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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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Contacting AncestryDNA match?

I have a match on Ancestry.com with someone who I believe is a nephew who was given up for adoption. I sent 3 messages through Ancestry.com but no response. Do you know of any other way to contact ...
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Stacking DNA and trees?

Is there a software program i can download that i can then input every family members DNA into and also my heritage and ancestry tree into to create a combined one? One that can show me duplicates, ...
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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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Creating a phased DNA kit using grandparents' kits?

I was lucky in that I was able to DNA test both paternal grandparents, as well as my maternal grandmother before she died last year. I have also tested my mother, but unfortunately my other ...
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Combining sibling DNA data for easier research

I have DNA from four of my siblings (they were tested at three different places). I'd like to find a way of easily combining our raw DNA data into two files -- even if the files weren't sorted by our ...
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Understanding half first cousin DNA results when no match?

We have strong reason to believe we know who my aunt's half first cousin is. However, he is not matching her with autosomnal dna test on ancestry. Its fair to say ok forget it but there are so many ...
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Interpreting MyHeritage DNA Match of 973cM?

I just got a DNA match at MyHeritage with 973 cM, in common, which says first cousin. My mother had one brother, and it's from her side of the family. He had a son, who passed at a young age. I am ...
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Possible family relationship with 3rd cousins

I have three 3rd cousins on my mother's side with 66.1-71 cM shared between us. One is male and 2 female. These 3 cousins are 2nd cousins to each other and I believe I am their third cousin. They ...
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Are AncestryDNA matches of 904 to 1,211 cM likely to indicate half siblings?

Grandma is showing dna matches with four “1st cousins” who are all supposedly first cousins themselves. The matches are 1211, 1175, 1138, and 904 cms. There is also a match of 972 who is a brother to ...
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Possible Half Siblings? [duplicate]

Recently I was contacted by a man who feels we could be half siblings. He explained where his father had lived and I learned he and my mom had dated. My CM to his was over 2000 and ancestry.com showed ...
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Distinguishing half siblings from cousins using AncestryDNA?

My husband recently took an AncestryDNA test to see if he could find out who his father was, at least through matches. His closest match that came up was a female who shares 1390 cms across 45 ...
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Half siblings or double cousins?

MB= my brother (1/2 sibling) MC=cousin (our mother's sister's daughter given up for adoption-no longer married to SS) DC=cousin to both of us but either 1/2 sibling to my brother or double cousin) AS= ...
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Is a 12 CM 1 segment match better evidence for a common ancestor if it's otherwise unlikely?

Early in my research, I had guessed that the Samuel Price listed in the 1850 census for Minersville, Schuylkill County, Pennsylvania (my gg-grandfather's brother) was the same person as Samuel Price ...
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Half-Sister/1st Cousin Shared DNA

I'm curious to know what the shared DNA would be between half-sisters who are also first cousins. If the mother of both sisters had an affair with one of the sister's father's brothers what would the ...
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Understanding second cousin match on AncestryDNA?

I am a little confused. I have a match on Ancestry.com...who by the way doesn't answer my emails which is incredibly disappointing as he is the closest match I have ever had and I've been on FTDNA for ...
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How many centimorgans should I share if second cousins marry?

My first cousin's daughter had a child with my sister's son. The child was given up for adoption. I'm matching someone on Ancestry.com with 1124 centimorgans. Not sure if this is the child and cannot ...
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Reducing risk of confirmation bias with DNA test results?

This is a follow-up question to Using DNA to link individuals after a name change My cousins and I are pretty sure my great-great grandfather, Everett T Malcom, changed his name when he moved west. ...
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Identifying half brother using AncestryDNA?

I took the ancestry.com DNA test, and have matched to several 1st cousins. recently I was notified of a match that simply says Close Family member. Our match states we match DNA of 1554cM and 49 ...
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How many Centimorgans would be shared with half niece?

My newly discovered half sister has a child. Around how many centimorgans do you think i should share with her? I am not looking for an exact number. I'm looking for a range.
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How do descendants of twins affect DNA matching?

With respect to AncestryDNA matching. Could a child of an identical twin match a first cousin at a half sibling range? My friend has suspected her grandfather isn't her biological grandfather. DNA is ...
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What relation is my Half-Aunt to her DNA Matches?

I have recently discovered through an Ancestry DNA test + GEDMatch that my Aunt is my half-Aunt and that she and my mother don't share the same biological father. Looking at my Aunt's DNA Matches on ...
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I don't know who my dad is but I have DNA paternal matches

I have DNA matches on Ancestry.com but none high enough to be my father. However, all the matches point to a common name as our ancestor. The highest match is 959 over 42 but the person it matches ...
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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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Not sharing any centimorgans with person who mother shares 102cM?

My mother (age 96) shares 102.1 cM with a man (age 72). However, I do not share any cMs with him. What could their relationship be and why don't I share any cMs with him?
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Does AncestryDNA match of 1,697cM indicate half sibling or aunt?

I just received my AncestryDNA results. It shows I have a close family match with a woman who would be my grandmother, aunt, or half-sibling. We matched 1,697cM with 51 shared segments. It cannot be ...
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Is AncestryDNA match of 1,655 cM a half sibling?

