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.

33 questions with no upvoted or accepted answers
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4
votes
2answers
212 views

Identifying John Morgan, son of Thomas D. Morgan (1809-1870)?

I have a real dilemma. I have found a DNA link to the Thomas Morgan (1791-1860) family through Frances Denira "Fanny" Morgan (1821-1899), daughter of Benjamin Francis Morgan (1762-1835), who was the ...
4
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0answers
124 views

When the same name or family comes up in ancestors of DNA matches

I am pouring through the family trees of my DNA matches on both GEDMatch.com and Ancestry.com and, while it hasn't helped me solve any road blocks yet in the 2 years since I tested myself, I have ...
4
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0answers
34 views

ySearch Markers

Can any one explain why some of the test on ySearch are listed as FTDNA but have a different set of markers? I.E. in some cases the first 37 markers are missing, in some cases there seems to be a ...
4
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0answers
227 views

Why do I get a better match on mitoSearch than FamilyTreeDNA?

For my cousin's mtDNA test (C52RJ) on FamilyTreeDNA, my closest matches are all 2 mutations away, I exported to mitoSearch, and there I find an exact match with TXANE, and the match shows as coming ...
3
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0answers
46 views

Deciding between two competing theories - who am I anyway?

My great(5)-grandfather Daniel Cooper arrived in the US around 1695 (maybe he was born here, maybe born at sea), and while his descendants are relatively well documented, nothing is known for sure ...
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0answers
61 views

Getting certified as genetic genealogist

Do you have any recommendations on how to get certification as a genetic genealogist?
3
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0answers
161 views

How can you use FamilyTreeDNA's Search tool to contact matches / find contact information?

How can you use FamilyTreeDNA's Search tool to contact matches / find contact information? I have been continually challenged (as described in the challenges below) by trying to figure out how to use ...
2
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0answers
38 views

Determining parent ethnicity

My father and I both took Ancestry.com DNA tests. His came back 100% European Jewish, while mine came back 37% Italian and 63% European Jewish. Does this most likely mean my mom is 26% European Jewish?...
2
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0answers
46 views

Birth Record Missing: Joseph C. (POLEO) O'BRIEN 1921 - 1981

My project invlolves finding the proof of birth for: Joseph C. (POLEO) O'BRIEN (born, orphaned, adopted?) Apparent info (not certain) is: BIRTH 05 JUN 1921 • Brooklyn, Kings, New York, USA DEATH 11 ...
2
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0answers
410 views

Incest and Shared CentiMorgan Theory. Half/Full Sibling and a Single Transverse Palmar Crease

My female ‘half sibling?’ and I, also female, share 2,129 cM. We DO NOT share the same father. DNA testing revealed that conclusively. Ancestry puts us into Close Family/1st Cousin. DNA painter ...
2
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0answers
97 views

Triangulation in DNA, weird match!

I thought I had grasped the meaning of triangulation. Until I saw this match in MyHeritage (see below). What is happening? It looks like the two segments that have the triangulated match are single ...
2
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0answers
49 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 ...
2
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0answers
737 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 ...
2
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0answers
349 views

Autosomal DNA Chromsome Browser - Is there such a thing as a 'family trait' of shared segments?

I realize the passing of genes is approximately 50/50 (reference Generational Loss of Data with DNA testing) with each generation and which genes are passed are commonly referred to as 'random' based ...
2
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1answer
160 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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0answers
54 views

Using DNA to find biological father

I have done both 23 & me and Ancestry trying to gets leads on who in the world my birth father could be. My mom truly can’t recall. I found a first cousin or potential great aunt I think. She ...
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0answers
40 views

Half uncle cM match to niece/nephew not same as reverse match

My mother's half brother and I both submitted DNA samples to Ancestry. His came back 393 cm related to me. Mine came back 795 related to him. Why would there be such a large difference?
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0answers
27 views

Would half siblings share the same DNA links to extended family

I've matched with either a half sibling\aunt or niece on MyHeritage - we chatted and it seems like we share the same father. However, I have links to a 1st cousin once removed or second cousin, for ...
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0answers
32 views

What is the relationship based on shared DNA

We are trying to find out information regarding my mothers biological father side of the family. My mom was adopted in 1945 and later in life discovered her biological mother but not her biological ...
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0answers
41 views

ALL 23andme matches link via one grandparent?

I have spent hours today looking at my 23andme DNA matches, and while I have not checked every single one, it seems to me that ALL of them descend from ancestors of my paternal grandmother. I am 100% ...
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0answers
42 views

How is it possible to have an X-DNA/X-Match match on my father's side as a male myself?

On FamilyTree DNA, I have a match who is very clearly from my paternal grandfather's side. I am a male myself and thought it was only possible to have X-DNA matches on my mother's side. I thought my ...
1
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1answer
294 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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0answers
77 views

R1a backbone SNP pack worth it?

I upgraded to Y-67 and my haplogroup stayed the same (R-M198). Would it be worth it to purchase the R1a backbone SNP Pack to get a more specific haplogroup? I currently can't afford Big-Y. I ...
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0answers
758 views

Understanding Native American DNA at gedmatch.com?

How come gedmatch.com shows my alleged Native American DNA, but ancestry.com, FTDNA.com and 23andme.com does not? Does anyone know why that is? What is the difference between gedmatch database and ...
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0answers
24 views

Using AncestryDNA to verify if sister also aunt

My bio dad adopted my sister. We share the same mother. I recently found her birth certificate, and on it was grandfathers name. It was in German so I do not really understand it all. Our mother has ...
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0answers
41 views

Is 64.2% / 4776 cM full sibling an outlier?

According to 23andme, my younger brother and I (male) matched 64.2% with 4776 cM. That seemed weird since our matches with our parents are the normal ~50% or just under. This is very much not my field,...
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0answers
50 views

3rd Cousin DNA with a person

I share a DNA match with a male person of 152cM coming up as a 3rd cousin. I also share a match with his half brother but much Lower at 45cM. These two share the same father but different mothers. I’...
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1answer
61 views

Distinguishing half siblings from first cousins (possible fathers are brothers) using shared cM

Regarding half siblings, sent my DNA to Ancestry came to a match of half sibling at 1530 cMs @ 99% half sibling however was in contact with such match and he is claiming my father or one his two ...
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0answers
64 views

2nd cousin showing up as DNA match

I recently discovered I shared a DNA match with a lady of 341cMs of whom I don’t know. I’ve since made contact with her and some missing gaps discovered. She has a half sibling (1972cm) - brother , (...
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58 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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0answers
41 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 ...
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0answers
61 views

DNA not supporting linear genealogy between grandparent, child and grandson?

I am his grandmother and should have 300 or more cMs connection. However, we share only 18 or so cMs. My son, (my grandson's father), shares only 17.2 cMs. What's up?
-1
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1answer
85 views

DNA vs Family Tree

I recently got a DNA match for my wife and it was suggested that this man is a 1st cousin once removed or 2nd cousin. When I pursued that branch of the tree to confirm the match, it seems they are ...