Questions tagged [autosomal-dna]

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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17 views

Clustering of DNA regions at the grand-parents level

My father is born of unknown father and did a 23 and me DNA autosomal test. I thought I could use this test to potentially identify some relatives on this side but only very distant ones (at best 3rd ...
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44 views

Full sibling vs half sibling

Initially one of my full siblings and I received dna results from ancestry.com. which showed that our shared dna is 1752cm, and we were matched under close family - 1st cousin. I was a little ...
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23andme shows a man as my dad's cousin, but ancestry.com shows him as my dad's brother

I did 23andme, and so did our mystery man. Two of my grandfather's brothers also did 23andme, as well as a number of the kids and grandkids of my grandfather's brothers and sisters (my grandfather ...
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48 views

DNA half-sibling

My brother did an Ancestry DNA test last year and last week got notification of a new close relative match. The man matches at 1695cM which indicates grandparent/grandchild/uncle/nephew/half-sibling. ...
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35 views

What is the cut off for a half-sibling and first cousin in CM's?

I am adopted and was searching for my birth family and found a cousin and since then I had someone in the family helping me with the search. I found someone who I think is my half-sibling. She did a ...
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76 views

Trying to narrow down biological grandfather

I have been working on finding my biological grandfather. The closest DNA match I have to my father (who has taken a test) is 1015cM. I've narrowed down his father to either her father or her uncle. ...
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1answer
51 views

What would the cM range be for persons sharing the same mother and the fathers are brothers?

I had a swab test performed to establish sibling-ship through DNA Diagnostic Center (DDC) wanting to confirm what I thought was certain paternity with myself, male sibling and and mother (father ...
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59 views

Can 2,025 cM shared indicate full Siblings?

My brother and I did ancestry tests at different times. We had 2,025cM over 39 segments. Longest one was 158. As I looked at our matches all I could see was my moms side of the family. It was saying ...
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65 views

Mapping DNA relationships on paper

I have recently started digging into my DNA matches. I have several closely related matches. I was born in Montana and my grandma was married to a man who has no biological relationship to me. However ...
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158 views

Determining if half brother was product of incest

I have worked on my tree through Ancestry.com for many years to include furnishing my DNA. My brother's daughter started a tree through Ancestry and gave her DNA also; the results shows her as my half ...
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108 views

Understanding daughter's 314 centimorgans with half nephew

My daughter just learned she shared 314 centimorgans with a boy we believed was her half brothers son. I have just sent in my sample as the supposed father of her 50 year old half brother. We are all ...
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Is there anything wrong with using small DNA segment matches as evidence?

Many people find relationships with other people that they only share a small amount of DNA with, e.g., 10 cM or less. They then, after researching the other person's tree, find a common ancestor and ...
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223 views

AncestryDNA is changing again? What's going on? (July 2020 edition)

AncestryDNA is changing the way they match users, and which matches will be shown to you. Matches that share 6 to 7.9 cM will be eliminated. In addition, since AncestryDNA rounds up segments from 7.5 ...
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57 views

Can niece not connect to my paternal line but her daughter connects to my maternal and paternal side?

My niece is a dna match 2112 cM over 80 segments. She only matches on my maternal side of the family. Her daughter is a dna match of 1118 cM over 46 segments. She matches both my maternal and paternal ...
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92 views

Half brother Or someone else?

I was given an AncestryDNA test as a Christmas gift and I took the test. I was matched with several people that I didn’t know but I assumed they were people on my dad’s side who I knew absolutely ...
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54 views

My close family dna match

On ancestry.com my first to second cousin match is my supposed first cousin but him and I share 841 CM across 46 segments is he my cousin or my half nephew and do I possibly have a half sibling?
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91 views

Explaining older sister sharing 1,961 cM as close family or 1st cousin

My older sister came back "close family-first cousin". What does this mean? Shared DNA 1961 cM across 74 segments
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115 views

Matching less than 6cM on Ancestry but almost 15cM at GEDmatch

I am communicating with someone who appears to be a 5th cousin once removed. According to AncestryDNA my cousin shares 10cM across 1 segment with my paternal uncle, but is not a match to me (at least ...
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58 views

Can 1,782 cM shared indicate Half Siblings? [duplicate]

Could a person with 1,782 cM actually be my half-sibling? This person is listed as close family to me, yet I do not know them. My cM is the same as this person's. I do have 6 paternal half ...
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2answers
281 views

How can a 3rd Cousin be a DNA match to my mother AND my father’s side?

