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For questions about autosomal DNA testing for genealogical purposes. Autosomal DNA is the majority of the DNA in our chromosomes, and is passed by both mother and father to child. This includes tests provided by AncestryDNA, 23andMe, and FamilyTreeDNA's FamilyFinder.

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Half Sibling Mystery

I have somewhat recently started using Ancestry.com, so just a fair warning that I'm still learning how everything works! That being said, I am the child of my biological mother, who I know, and an ...
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1answer
20 views

Relationship to DNA match who may share my mother with my great-uncle

I know this will sound far-fetched, but maybe someone can help me. DNA Match through Ancestry shows: 'First Cousin' match at 820 CM over 37 segments (Let's call him Tom) 'Second Cousin' match at 541 ...
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2answers
40 views

Is this close family member on AncestryDNA a half sibling?

on ancestry.com i got a "close family" match, with 1,430 centimorgans shared across 58 DNA segments - it says it could be a niece, aunt, or half sibling (range includes 1st cousin, but i have read ...
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2answers
23 views

Estimating centimorgans of shared autosomal DNA between female and half paternal brother?

I am a female. My half paternal brother and I share 328.7 centimorgans across 13 dna segments. Is that possible, or should the numbers be higher?
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1answer
40 views

Sharing more autosomal DNA with second cousin's child than with second cousin?

In my shared matches on AncestryDNA I am used to seeing matches to the children of my 2nd cousins that are less than the match I am to their parents. However, when examining my sister's DNA I see ...
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2answers
61 views

Is this DNA match likely to be a cousin or a half sibling?

I found a 1st cousin not connected to my mom and my dad was an only child. She has 1053 cM on 40 DNA segments. I have heard people say 1st cousins can also be half-siblings? If she is a first ...
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1answer
80 views

Can half-siblings show different relationships to extended family?

My husband has found a half sibling, first on Ancestry showing a match of 1542 cm over 77 segments, and then confirmed on 23andme with a suggested relationship of "half sibling". Ancestry only showed "...
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2answers
62 views

Different genetic relation strength through maternal vs paternal line?

Is there a different genetic relation strength through maternal vs paternal line? In other words: am I more related to my mother than to my father or are they exactly equal? Or another way to ask it ...
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2answers
49 views

Distinguishing relationships based on DNA numbers and age difference?

I recently joined Ancestry and received several first to second cousin matches, all from what appears to be the same family. The strongest match is 1070 centimorgams and 45 segments. This woman is ...
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1answer
61 views

Understanding DNA results?

We are searching for my husband's father with nothing more than a name. We did DNA through Ancestry and the person we thought would be his half-sister Cindy came back as his first cousin 1,187 ...
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1answer
74 views

Explaining major discrepancy in genomic position between Gedmatch and MyHeritage?

I have identified a discrepancy with several test kits that were tested at Ancestry, with results transferred to both Gedmatch and MyHeritage, all relating to the same area at the end of chromosome 19....
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2answers
67 views

Using shared cM to determine likelihood of misattributed paternity?

My ancestor Harriet Smith was born in the mid-1850s in England. Her birth certificate shows both of her parents (John Smith and Sarah Johnson). For the purposes of the birth registration, John and ...
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1answer
73 views

Seeking site to compare Autosomal DNA results from National Geographic and Ancestry?

My elder sister and brother had their DNA done with the 1st Genographic kit from National Geographic. Sadly, they both just recently passed away within 6 months of each other. My sister deceased:July ...
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1answer
22 views

Tracing African relative based on autosomal DNA results?

I DNA tested my 3 children and one son shows as 1% Benin/Togo, my ex-father in law has also tested and he shows having SE Bantu. I am guessing 1% means about 10 generations back? Between my ex-in laws ...
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1answer
58 views

Determining 2nd or 3rd cousin relationship

I had a DNA test done with Family Tree DNA while searching for my birth parents. I have identified 2 half-sisters on my birth father's side and several cousins on my birth mother's side. The closest ...
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1answer
56 views

Needing further testing to determine half-sib status?

