Re: DNA tests for genealogy in Israel #dna


manderlie@...
 

Family Tree DNA or FTDNA  has two offerings you will not find on Ancestry.  Both Y DNA direct  paternal line) and mitochondrial mt DNA (direct maternal line) are included in Family Tree DNA as optional testing results for a fee, with the sample you take and submit by doing a swab (the swab is easier to use for seniors who have trouble with saliva production). The Y and mt DNA profiles are not possible to achieve on the raw data transfer from Ancestry.  Family Tree DNA is the pioneer company who started genetic genealogy. People are confused because the company Ancestry jumped on board much later with specific interest in autosomal DNA.  Of course, they had a large public profile due to previous subscription programs for researching family history incorporating previous platforms like bulletin boards and Rootsweb initially and expanded ultimately incorporating autosomal DNA. Originally the interface was 1:1 comparison as Ancestry and 23 and Me and FTDNA all used the same chip.  A couple of years ago, Ancestry added medical analysis to their results. Because of this, the chip was changed to accommodate. So, there is some compromise in the number of SNPs that are transferred with raw data. If it were me, I would test with FTDNA and support the company who started it all and get the most SNPs I can. The cost has significantly dropped since I tested. I have tested with Ancestry too and think it is a good thing to do.  Ancestry will not accept transfer in raw data.  But a word of caution, those who think they are saving money should consider that when Ancestry changed their chip a couple of years ago to accommodate for medical information, they reduced their noon-medical SNP testing. The results are still valuable, but the transfer can miss information.  The Family Finder test uses the Illumina OmniExpress microarray chip. The chip includes about 696,800 autosomal single nucleotide polymorphisms (SNPs). 23andMe examines about 690,000 predetermined SNPs. That may sound like a lot, but it is only 0.01 percent of the 6 billion DNA letters in the human genome. An excellent blog I suggest those interested read is Louis Kessler’s Behold Blog at: https://www.beholdgenealogy.com/blog/?p=2700 . This article has excellent charts to simplify the numbers and comparison.  Look at SNPs in common between companies before relying on transferring. I would test with both FTDNA and Ancestry and transfer FTDNA results to MyHeritage who uses the same chip as FTDNA, so it is generally a 1:1 match with a SD within range.  Importantly: FTDNA stores your sample for 25 years and thus can-do new testing without mailing costs as science progresses in the field. You can bequest your results to a descendant. You can study the Y and mt lines when you test with this company and if you cannot afford it today, it is on file to look at it later.  If you die, your grandmother dies and science advances and you are operating those kits, you can still learn from that DNA. Other companies do not store the samples.  So, every test you do would be another fee.  Finally, FTNDA does not carry the weight load of subscription fees.  When you test, you own the results. You can always upload to Gedmatch as well and those who upload from other companies can be compared there. If you meet a cousin who tested at Ancestry and you did not and they do not want to transfer results to FTDNA, then you can ask them to transfer to Gedmatch and compare at a neutral site.  Ancestry has a large data base. They have resources to advertise and brand familiarity, so it is well worth testing there too.  Remember people often do one test and do not transfer so the person you seek may be on another platform.
Susan Diamond

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