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7

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+ matches. This may change as more BigY's are done (they have only been out 2-3 years) and the tools around it improve, but as of May 2016 this is my position. ...


5

Most companies, e.g. Family Tree DNA, simply use the SNPs from the chip used in the DNA test when reporting their results. The Autosomal SNP comparison chart at International Society of Genetic Genealogy (ISOGG) wiki states that Family Tree DNA test with 698,179 SNPs. They also report only using those SNPs. GEDmatch's SNP counts are a bit higher than ...


4

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 "full system scan" on your computer, if that's a proper analogy). Whoever is studying your results needs some time to analyze what has come in. Also, ask Family ...


4

The only utility I know of that converts autosomal files is Autosomal DNA Converter by Felix Immanuel. The V2.0 change is new and happened only a few months ago. This utility would need to be updated to perform this function. Unfortunately, the author stopped updating his DNA utilities a few years ago. But if you need this conversion done, you could ...


4

I'm by no means an expert, but given that the second test confirmed the result in question from the first, I would be inclined to accept the answer as valid, unless both tests/testers are known to have a high rate of mistakes, in which case you may wish to re-test. In terms of the intriguing result, it's possible that what you think you know about your ...


3

My understanding is as a general rule of thumb 'to start with' used by some of the more advanced Big-Y/Y-Full groups in terms of known SNP differences as FamilyTreeDNA displays the information is that if one can reach a point of 5 "Known SNP Difference" up to about 10 SNPs that there is likely a connection in likely the last 500 'or so' years which is ...


3

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. The primary one is that the BigY test is a discovery test looking to detect ANY SNPs. The problem with this discovery test is that it misses SNPs. That is why a ...


2

Ignore the SNP counts Centimorgans are a weighted unit of measurement. The cM number depends entirely on the location of the segment and has little to do with actual length. The SNP number is the actual length (more or less since all commercial DNA tests with matching only test a fraction of total SNPs). Sure, the SNP number can be useful to advanced ...


1

Ancestry DNA tests processed after May 2016 by the V4 chip. There is still not a projected date when the update will take place as of today (9/28/2016). While not the apples to apples conversion you are looking for, you might try uploading your Ancestry DNA file to GEDMATCH. There are several useful resources there.


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