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Questions tagged [y-dna]

For questions about Y-chromosome testing for genealogical purposes. Y-DNA is passed from father to son, and therefore is useful for tracing paternal ancestry. This includes Y-STR, Y-SNP, and Big-Y tests.

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Genetic Distance, Different Surnames

I see that in talking about genetic distance between two Y-DNA STR test results frequently uses the phrase "having the same surname", or some similar phrase. Why? "Iligitimate" ...
Charles Taunton's user avatar
1 vote
1 answer
40 views

Using Y-DNA and mtDNA from an ancestry file

Ancestry.com DNA results for me and my wife apparently contain Y-chromosome data and mitochondrial data.  How can we use that to find patrilineal and matrilineal matches on sites like FTDNA and ...
WGroleau's user avatar
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Are Y-DNA matches less accurate in a common haplogroup?

My maternal cousin recently took a Y-DNA test to help with research on my mother's family line. The results are back and he is in haplogroup R-M269. He has 347 matches at 37 markers. I took a test ...
Harry V.'s user avatar
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1 answer
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Finding cousins with Y-DNA

My mother's cousin (JEF) has a twelve-marker (Y-12) Y-chromosome test from FTDNA.  Our earliest known common ancestor (SSF) was born 1817 in Indiana, USA. The first twenty matches as reported by FTDNA ...
WGroleau's user avatar
  • 347
2 votes
2 answers
90 views

Investigating NPE in mid-1700s Virginia

After taking Y-37 DNA test at FamilyTreeDNA, I discovered that I matched 37 of 37 markers to descendants of William Adkins, b. 1689 VA. I have a paper trail back to George Webb, b. 1794, VA. I'm ...
Rick's user avatar
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1 vote
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Calculating Genetic Distance

Is the Genetic Distance between two Y-DNA STR test results simply the number of str values that do not match? For example, if two people have the exact same values for all STR values except DYS413, ...
Baz's user avatar
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3 votes
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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 ...
Betty Crokker's user avatar
2 votes
2 answers
134 views

Y-dna upgrade or SNP pack?

I took the Y-dna12 test first, it came out as J-M67 but I want to proceed to find out my subclade and I can't decide to either get the J2 - M67 & L24 SNP Pack or to upgrade to Y-DNA67. What would ...
user12859's user avatar
3 votes
1 answer
160 views

What can I do with my Y-DNA marker file from LivingDNA?

I took the 3-in-1 test from LivingDNA. The Y DNA result was a haplogroup, plus a 405-line text file that looks like this in part F82/M620 F93/M621/PF6114 FGC41/Y108/M12190 IMS-JST00305/F719/M3636/...
M.M's user avatar
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3 votes
2 answers
1k views

Does AncestryDNA sequence the Y Chromosome, and if so, to what extent?

I have recently read that you can use third party tools like Morley's DNA and Cladefinder to generate your haplogroup from Raw DNA. SInce you get no haplogroup info from Ancestry, do they bother ...
Charlie's user avatar
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Can two Paternal Y-DNA Haplogroups still be identical if they are processed on two different 23andMe Chips?

I have a male match on 23andMe that I'm fairly certain is a Paternal match through my Paternal Grandfather. As far as I understand it, I should have a (nearly?) identical Y chromosome to him. ...
Danny B's user avatar
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2 votes
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haplogroup diversity in the context of genetic diversity

I'm just an average Joe trying to understand the context through the simplest explanation. When I read World Map of Dominant Y-DNA haplogroups distribution, it echoes "differences among human". But ...
JuNanaGo's user avatar
4 votes
1 answer
93 views

Benefit of Y-DNA testing self vs father or grandfather?

I am planning on taking a Y-DNA test. As a male myself, if there is an option to test my father or paternal grandfather instead, would there be any practical benefit? I am not inclined to test more ...
Harry V.'s user avatar
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2 votes
1 answer
100 views

How many STRs should I test for medieval genealogy?

I have been researching my Maltese paternal line for a long time now, and fortunately due to one of my distant ancestors being upper class, my genealogy is well documented up until the around 1490, ...
Charlie's user avatar
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1 vote
2 answers
55 views

Is a new DNA sample required for paternal haplotype or maternal mitochondria analysis

A year ago I sent in a DNA sample to Ancestry for autosomal analysis. I have the RAW DNA data file. Can that data be used with 23&me or another testing company to have mitochondria and paternal ...
Will Carson's user avatar
1 vote
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108 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 ...
fisherman2's user avatar
2 votes
1 answer
73 views

Would it be a good idea to update to Y-67?