On Ancestry I have a match at the 3rd cousin level and we have common matches with both my mother and fathers side. New to this and that is confusing to me. Sorry if I am missing something obvious!
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1answer
356 views

Child of possible incest

My sisters, two aunts and several cousins (on maternal side) did the 23 and me DNA test. One of my aunts (the younger one) showed up as a half sister to me (we share 1,942 cM and 44 segments) and my ...
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1answer
168 views

Understanding 1,537cM match to person and 1,950cM match to their uncle

I have a match with a female that is a few years younger than me (she is in the 60s). She and I match at 1,537 cM across 47 segments. Her Uncle (Paternal Uncle, as far as I know) is a match with me ...
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76 views

Adopted 1st cousin match possible secret sibling?

An unknown woman matches: me with 1045cM my aunt (my father's sister #1) with 1952cM one of my 1st cousins (from my father's sister #2) with 998cM. My father has one other sibling: a brother who has ...
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132 views

Can a DNA match of 1967cM across 72 segments be a first cousin?

My husband had DNA testing through Ancestry. A woman of about the same age shares 973 cM across 45 segments. We determined that she was probably a first cousin; a child of my husband’s paternal ...
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153 views

How to completely upload an “Everything” kit created from Dante Labs to GEDmatch?

I have Dante Labs WGS kit for which, using WGS Extract, I created an everything kit for GEDmatch. When I uploaded it as other since Dante Labs is not an option, it was identified as being "23andMe ...
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1answer
69 views

X-DNA and Half Sister

I am a female. Another female and I have come up as sharing 1915 cM's and when we do the one to one X-DNA on GED Match, if we click on "prevent hard breaks", we have a straight blue line across the ...
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46 views

Have I found both biological parents, one biological parent or should I keep looking?

My husband's mother was adopted without any records (1910 NYC). I located her biological paternal family along with several possible brothers through DNA. I cannot locate her biological maternal ...
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2answers
96 views

Understanding shared DNA of 1,576 cM with great nephew

I had my DNA tested through Ancestry. About a year ago, my great nephew (I'll call him GN-1) whom I raised had his tested. The match came up Close Family–1st Cousin Shared DNA: 1,576 cM across 69 ...
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1answer
79 views

Might 3.46% American Native DNA come from 10 generations back?

If DNA shows 3.46% American Native, then how far back in generations did it come from? I am told it was from a 10 generations back.
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1answer
78 views

Does 439 cM shared suggest half uncle rather than half first cousin?

I am trying to determine if my half sister had a different father than the one she grew up with. I was given a name of who the father could be. He has passed away but his son took a DNA test on ...
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1answer
136 views

False-Positives in Autosomal DNA Matches

I have spent a significant amount of time and effort beating my head on brickwalls that appear when tracking Ancestry Autosomal DNA matches. I've had success in establishing document trails with ...
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2answers
105 views

Intrepretation of DNA detectable relationships

While quite a number of questions have been asked and answered regarding DNA and relationships, I'm not certain that this question has been asked. I have a 5th cousin that has been identified by ...
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1answer
113 views

Unlinking Tree & DNA on Ancestry

I have my Ancestry DNA results linked to my Tree. If I choose to unlink, link to a different person or different tree will I lose any of my notes, groups etc? I assume not, but thought it best to ...
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2answers
111 views

Interpreting ethnicity from DNA testing

Ancestry DNA testing confirmed that I am 23% Chinese. My mother has no Chinese DNA. My fathers mother has no Chinese DNA. Does that mean my father is 50% Chinese and his father is 100% Chinese? ...
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1answer
90 views

Does 866 cM shared suggest half aunt rather than aunt?

