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

Yes it is very common to only have few or no matches at higher levels. I recently have been advising someone who got screaming mad (literally) about spending so much money and having no matches.. so ...
CRSouser's user avatar
  • 5,591
7 votes
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Y-DNA haplogroup R1a1ab2 Z93 Z94 in England?

The service you used, Living DNA, seems to try on its web site to avoid telling much about what kind of testing it is doing, especially avoiding standard terms. Digging though its help system, it ...
RobertShaw's user avatar
  • 3,877
7 votes
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If you plan on getting a Big Y test, is there any value in going beyond yDNA-37?

I think there is still value to upgrading beyond Y37 (to at least 67) even if you are 100% confident you are going to do a BigY. Short version: You get near term genealogical value matching with Y67+ ...
CRSouser's user avatar
  • 5,591
6 votes
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What do the asterisks mean in the Y-DNA Standard Y-STR values table on Family Tree DNA?

In the FTDNA help pages are the following notes: ** DYS19 is also known as DYS394. *** The Family Tree DNA and the Genographic Project report DYS389II differently. So the asterisks are just ...
Harry V.'s user avatar
  • 18.9k
6 votes

Y-DNA match a false positive?

It is extremely rare for Y-DNA analysis to give a false positive. However, the people you match to may connect 10, 20, or 30 generations back which is likely not genealogically relevant since you won'...
lkessler's user avatar
  • 16.7k
6 votes
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Does AncestryDNA sequence the Y Chromosome, and if so, to what extent?

First a comment on terminology – AncestryDNA and none of the autosomal DNA testing companies do "DNA sequencing". They do use single nucleotide polymorphisms (SNP) and/or short tandem ...
Harry V.'s user avatar
  • 18.9k
5 votes

Different genetic relation strength through maternal vs paternal line?

You inherit exactly half your DNA from each parent. So, no, you are not more related to one parent or the other. However, it is unlikely for you to inherit exactly a quarter of each of your ...
Leah Worster's user avatar
5 votes
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How many generations back is suggested by 6 mutations on a yDNA-67 match?

If you use Moses Walker's MRCA Calculator and plug in their suggested mutation rate of .0043, you can get an approximate answer to your question. The tool only goes down to 62 of 67 matches, but it is ...
lkessler's user avatar
  • 16.7k
5 votes

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

In our case, based on research we figure there aren't many living males left with the surname that have tested. We did the yDNA-67 test and we have no matches at the 67 marker level, 5 matches at the ...
Hammy's user avatar
  • 727
5 votes
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After a Big-Y test on FamilyTreeDNA does it make sense to order further SNP tests?

Before I ordered any extra SNP tests, I would wait a few weeks or months. Big Y tests an awful lot of markers, and unlike most other tests, it also discovers hitherto unknown markers (kind of like a "...
John's user avatar
  • 66
5 votes
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Why would Y-DNA matches have different paternal haplogroups?

The answer is actually relatively straight forward that you started to lead onto yourself. It really comes down to the level of testing the individual has done, and further testing may actually ...
CRSouser's user avatar
  • 5,591
5 votes

No shared X DNA segments found

The lack of shared X-DNA segments is to be expected and does not imply you are unrelated. Men get their X chromosome from their mother and their Y chromosome from their father. If two men had the same ...
Ellen Spertus's user avatar
4 votes

Generational Loss of Data with DNA Testing

Let me see if I can answer your three questions: What's the benefit of A-E for Autosomal? Autosomal testing is excellent for finding relatives in non-endogamous families up to about 5th cousins ...
lkessler's user avatar
  • 16.7k
4 votes
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Different genetic relation strength through maternal vs paternal line?

For the record and for those interested, I want to give a little more detail than is in Leah's answer. Leah's answer is a very good overview and has the important points that a beginning genetic ...
RobertShaw's user avatar
  • 3,877
4 votes

Explaining and interpreting YFull raw data statistics?

