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Some of additional matching chunks GEDMatch identifies are on different chromosomes though, so its not just a result of mismatching gaps being accepted.

If I do a 1 to 1 comparison between me and the match on both sites, it seems that 23andMe is missing some fairly large chunks (5CM to 10CM) so it doesn't seem to be counting up ancient DNA here.

And, more importantly, which one is more accurate?

Several of my 23andMe matches have also uploaded their results to GEDMatch, and consistently it seems that the 23andMe centimorgan count is lower (usually by around 25%) than the one I receive for...

Also sounds like the first case you talked about was a known case of illegitimacy as opposed to a hidden one.

I'm not disputing that this is sometimes the case, but apart from the centimorgan count we don't have any reason to suspect illegitimacy.

Not sure if this is off topic, but I thought I met get some decent advice here as I have tried elsewhere and not been able to get anywhere.

Me and my maternal 1st cousin (her dad and my mum are...

Just curious. How many Y chromsome SNPs did Ancestry test vs 23andMe? I've counted my 23andMe SNPs and it adds up to 3500 for YDNA.

Do you know what happens if you try and import Ancestry's Raw DNA into a Y DNA calculator like Morley's DNA?

One of the main reasons I purchased a test from 23andMe is the fact that their tests gives you your haplogroup. In fact, its probably one of their main USPs. However, I have read since that you can...

Yeah, this is what I saw that made me want to get Ancestry DNA. 23andMe's tree feature is really crap.

Aren't full genome tests pointless for ethnicity though? I read that only a tiny fraction of the genome has DNA mutations which can serve as markers for ethnicity. The tests may be more useful for...

It wouldn't be charging extra, it would be charging less, instead of paying another £80 for an Ancestry test, they could allow you to upload your 23andMe data for a smaller fee like £20 or so, to...

I'm not particularly interested in ethnicity calculations as I can understand my ethnicity rather well from genealogy.

Do you reckon due to the decline in DNA sales that's starting to occur, Ancestry and 23andMe might start allowing users to import Raw DNA from other sites for a small fee? Might be a way to keep...

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Could you elaborate on this? I have downloaded my Raw DNA from 23andMe and imported into GEDMatch and MyHeritage, which has some free features like basic DNA Matching.

I recently got a 23andMe test and am quite happy with the results, but was a bit disappointed that not many people integrated a tree into their profiles, so its nigh on impossible to figure out how...

If I use this to get my terminal SNP, how do I find other people with these or close SNPs? Obviously, the terminal SNP information on its own doesn't tell you anything extra unless you have others to...

Apparently R1a is very rare in Malta. I am one of only 3% of Maltese men that have it.

Will check this one out, cheers.

It was only part of my 23andMe breakdown, so they don't do deep Y DNA testing. Might get one of the in depth Y DNA tests from Family Tree DNA at some point.

Any idea how old this particular subclade is? This would give me an idea of the general historical timeframe of when it could have come over.

I have just found out that my haplogroup is R1a1a1b1a2b, also known as R-CTS 1211. I would like to know where it is likely to have originated from and how it ended up in Malta. I tried researching it...

Can you explain please?