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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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2answers
97 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 ...
1
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2answers
124 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 ...
0
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1answer
52 views

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
1
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1answer
106 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 ...
3
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1answer
56 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....
4
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1answer
161 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 ...
7
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3answers
644 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 ...
6
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2answers
204 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 ...
4
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1answer
172 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 ...
6
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1answer
126 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 ...
6
votes
1answer
157 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 ...
4
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0answers
30 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 ...
6
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2answers
581 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 ...
7
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1answer
821 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 ...
3
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1answer
593 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 ...
7
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2answers
3k 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 ...
5
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1answer
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 ...
6
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1answer
207 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 ...
4
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1answer
188 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 ...
5
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1answer
1k 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 "...
9
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1answer
510 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 ...
2
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1answer
245 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 ...
7
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1answer
356 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 ...
3
votes
1answer
2k 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 ...
2
votes
3answers
142 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 ...
5
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1answer
7k 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 ...
6
votes
2answers
666 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 ...
11
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3answers
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 ...