coming up as a 3rd cousin. I also share a match with his half brother but much Lower at 45cM. These two share the same father but different mothers. I’...
Cam 's user avatar
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1 vote
0 answers
54 views

What is the relationship based on shared DNA

We are trying to find out information regarding my mothers biological father side of the family. My mom was adopted in 1945 and later in life discovered her biological mother but not her biological ...
Adrian Mahon's user avatar
1 vote
1 answer
329 views

Distinguishing half siblings from first cousins (possible fathers are brothers) using shared cM

Regarding half siblings, sent my DNA to Ancestry came to a match of half sibling at 1530 cMs @ 99% half sibling however was in contact with such match and he is claiming my father or one his two ...
Tony  Lombardo's user avatar
0 votes
2 answers
145 views

Understanding DNA match of 1,723 cM

I have a DNA match of 1,723 cM with a male 6 years younger than me. His father is one of a twin, could my match be not my half-sibling but my 1st cousin.
Lorraine Wingate's user avatar
4 votes
2 answers
7k views

Sharing 52% DNA with mother

I received my 23 and me results and it says I share 52% DNA with my mom. Is this possible?
Anónimo's user avatar
1 vote
0 answers
54 views

ALL 23andme matches link via one grandparent?

I have spent hours today looking at my 23andme DNA matches, and while I have not checked every single one, it seems to me that ALL of them descend from ancestors of my paternal grandmother. I am 100% ...
Victoria T's user avatar
0 votes
1 answer
75 views

2 unknown grand fathers

I have known for a long time that my fathers father is unknown. Unfortunately, I have learned that my mothers father is unknown also. I have recently received my DNA results but the nearest match is ...
Staylor70 's user avatar
2 votes
2 answers
251 views

Shared DNA when MRCAs are Cousins

On average, 2nd cousins are expected to share about 1/16 of their DNA. If parent-child share 3600 cM, then the 2nd cousins would share on average 1/16 of that or 225 cM. The 2nd cousins share a set of ...
lkessler's user avatar
  • 16.7k
0 votes
1 answer
88 views

Does DNA match of 1,781 cM suggest half siblings? [duplicate]

I have been contacted by someone who says we are half sisters due to our DNA match. Our DNA is 1,781 which apparently is a high match. Would this make us half sisters? I am an only child and she is ...
Mary Ann Arkinstall's user avatar
3 votes
1 answer
328 views

Why does 23andMe say there's "not enough information" on a few of my chromosomes?

I've been looking at the chromosome painter and my matches in 23andMe, and realised I have a few chunks of DNA that are greyed out and read "not enough information", and therefore don't ...
Charlie's user avatar
  • 1,659
2 votes
1 answer
2k views

DNA implications if my Gr Grandfather is also my Dad's father? (incest)

I am trying to find my family of origin. My dad died several almost 15 years ago before DNA was a common thing. He was adopted and never knew anything about his birth parents and he never wanted to ...
Andra K's user avatar
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0 votes
1 answer
96 views

331 cm Uncle - could it be different relative

On 23&me the DNA results came in yesterday and it exactly states "You & John share the DNA that was passed down from two of your grandparents (his parents)". We have 331cm in common ...
DEBBIE's user avatar
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1 vote
2 answers
509 views

Identifying paternal grandfather using DNA tests if birth name is unknown

My paternal grandfather was raised by others and took their name, but he was not officially adopted. I have no idea of his real name. Can I still find him/family with DNA test(s) and, if so, which ...
Linda's user avatar
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3 votes
3 answers
285 views

How can two different generations of one family be a half sibling to an outsider?

My full paternal uncle and I enough cM with an outsider to both be listed as half siblings to an unknown male. My uncle shares more cM with that unknown male than I do (a female). Both my uncle and I ...
MOMMAMIA9's user avatar

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