Shared DNA: 1,655 cM across 46 segments. Can someone that shows this as one of my matches on AncestryDNA be a half sibling?
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AncestryDNA showing No Match for Half Aunt?

My father's half sister just posted her AncestryDNA results. I did not come up as a match, nor did my sister. Does this mean that my father's dad is not really his dad, or could there be another ...
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What are the chances of having autosomal DNA from an ancestor N generations back?

I understand that everyone carries autosomal DNA from both their mother and their father. Because there are only a small number of crossovers per chromosome, I see that not everyone would carry any ...
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Is AncestryDNA match of 2,063 cM a half sibling?

I am new to AncestryDNA and my results came back with my top match having 2,063 centimorgans out of 62 segments saying close family. Would this be a half-sibling? The match is a few years older ...
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52 views

Match to a man and his daughter, but not his grandson

My father and I have a DNA match to a cousin but my son does not. How is this possible?
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Deducing relationship from DNA results for two matches at two different websites?

My father was adopted and, while I’ve had my DNA tested, he is not quite ready to do so. I’ve found some fairly close matches, one that shares 9.8% (692.7 cM) and another that shares 14.4% (979 cM). ...
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Understanding close family match from AncestryDNA?

I took the AncestryDNA test. It came back with: Close family male, 2022 cM shared across 60 DNA segments. 1st cousin match female, 1194 cM shared across 48 segments. It turns out the female 1st ...
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DNA match higher with a younger generation of the family

I have a 107 cM match with Eli. His mother is Lily and Lily's brother is Henry. Henry's son is Henry Jr and his grandson is Kevin. I have a 235 cM match with Kevin. Kevin is one generation younger ...
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Brother/sister have fully identical segment — match only matches one of them on that segment

Using David Pike's tool: https://www.math.mun.ca/~dapike/FF23utils/pair-comp.php I found that my mother and her brother are fully identical on the portion of chromosome(s) 4 from position 122.2 ...
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What is family connection for 1722 cM match?

I have a DNA match with a man that AncestryDNA discovered. The match is DNA 1722 cM across 62 DNA segments. I have messaged the guy to try and talk with him and discover how we are related. He seems ...
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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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Can the amount of saliva affect how many centiMorgans are shared between 1st cousins?

I share 279 centimorgans with a 1st cousin in 12 segments. I don't believe that is enough to be considered 1st cousins. She says she couldn't spit a lot. Would a small amount of spit affect the ...
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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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Understanding second cousin predictions from AncestryDNA?

I have three extremely high second cousin predictions from my father's side. I do not know my anything about my biological father (Name, age, etc..). My top matches are: R - 619 cM across 39 ...
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Unknown 1st cousin match who shares matches with both grandparents

I received notice of the following DNA match through Ancestry: 1,193 cM shared across 46 DNA segments, predicted relationship first cousin, extremely high. The next closest match is my nephew (1,...
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Adequacy of DNA evidence — how can I improve it?

Individuals H and J are 2nd cousins (supported by a strong documentation trail) who share two ancestors: John Charles Wright (circa 1830-1904) and Caroline Ellen Brown (circa 1827 – 1871). They share ...
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Distinguishing half-brother from uncle when sharing 2,183 centimorgans?

Results from Ancestry show that I share 2183 centimorgans with a complete stranger who is my age. 1450-2050 centimorgans = grandpa, uncle, half-brother 2400-2800 centimorgans = brother I wonder if ...
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Understanding relationship with Shared DNA of 1,911 cM across 62 segments?

I had a person contact me via Ancestry.com and we appear to be very close in ancestral background. She is 10 years my senior and appears that she could be a very close match with the following shared ...
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Is this Match a Half Niece or a Second Cousin?

A DNA match for a woman has shown up on my Ancestry DNA as a second cousin with 490 cM. I recently discovered that I am thought to be the half sister of this woman's mother. My full sister shares 446 ...
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Interpreting matches with low cM values and high SNPs (or vice versa)?

On GEDmatch's autosomal one-to-one report, a match contains a column for cM and a column for SNPs values, for each of the matching chromosomes. Normally you look for high cM values as an indicator of ...
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Explaining how all DNA matches are shared with Half sibling?

I have DNA matches from Ancestry, FTDNA, GEDMatch, and My Heritage. My half-sister also tested with Ancestry. It confirms we are half siblings and share the same mother. I do not know who my father ...
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Interpreting runs of homozygosity data to determine how closely parents were related?

According to Gedmatch's Are your parents related? tool, my grandmother's DNA shows several runs of homozygosity (ROH): Chr Start Location End Location Centimorgans (cM) SNPs 3 180690286 ...
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Confirming possible half sibling from AncestryDNA?

It took a few months to process this shocking news from my dna results from ancestry. I am a new at this & did the test with my daughter for fun. Imagine my surprise when someone contacted me ...
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Triangulation with DNA Results - is something amiss?

My 1st cousin 1xR and my Aunt and I have all taken Ancestry DNA tests. For clarity sake I will refer to the parties as "Z", "N" and "R" "R" is related (by document) to "N" as nephew and Aunt "Z" is ...
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3rd cousin DNA match not matching either parent?

I am having trouble figuring this out. A 3rd cousin popped up with 117 cMs shared across 6 segments via Ancestry DNA. She is not a match with my Mom and there is not a common match with my dad's ...