We’re rewarding the question askers & reputations are being recalculated! Read more.

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.

Filter by
Sorted by
Tagged with
1
vote
1answer
50 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 ...
3
votes
2answers
76 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 ...
2
votes
1answer
83 views

Convert tellmeGen DNA file to FTDNA file or similar to upload it

I have a DNA file from tellmeGen and was wondering whether I can convert the file to an ancestryDNA, FTDNA, MyHeritage or similar file format in order to upload it to myHeritage, FTDNA or DNA.Land for ...
0
votes
1answer
49 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 ...
0
votes
1answer
101 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 ...
0
votes
1answer
70 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 ...
0
votes
1answer
49 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 ...
2
votes
1answer
85 views

How accurate is Ancestor Timeline of 23andMe?

My Ancestry composition at 23andMe states: "You most likely had a French ancestor, second, third, fourth or fifth great grandparent who was 100% French born between 1760 and 1850." How accurate is ...
1
vote
1answer
40 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 ...
0
votes
0answers
18 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? ...
1
vote
1answer
42 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 ...
0
votes
0answers
16 views

Does 1,427 shared cM indicate half-siblings? [duplicate]

I share 1427cm 54 segments with a close family to 1st cousins with a probability of 93.7% to grandparent, aunt uncle or half sibling. All of my info is that he is related on my maternal side, ...
0
votes
1answer
42 views

Does match sharing 952 cM indicate grandparent or great uncle?

My mother was adopted and we are trying to find the parents. I have a DNA match that is 952cM and 38 DNA segments. What is the chance of this being my grandparent? It says 1st cousin and we know ...
0
votes
1answer
59 views

Does sharing 1,249cM indicate half sibling?

My husband was raised by his older half brother. We have been told throughout the years that he is actually my husband father.We ran an ancestry test with his daughter. Results were sharing 1249cm ...
1
vote
1answer
73 views

Ancestors missing from ThruLines?

At AncestryDNA, until a few days or so ago, all my expected direct ancestors were listed correctly by ThruLines. Now when I look at them some of them have gone missing. For example, today I can only ...
3
votes
1answer
78 views

Seeking DNA-test for family membership of ancestor 400 years back along paternal lines?

I have foolishly accepted to act as an advisor to my uncle (on my mother's side), and find that I am quite unprepared to do so. He is trying to follow up a family tradition that his x-GF (all on his ...
4
votes
2answers
82 views

Can genetic genealogy identify father of male first cousins with same first name?

Samuel had two sons, Joseph and Abraham in the 1740's (in New Jersey) Joseph had a son, Levi Abraham had a son, Levi One of these (Levi) sons has no further history, the other Levi married and had ...
0
votes
1answer
95 views

Family Networks at Living DNA tells me to Keep Fishing?

Late last year (8 months ago) I accepted an offer via FindMyPast to upload my AncestryDNA results to Living DNA. Three months later I followed the instructions in an email from Living DNA to opt-into ...
1
vote
1answer
52 views

Using AncestryDNA to work out whether mother or father is parent of half sibling?

How do I work out from viewing my shared matches on AncestryDNA which one of my parents is the parent of my half sibling?
0
votes
0answers
16 views

Does 1,957 centimorgans indicate half-siblings? [duplicate]

I have recently had a DNA test and have a shared match of 1957 over 50 segments with one of the matches. They are not interested at the moment in communicating. I was brought up as an only child, so ...
1
vote
2answers
101 views

Does 1,864 centimorgans indicate half-siblings?

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 ...
0
votes
1answer
65 views

How many generations is needed to go back to get an ethnicity estimate without a DNA test?

I'm a 3rd generation Canadian meaning that my great-grandparents were from Europe and my grandparents are Canadian born. I haven't completed my family tree yet but from the looks of it most of my ...
-2
votes
2answers
54 views

DNA siblings or cousins

If my mother’s sister and my fathers brother have a have a daughter, how close will her DNA be to mine? Would we be as close as half siblings?
3
votes
0answers
60 views

Getting certified as genetic genealogist

Do you have any recommendations on how to get certification as a genetic genealogist?
1
vote
3answers
93 views

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 ...
0
votes
1answer
123 views

Assessing Biogene DNA results for half-sibling?