I recently tested my dad's Y DNA at the 37 marker level. He has one match with a genetic distance of 1. This person shares our surname. The other match has a genetic distance of 4 and doesn't share ...
goblincandle2's user avatar
3 votes
2 answers
205 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 ...
user3697176's user avatar
  • 1,601
2 votes
2 answers
499 views

No shared X DNA segments found

On FTDNA I match two other Stephens males with the exception of 1 marker over 67 markers. When the three of us uploaded our DNA to Gedmatch, mine from FTDNA Family Finder and theirs from Ancestry, we ...
Warren Stevens's user avatar
1 vote
2 answers
1k views

Different genetic relation strength through maternal vs paternal line?

Is there a different genetic relation strength through maternal vs paternal line? In other words: am I more related to my mother than to my father or are they exactly equal? Or another way to ask it ...
PWD's user avatar
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How many matches can I expect for a Y24 Dna test

I have taken a basic DNA test from Ancestry and got over 700 dna matches. Based on this how many matches can I expect to get from a Y24 Test
Terry Mac's user avatar
1 vote
1 answer
283 views

How distant should cousins be before a Big-Y test is helpful?

I've got a Big-Y and yDNA-111 already done for one cousin with a particular surname and he has a second cousin, once removed that has only tested yDNA-37. They have a shared brick wall that is just ...
WilliamKF's user avatar
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2 votes
1 answer
64 views

Fast changing y-DNA markers

I recently joined a project and it appears they matched me beside another y match of the same name. There appears to be 8 mismatches in the y-DNA markers but they are all in the fast changing markers....
Vance Keslar's user avatar
3 votes
1 answer
222 views

What are chances of a yDNA match by chance and not by close common ancestor?

On FamilyTreeDNA, they have their TiP Report that gives the probability that two matching members shared a common ancestor within the last number of generations. E.g., for a yDNA-37 match with 4 ...
WilliamKF's user avatar
  • 5,307
6 votes
3 answers
2k views

Y-DNA haplogroup R1a1ab2 Z93 Z94 in England?

I have just had my DNA results returned and my Y-DNA has come back as this. I am from East Anglia and my family has been documented in this region for the last thousand years, I am rather confused ...
Andrew Kett's user avatar
5 votes
2 answers
500 views

Y-DNA STR Testing - Zero Matches?

Back in early 2010, I did a Y-12 test on my second cousin via the Genographic Project. Soon thereafter, I transferred the results over to FTDNA and he had zero matches at the Y-12 level. Now, all ...
user4707's user avatar
  • 399
3 votes
1 answer
209 views

Expecting Y-DNA match between 4th cousins to be much closer?

I recently received results from a Y-DNA test between my uncle and a cousin. They are 4th cousins, 1x removed. I would expect them to match very closely as Y-DNA does not change much, however, at 12 ...
Hammy's user avatar
  • 727
5 votes
1 answer
164 views

Incomplete transfers of y-STRs from FamilyTreeDNA to ySearch?

I have used FamilyTreeDNA's transfer to ySearch for each yDNA test I have had done and I just happened to notice today that for a yDNA-111 test, the transfer is incomplete, transferring only 67 ...
WilliamKF's user avatar
  • 5,307
6 votes
1 answer
265 views

Y-DNA match a false positive?

I completed a Family Tree DNA test for Y-DNA. My results show I have only six matches. I have viewed the available trees of 4 of the 6 trees, the others are private and unwilling to cooperate. I ...
Rod Farrell's user avatar
4 votes
0 answers
43 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 ...
JimL's user avatar
  • 41
6 votes
2 answers
1k views

After a Big-Y test on FamilyTreeDNA does it make sense to order further SNP tests?

I ordered the Big-Y on top of my yDNA-111 STR test and it specifies many SNPs now that Big-Y is complete, but FTDNA continues to offer to sell me additional SNP tests and packets, in particular the I1 ...
WilliamKF's user avatar
  • 5,307
7 votes
1 answer
1k views

Why would Y-DNA matches have different paternal haplogroups?

I am researching Clements ancestry and am puzzled that kits that are matches on almost all 111 Y-STR tested markers would be categorized into different paternal haplogroups. Specifically consider ...
Ellen Spertus's user avatar
3 votes
1 answer
1k views

Explaining and interpreting YFull raw data statistics?

