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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1answer
81 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
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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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32 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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116 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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2answers
122 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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3answers
164 views

Determining if 1,814cM match from AncestryDNA is Half Sibling?

My son recently had a match come up as close family the match is male and 1814cm. His only living grandfather is already in our tree at 1857cm. All other grandparents are deceased and have never ...
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1answer
249 views

How can 3/4 siblings share mother but not paternal ancestry?

My family is running the DNA test gauntlet and my dad got back some interesting results. He is related to his half sister (1,687 cM across 66 segments) at a level that is to be expected. He is ...
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1answer
43 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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52 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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97 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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1answer
57 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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4k views

Half siblings using cMs (centimorgans)

I used ancestry to obtain my results. I found my 1st cousins and aunt on my father's side. The process of elimination resulted that this one young lady has to be my sister but she came up my 1st ...
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2answers
201 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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3answers
117 views

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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55 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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1answer
131 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
137 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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1answer
131 views

Visualising genetic distance information from personal genetics sites

I've been using 23andme.com it shows me a comparison with genetic relatives and lists our common relatives. I have over 1000 3rd, 4th and distant cousins on 23andme. Is there are way to make a ...
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1answer
136 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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1answer
86 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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4answers
7k views

Could a first/second cousin DNA match actually be my half brother?

I was adopted at birth and know very little identifying information about my birth parents. I recently took a DNA test on Ancestry.com and found a match that was a possible 1st/2nd cousin match. ...
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52 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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6answers
40k views

Is a half-sibling match on AncestryDNA reliable, or is more testing needed?

I'm new at the DNA testing but here are my results. After receiving my DNA results in January 2016 my first match was with a known cousin who is also on Ancestry with a score of 959 centimorgans at 41 ...
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1answer
106 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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3answers
219 views

Is autosomal DNA match of 2,277 cM a full sibling?

My sister and I share 2,277 centimorgans. It seems low for full sibling but high for half sibling. Any thoughts?
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439 views

Are 1,053 shared cM 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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2answers
117 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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2answers
89 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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3answers
1k views

Can my DNA results be wrong?

I am a female, who was adopted at birth. I had been searching for my birthmother and found her through a 2nd cousin match on Ancestry, but she passed away in 2010. I was able to locate her brother,...
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3answers
4k views

What explains sharing a 28.6 cM DNA segment with a sixth cousin?

According to GEDmatch.com I have a sixth cousin that matches my autosomal DNA on chromosome 6 in a segment that is 28.6197 cM from 16,806,001 to 42,035,791. This only overlaps with my first cousin ...
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5answers
31k views

Finding haplogroup through raw DNA data?

I just got my results from AncestryDNA. What are some ways to find my haplogroup through my raw DNA data?
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2answers
161 views

Does 1,864 centimorgans indicate half-siblings? [duplicate]

My sister, daughter and I all took DNA tests for fun. My sister and I show up on Ancestry as "close family," and share 1864 Centimorgans, and we do not share any relatives that my daughter and I share ...
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1answer
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
185 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
295 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
1k views

What would the starting shared cM number be for abnormally close relationships in Autosomal DNA test?

I have seen in the examination of family trees where individuals sharing a great grand parent marry and have children, somewhat commonly in pre-American Civil War, which I would think would create ...
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1answer
72 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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2answers
476 views

My Full DNA: Whole Genome Sequencing with mtDNA from dante labs

I have done 23andme. And I see there is a 23andme tag and an Ancestry.com tag. I have just come across an ad from Dante Labs for "My Full DNA: Whole Genome Sequencing with mtDNA." While I have a PhD ...
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0answers
135 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
66 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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0answers
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
79 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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2k 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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1answer
92 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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1answer
69 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
67 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
105 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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3answers
3k views

Where can I find a centiMorgans calculator?

When doing triangulation, I can end up with a segment shared among 3 in a GEDmatch compare where I have the cM for each pair of the three, but not the cM for the overlapping portion of the segment. I ...
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2answers
110 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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2answers
103 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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