My sister and I have a perplexing situation. She believed a family friend to be a half brother, so they got a test at Biogene DNA. It states: Based on the results of the analysis obtained from the ...
-1
votes
1answer
38 views

Testing siblings DNA to determine full siblings? [duplicate]

I have done a sibling DNA test to determine if my children are full siblings or not. There was a possibility that my eldest daughter could have been her father's brother’s and not actually his. I ...
0
votes
1answer
79 views

Seeking software to help triangulate segment DNA matches?

Every time I have a significant group of DNA segment matches, I enter their entire genealogical tree into my family database. Then I need to compare each of these family trees with each of these ...
0
votes
1answer
32 views

Difficulty providing a saliva sample for DNA testing [duplicate]

I find it difficult for medical reasons to generate the spit needed to do a genealogy DNA test. What are my options?
1
vote
1answer
121 views

How many years back are these Gedmatch European matches?

I got many matches on the Gedmatch website that are from the same heritage background (Irish/English/Dutch/German/Spanish/French). The total cM of shared DNA runs from 10 to 32 cM. The most common ...
3
votes
1answer
48 views

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 ...
0
votes
0answers
36 views

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 ...
1
vote
1answer
72 views

Cousin claiming to be half sister?

Thought to be cousins, fathers are brothers, both male parents are deceased. Is it possible to DNA test accurately enough to verify half sibling when female cousin is daughter of brother of my ...
1
vote
1answer
50 views

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 ...
2
votes
1answer
34 views

Will half-brother or half-sister DNA provide more relevant info?

I was adopted and have identified my birth mother. I have 2 half-siblings though her—a brother and a sister. It turns out that my father is either the same as their father OR his brother. Would my ...
1
vote
1answer
75 views

Does 1,845cM shared indicate possible half sibling?

I was adopted in 1958 when I was 14 months old. I have finally found my birth mother and also that I had 2 half-brothers. They told me that mom had had another baby when that she gave up for ...
-2
votes
2answers
89 views

Private DNA Test Results for Half Sibling

I have 2 alleged fathers and have recently ruled out one of them with a private DNA test. I am now trying to determine whether the other is my father but he is deceased, so I am testing with one of ...
1
vote
1answer
268 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 ...
-2
votes
1answer
46 views

Can ‘junk DNA’ be tested to arrive at genealogy insights?

I’m intrigued as to how much ‘junk DNA’ differs between relatives and wonder which DNA testing companies offer such tests?
1
vote
1answer
44 views

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). ...
1
vote
1answer
164 views

Interpreting results of siblingship test?

My sister and I suspect we have different fathers. We took a siblingship test through DDC. The results are a little confusing and honestly, they put our wet swabs each in a paper envelope and then ...
1
vote
3answers
59 views

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 ...
4
votes
1answer
114 views

Possible Half Sibling

I was adopted as a small child and have never known my natural mother or father. I recently completed an AncestryDNA test and have been matched against a lady with a score of 1,912 cM across 73 ...
5
votes
1answer
76 views

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 ...
3
votes
1answer
59 views

Which type of DNA test could help spot ancestry from father's great-grandmother?

My father and his sisters have claimed that their great-grandmother was of a different race from the rest of my family. I've tried 23andMe, and I didn't see any interesting results at 3% of my ...
2
votes
2answers
88 views

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 ...
2
votes
1answer
98 views

Sisters who match to me have very different centimorgans?

I have done a DNA test and show a 2nd cousin match with 313 cM and then a 4th cousin match with 67cM yet these two matches are sisters with the same parents. How is this possible?
0
votes
0answers
59 views

Understanding DNA ethnicity result? [duplicate]

I have been trying to understand a DNA result and have been reading lots of info and asking questions of Ancestry.com. Still not finding an explaination that will help me move forward. I apologize if ...
2
votes
1answer
293 views

Understanding West Eurasian DNA when no European ancestry?

A DNA land and GenePlaza DNA test reports that I am 73% South Asian, 24% Central Asian and 2.8% Mediterranean Islander. It then concludes that I'm mostly West Eurasian. How is this possible when I ...
4
votes
1answer
192 views

Why do parent and child share more cM than full siblings?

According to the shared cM project, a parent and child share 3330-3720 cM (99th percentile). Full siblings share 2209-3384 cM (99th percentile). In other words, almost all people share more DNA with a ...