I've been doing a bit of research on the subject myself and might be of some assistance. ChrY BAM file size is straight forward, pretty much just the file size of the raw data that maps to the Y ...
KSDA's user avatar
  • 41
3 votes

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

In general I would say no, but there are couple of reasons in which you might. I covered them in this answer "If you plan on getting a BigY is there any value in going beyond Y37 to a degree too. ...
CRSouser's user avatar
  • 5,591
3 votes

Y-DNA STR Testing - Zero Matches?

Y-chromosome STR tests measure particular aspects of the DNA (tandem repeats) which happen to change at a faster rate than most other forms of DNA change. Each STR site ("DYS" locus) tends to have an ...
RobertShaw's user avatar
  • 3,877
2 votes

Genetic Distance to Generations Calculation for Y-STR DNA tests

For 37 markers, I co-author a paper that can be find at http://tracingroots.nova.org/SS-WEHGDPaper.pdf that we used to estimate when STR mutations took place. If you date when a common mutation take ...
sidney Sachs's user avatar
2 votes

How many matches can I expect for a Y24 Dna test

You may get a dozens matches for Y24 tests. It does not correlate with AncestryDNA's number of matches, because they are totally different and tests different things. AncestryDNA test is co-called ...
GEORG GAAL's user avatar
2 votes
Accepted

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

In terms of financial efficiency, the Big Y is more preferrable than yDNA-111. Why? Because (let's imagine) that you got the yDNA-111 result for this particular person. You also has the result for ...
GEORG GAAL's user avatar
2 votes

Y-DNA STR Testing - Zero Matches?

The match list is very limited to persons who are at distance of 10 steps from you at Y111... Some mutations may be rare, but others can happen between generations simultaneously in multiple places. ...
George Gaál's user avatar
  • 1,075
2 votes

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

The proper test to take in this situation is the Y-DNA test. Y-DNA as you have noted gets passed down the straight male line only. Why not autosomal tests. The 23AndMe autosomal test you did tests the ...
Bill's user avatar
  • 504
2 votes
Accepted

Can two Paternal Y-DNA Haplogroups still be identical if they are processed on two different 23andMe Chips?

R-L165 is a subclade of R-L51 so you two definitely have a common straight line male ancestor. But the real question is how many generations back is your most recent common ancestor (MRCA). The only ...
Bill's user avatar
  • 504
2 votes

Are Y-DNA matches less accurate in a common haplogroup?

With y-DNA, unless you get a near-perfect match at 37 markers (distance 0 or 1), it's unlikely you'll find a common ancestor in genealogical time. The total number of matches isn't nearly so ...
cleaverkin's user avatar
  • 2,804
1 vote

No shared X DNA segments found

As previously indicated, the lack of matching X-DNA is not significant. A perfect y-DNA match implies a MRCA within 5-6 generations, a single mismatch implies a MRCA within 10-12 generations (roughly ...
cleaverkin's user avatar
  • 2,804
1 vote

How many STRs should I test for medieval genealogy?

Family Tree DNA offer a test for 37, 111 or 700 STRs. Which one of these will likely be best value for money for my purposes? I believe that all of them will be non-informative. I'll explain. The ...
George Gaál's user avatar
  • 1,075
1 vote

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

I have sent your qestion to the 23andMe helpdesk and they said that they don't offer this service. It is not possible to import genetic data from other services into a 23andMe account. Therefore ...
Peter Kühne's user avatar
1 vote

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

In Y-DNA STR tests like this, the main advantage of having more markers tested (e.g. 67 versus 37) is being able to tell which matches are the closer ones and which ones are more distant when you have ...
RobertShaw's user avatar
  • 3,877
1 vote

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

As a free, fairly quick, and dirty test, you could ask your Swiss contact whether he knows a couple of males, from both populations, who are happy for their genotyped Y-Chromosomes to be compared,to ...
arober11's user avatar
  • 171

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