Another AncestryDNA user and I share 1,792 centimorgans across 49 DNA segments. The back story is that I'm a sperm donor baby and this user's father was a donor at the same clinic in the same time ...
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0answers
40 views

Pacific Islander connection to North American Natives

Is there a possible connection between Pacific Islander and Native American DNA? All of my ancestors were in N. America before 1800, but Pacific Islander shows up as "low confidence region" on ...
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0answers
15 views

Finding father with AncestryDNA? [duplicate]

I recently tested with AncestryDNA to help find my father. I have no clue what his name is or any other information. I got the results back of potential 2nd cousins. How can I find who my father is ...
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2answers
86 views

Can group of matches on same segment with cM value in mid 20s be out-of-range?

WARNING: This is a question that involves endogamous genetic genealogy. (Not applicable to "normal" or "standard" DNA evaluation). I am still struggling to find some statistical limits/boundaries for ...
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1answer
74 views

Half brother and sister related to other family?

After taking an AncestryDNA test, I matched a half brother, who I'll refer to as Y to preserve privacy, and sister, who I'll refer to as X. Both appear to come from the maternal side (both adopted ...
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1answer
87 views

Helping my son find his unknown biological father

My son's biological father and his family is unknown. Both my son and I took Ancestry DNA tests. Then I went through his matches for "shared matches" - if I didn't show up, I assumed the match was ...
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0answers
111 views

Is the relationship an aunt /niece or half sister to my mother?

I am a genetics beginner: A little back story: My mother was adopted at birth. She found her birth mother and siblings back in the 90s. The birth mother was deceased at the time, and we also ...
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3answers
132 views

Trying to find father using AncestryDNA?

I'm trying to help my friend find out who her biological father is. She currently has no clue. Our starting point is that she has taken an Ancestry DNA test and so has access to some 2nd and 3rd ...
4
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1answer
90 views

Filtering for Triangulated matches in MyHeritage?

It's a real pain to try and find the triangulated matches that I share with another DNA donor. I might have to click on "show more DNA match" ten times before I see one triangulated match. Is there ...
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1answer
79 views

Why are MyHeritage atDNA SNPs higher than other test sites?

I have accumulated DNA segment match information from ftDNA, GEDmatch, and MyHeritage. It is just recently that I've added MyHeritage DNA donors data, and I've found that the total number of matching ...
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2answers
114 views

Determining shared maternal or paternal lineage via shared DNA segments?

If DNA cousins and I share the exact same segment of DNA, does it always mean we're related via the same side of the family? Background: I have taken DNA tests with National Geographic, Ancestry, ...
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4answers
201 views

How to narrow down the best DNA donors in a large family?

I've been doing genealogy for quite a while, but am new to DNA, having purchased six tests for Christmas. Not all results are in yet, but I have a few good matches. I'd like to get four more kits in ...
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3answers
180 views

Can half sibling category actually be full sibling?

I was adopted and used AncestryDNA to help in my search. Recently, I received an alert that a had a match to a "Close Family". People in that category include Aunts, 1/2 siblings. Is there ...
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1answer
70 views

Explaining unshared DNA segments with full sibling?

Recently, a full-sibling had her DNA tested on ftDNA. It was exciting to compare our DNA. But there are a number of things that I found confusing. One was that when I viewed and compared our DNA ...
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0answers
32 views

Missing expected Norwegian ethnicity in Family Tree atDNA results?

I just received my Family Tree atDNA results which show 97% British Isles. This seems to be a major error because it shows my Dad's lineage (BI) but completely leaves out my mother’s lineage which is ...
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1answer
121 views

Why no DNA match with possible seventh cousin?

Working on my geneology family tree I discovered my 6th generation grandfather link with another person. I had a DNA test and no match came back with the other person who also had DNA test and I have ...
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2answers
207 views

Match on Autosomal DNA but no match on X chromosome

I am very new to genealogy and I am hoping someone can advise me. Having uploaded my gedcom to Gedmatch, my best one-one match on Gedmatch is with someone who matches on Chr 8 (14.4 cM) and Chr 11 (30....
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2answers
159 views

Adopted and making sense of my DNA matches: which are paternal vs maternal?