There is a joke in my family that my father's father is not his biological father. He only has sisters and his father is dead, so there's no possibility of a true test. But I'm his daughter and I did ...
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1answer
107 views

Evaluating half sibling using AncestryDNA?

Recently we (two full sisters and a full brother) think we may have found a half brother who is 50 years old on Ancestry DNA, where he is being categorized as Close Family-First Cousin. sister 52yr ...
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2answers
134 views

Could DNA matches of 1,591 and 1,773 cM be half siblings of person tested?

I recently received my DNA matches from Ancestry, and I share 1,591 centimorgans across 53 segments with one, and 1,773 centimorgans across 58 segments with another. Could these people be half ...
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1answer
72 views

Aunt or Half Sibling?

We tested a potential Aunt for my husband and the results came back 1992 Cm. We know this falls into the range we expected however, I immediately realized she has matches that she doesn't share with ...
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1answer
91 views

DNA/Half-Sibling or First Cousin, Based on Fairly High Shared cMs

Brand new at this and don't have good grip yet on cMs ranges for relationships, especially when number falls in between stated ranges for relationships. Both my dad and I have taken DNA tests from 23 ...
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1answer
43 views

Understanding first cousin and grandson/grandfather relationships at 23andMe

I have 2 first cousin matches on 23andme.. both named ‘John’. Their relationship is listed as grandson/grandfather. With that age difference and relationship they both cannot be my cousin. I’m adopted ...
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3answers
126 views

Half Siblings and DNA Matching

My sister and I are half-siblings. We have always know this and my mother reportedly had an affair during WW2. This was confirmed with ancestry DNA as we only share 1603cM. I'm trying to filter out ...
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1answer
67 views

2nd cousins. One 4%, one 8%?

I’ve recently been matched to two second cousins by DNA. However one shows a 4% match and the other one shows an 8% match. One is on my father’s side and one is on my mother’s side. Why, or how is ...
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2answers
200 views

Finding maternal grandfather using AncestryDNA and GEDmatch

I have my DNA and my mom's DNA on Ancestry and Gedmatch. My mom was adopted. I got her original birth certificate from Kansas and found her birth mom's family (birth mom was deceased) but the man ...
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1answer
58 views

Analysing relationships using autosomal DNA

I (A) am 1095 cm's from a known cousin (M). I (A) am 1224 cm's from an unknown person (S) My cousin (M) is 1458 cm's from the unknown person (S). I (A) am described as a Cousin to (S) (M) is ...
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1answer
194 views

How could I be 10% French when there's no French in my mother or father's DNA results?

Ancestry DNA says I'm 10% French. My father never got tested, but my half sister and cousin on my father's side (who were both identified by the site) both tested as 100% European Jewish. My ...
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1answer
138 views

Understanding shared match of 1,177 cM?

I recently received a "DNA Match" on my account to some one who shows 1,177 cM shared. I am trying to understand what this is really telling me. This is important to me as I do not know who my ...
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1answer
130 views

Understanding 1,102 shared centimorgans?

I took an AncestryDNA test and have matched with a new relative JP. She and I share 1836cM. She’s not my half sister. She’s not my grandparent. She could be my father’s half sister. With this amount ...
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1answer
157 views

Does age factor in when calculating relationship on DNA match

A result of 193 cm from 100 year old, matched up to a 35 yo. Does the age of the participants factor in? The sample also showed cross match. The relationship is estimated at 2nd to 3rd cousins. Does ...
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21 views

Does 1,517 shared cM indicate half-siblings? [duplicate]

My husband has a close family match of 1,517cM across 61 segments and his niece shares 906 cM across 40 segments. Is there a chance this is a half brother to my husband and half uncle to his niece? ...
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1answer
155 views

Can 419 and 468 shared cM indicate first cousins?

I was adopted and have known my birth family for many years. I just did a DNA test and found I have 702 matching cM's with the daughter of my mother's brother (making her my 1st cousin). This helps ...

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