YFull displays several statistics about the BAM / Full Genomes sample used to create the YFull report. Unfortunately there is no explanation of what the statistics really mean in terms of impacts on ...
CRSouser's user avatar
  • 5,591
7 votes
2 answers
5k views

Is it common to have no close yDNA matches on Family Tree DNA?

On Family Tree DNA, I have a yDNA-111 test showing only one match at the yDNA-67 level for another test that happens to be 111 also and that has a genetic distance of 7 marker changes and a 50% TIPS ...
WilliamKF's user avatar
  • 5,307
5 votes
1 answer
3k views

If you plan on getting a Big Y test, is there any value in going beyond yDNA-37?

For the FamilyTreeDNA.com yDNA tests, if you are pretty confident you are going to buy the Big Y test, would that fill in your SNPs up to yDNA-111 if you had only purchased yDNA-37 before upgrading to ...
WilliamKF's user avatar
  • 5,307
6 votes
1 answer
336 views

What do the asterisks mean in the Y-DNA Standard Y-STR values table on Family Tree DNA?

In my yDNA results on FamilyTreeDNA.com there are two asterisks on DYS19 and three on DYS389II as shown in this image: What do these mean? I do not see any legend. Does it have to do with how ...
WilliamKF's user avatar
  • 5,307
4 votes
1 answer
477 views

How many generations back is suggested by 6 mutations on a yDNA-67 match?

I have a yDNA-111 test that finds a match with a yDNA-67 test with 6 mutations and a name variation, Thorp vs Tharp. Statistically, how many generations away would our common ancestor be to give a ...
WilliamKF's user avatar
  • 5,307
5 votes
1 answer
2k views

How to understand differences in paternal haplogroups from different companies?

23andme (version 1) gives a man's paternal haplogroup as j2a1b1*, which is equivalent to J-M92 (YCC 2002/2008 shorthand), according to the table Phylogenetic history contained in the article "...
Ellen Spertus's user avatar
9 votes
1 answer
657 views

My Father passed away - next test(s) on what remains of his DNA sample?

I posted this general question over at the forum on FamilyTreeDNA. Though I received a reply, there is still no answer to my question, so I thought I'd try my luck at posting here. Anyhow, in early ...
user4707's user avatar
  • 399
2 votes
1 answer
378 views

ISOGG Y-DNA Haplogroup Tree download

On isogg website (http://isogg.org/tree/ISOGG_YDNATreeTrunk.html) I only found the html-based version of a Y-dna tree, that is not very easy to use. I want to download in to my personal computer and ...
Basil's user avatar
  • 21
7 votes
1 answer
476 views

Template or Tool for Comparing Y-DNA Results

I am looking for a tool, preferably an excel template, I can run on my computer that I can use for comparing Y-DNA results across multiple types of Y-DNA tests. I realize some version of this exists ...
CRSouser's user avatar
  • 5,591
3 votes
1 answer
5k views

What is considered a strong match on a Big-Y DNA test?

I have done Big-Y on FamilyTreeDNA for a single individual and considering others as well as using the YFull interpretation service without fully understanding how to use it because I wanted to ...
CRSouser's user avatar
  • 5,591
2 votes
3 answers
184 views

Forensic Y-STR DNA test provider that can provide results at greater than a Y-37?

I am trying to research a family line that shares a name, but not sure if anywhere in the distant or near past we share a common ancestor and both sides are interested in doing a Y-DNA test, we just ...
CRSouser's user avatar
  • 5,591
8 votes
2 answers
18k views

Genetic Distance to Generations Calculation for Y-STR DNA tests

As a follow-up to the Q&A on Generational Loss of Data with DNA Testing, which described generational detail loss really well for Autosomal, I am now looking for a calculation or some basic ...
CRSouser's user avatar
  • 5,591
6 votes
2 answers
943 views

How likely is it that ftDNA made a mistake about my y-haplogroup?

I bought a National Geographic Geno 2.0 kit, tested by FamilyTreeDNA, and it says that I am of haplogroup that is very statistically unlikely for where my family is from. ftDNA did not check any SNPs ...
user avatar
11 votes
3 answers
2k views

Generational Loss of Data with DNA Testing

I have personally done the Y-DNA, the add-on Y-block with FamilyTreeDNA, mtDNA, and new FamilyFinder/AncestryDNA (via Ancestry) which i plan in transferring to FamilyTreeDNA just recently as a base ...
CRSouser's user avatar
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