I am adopted. I know who my birth mother was and that she came from France. I was conceived in a Brothel in a small town that ironically, my adoptive parents lived only miles from, and that I raised ...
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2answers
172 views

53 Segments of DNA

I share 53 segments of DNA with a relative. I’m currently not sure of my exact relationship with them however, but Ancestry.com shows us as cousins with confidence being extremely high. This person is ...
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1answer
597 views

Shared centimorgans of second cousins with different paternal grandfathers?

I'm new. Just reading the useful answer to a question about shared centimorgans of first cousins with different paternal grandmothers. I share 238 cM with a second cousin. We can be pretty sure that ...
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4answers
539 views

Acceptable number of no-calls in autosomal DNA test results?

Using Gedmatch's file diagnostics, an autosomal DNA test kit I manage shows that there are 31200 (4.4%) no-calls. In most matching algorithms, a no-call is treated equivalently to a match. Therefore, ...
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2answers
431 views

Determining if 2nd cousin is father from DNA test?

My partner is waiting on her DNA results. She strongly suspects that her 2nd cousin is her father (long story). Will the DNA results reveal the possibility from more concentrated markers, or less ...
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1answer
124 views

Autosomal DNA: Can I tell who is the parent and who is the child?

I have two people who have both autosomal DNA tested. I have both of their match lists which contain all the people each of them matches to. For each person that each of them match to, I have: The ...
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1answer
139 views

Is DNA match between two parties that ought not be related by “blood” possible?

I recently completed a autosomal DNA through ancestry. They reported that I had a possible match to another ancestry user with: 30.0 centimorgans shared across 1 DNA segment However, it turns out ...
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3answers
1k views

Does DNA testing show both maternal and paternal ancestry?

Would my sister and I get the same results being I am a brother. Same parents for both of us. I wasn't sure how to ask the question. What I am wondering if the results would show the same geographic ...
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1answer
124 views

Matching unknown family member apparent from AncestryDNA?

I had my DNA test done on Ancestry, when I received my results I showed a 1051 CM match to a Sandra. I knew nothing of this person nor could we find any connection. This person lives in Wales. Rumor ...
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1answer
400 views

High match on autosomal DNA, but no X DNA match to mother's half sister

The son of my wife's half-sister recently uploaded his DNA (from Ancestry) to GEDmatch where my wife's DNA (from 23andme) is already recorded. There was a high (846cm) autosomal match, but ZERO match ...
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1answer
967 views

Distinguishing half sibling from niece/nephew using AncestryDNA?

I did the ancestry DNA test and also uploaded my raw data to GEDmatch. I have located two close family matches and I'm wondering how to find out how close we are. Either half siblings or niece/nephew. ...
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2answers
176 views

Next steps once DNA match is found

I've recently made contact with a DNA match I found on myheritage.com. The match is shown as: Estimated relationships: 1st cousin twice removed - 3rd cousin once removed DNA Match quality: 1.3% (93....
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1answer
379 views

What does 'DD' mean in a name on GEDmatch.com?

On GEDmatch.com I've seen numerous matches that include a DD prefix on a name like: DD Mary Brown What is this convention and what does DD stand for?
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1answer
92 views

Using AncestryDNA to verify biological father? [duplicate]

I believe I have finally found my biological father. I was recently contacted by a possible cousin. Amount of Shared DNA in Ancestry is 548 centimorgans shared across 31 DNA segments. In GEDMATCH ...
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1answer
281 views

How can I determine the likely relationship based upon autosomal DNA shared cM?

Given two tests that share some cM of autosomal DNA, how can I easily find the predicted relationships that such shared cM would suggest? E.g., a 2,200 cM match suggests it could be either: ...
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0answers
69 views

Looking for 3rd cousins among 4th cousin matches

So I was wondering if its possible in any way to get a hint if someone showing as a 4th cousin match could be a 3rd cousin? From my understanding you can't, but I want to ask if anyone has done this ...
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1answer
179 views

Understanding matching for Shared Ancestor Hints in AncestryDNA?

This may be related to Why might number of Shared Ancestor Hints go down on AncestryDNA? but I think it is a more specific question, and so, at least for now, I do not think that it should be ...
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1answer
325 views

Centimorgans and relationship

If two people share 327 centimorgans and 19 DNA segments and are first cousins 1x removed, is it possible that one of them is my 2nd cousin 1x removed if we share 353 centimorgans and 17 DNA segments. ...