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DNA Analysis

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    #482
    metaoblivia
    Registered Users Posts: 2,256 ✭✭✭metaoblivia


    Wyldwood wrote: »
    Yes an NPE (non-parental event) was my first thought too as he only shares 897 cms with his niece when the average uncle/niece is 1700. Time for me to keep my mouth shut I think.

    Sorry, don't know where that smilie in the heading came from .. nothing to smile about

    I'll just throw it out there that I match with my paternal half-uncle at 950cMs. And my dad was definitely the result of a NPE (they're siblings through his bio father).

    I advised my mom to buy my grandfather a comprehensive Y test since he's 91 years old and the last male in his line (he had only daughters and has no living male cousins from a paternal uncle). His paternal line goes back to Donegal according to the records, so we'll see if the haplogroup goes along with that.


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    #483
    judeboy101
    Banned (with Prison Access) Posts: 3,246 ✭✭✭judeboy101


    Hey all, myself and mrs judeboy treated ourselves to dna kits we sent them off Wednesday, ill be back in 6-8 weeks with plenty of questions as my paternal line has a massive black hole in it and it's a taboo issue with my auld fella and his siblings.


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    #484
    pinkypinky
    Moderators, Society & Culture Moderators Posts: 6,616 Mod ✭✭✭✭pinkypinky


    Which company did you test with?

    Genealogy Forum Mod



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    #485
    judeboy101
    Banned (with Prison Access) Posts: 3,246 ✭✭✭judeboy101


    pinkypinky wrote: »
    Which company did you test with?


    ancestry as there was deal on for 2packs lol. It was herself that got them so I'm not going to point out any obvious deficiencies. I'm assuming ftdna probably better for paternal via y-chromosome analysis?


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    #486
    srmf5
    Registered Users Posts: 311 ✭✭srmf5


    Ancestry started testing my mum's kit on 20 Dec and they finished on the 29 Dec so if you tested with them it might come back quicker than expected. She got 98% Irish. It was interesting going through her matches since a man from town came up as a 4th cousin that we had no known connection to.

    I personally prefer Ancestry for autosomal testing since it shows shared matches which can be helpful and I find the online trees easier to view. If you want to just look at the paternal line or maternal line, then FTDNA is the way to go for that.


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    #487
    pinkypinky
    Moderators, Society & Culture Moderators Posts: 6,616 Mod ✭✭✭✭pinkypinky


    Ancestry doesn't do Y testing, just autosomal.

    Genealogy Forum Mod



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    #488
    tedheavenly
    Registered Users Posts: 10 ✭tedheavenly


    If you have tested with ancestry and are curious about your Y-DNA haplogroup, there are a few ways to get somewhat accurate information from your raw AncestryDNA results (but not on the Ancestry site). But obviously its better to do the dedicated test at FTDNA to learn more about your Y results.
    I personally like the fact that Ancestry can be transferred to GEDmatch and FTDNA, and that there are way more trees (and matches) to work with on Ancestry vs. The rest.

    For autosomal tests I dont think you can look past AncestryDNA, and it is improving all the time e.g. genetic communities. Theoretically, the more people that test, the more refined the Genetic Communities could get, which is exciting!


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    #489
    tedheavenly
    Registered Users Posts: 10 ✭tedheavenly


    judeboy101 wrote: »
    Hey all, myself and mrs judeboy treated ourselves to dna kits we sent them off Wednesday, ill be back in 6-8 weeks with plenty of questions as my paternal line has a massive black hole in it and it's a taboo issue with my auld fella and his siblings.

    How far back is the black hole? From my experience you may have higher chances of solving it (depending on how recent it is) with an autosomal test versus a Y test. There are much less matches for Y tests, hardly any trees, and very few close matches to work with (unless you're American with colonial ancestry). Just my tuppence worth :)


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    #490
    BottleOfSmoke
    Registered Users Posts: 83 ✭✭BottleOfSmoke


    Saw FB posts this morning from people reporting their MyHeritage matches had skyrocketed to thousands. I checked mine - I've gone from 8 to 870. As I'm the sceptical type I'm trying to figure out if they're spoofing or if they've genuinely fixed issues with their algorithms.


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    #491
    p15574
    Registered Users Posts: 753 ✭✭✭p15574


    BottleOfSmoke wrote: »
    Saw FB posts this morning from people reporting their MyHeritage matches had skyrocketed to thousands. I checked mine - I've gone from 8 to 870. As I'm the sceptical type I'm trying to figure out if they're spoofing or if they've genuinely fixed issues with their algorithms.

    New blog post by MyHeritage, which includes a detailed explanation of why there are more matches:
    MyHeritage wrote:
    We’re excited to announce major updates and improvements to DNA Matching rolled out today for all our users. Anyone who took a MyHeritage DNA test, and anyone who uploaded DNA data from another service, will now receive more accurate DNA Matches; more plentiful matches (about 10x more); fewer false positives; more specific and more accurate relationship estimates; and indications on lower confidence DNA Matches to help focus research efforts...


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    #492
    leck
    Registered Users Posts: 1,357 ✭✭✭leck


    tedheavenly wrote: »
    If you have tested with ancestry and are curious about your Y-DNA haplogroup, there are a few ways to get somewhat accurate information from your raw AncestryDNA results (but not on the Ancestry site). But obviously its better to do the dedicated test at FTDNA to learn more about your Y results.
    I personally like the fact that Ancestry can be transferred to GEDmatch and FTDNA, and that there are way more trees (and matches) to work with on Ancestry vs. The rest.

    For autosomal tests I dont think you can look past AncestryDNA, and it is improving all the time e.g. genetic communities. Theoretically, the more people that test, the more refined the Genetic Communities could get, which is exciting!
    I'm curious what you mean by that? My brother tested with Ancestry. I didn't know there was anyway of using the raw results to figure out haplogroup.


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    #493
    Ipso
    Closed Accounts Posts: 5,995 ✭✭✭Ipso


    The part of the Y chromosome that contains the snp's may have been covered in the test but they may not report on it (I have a feeling that they do offer Y Haplogroup tests). Your haplogroup is determined by a specific mutations and if you know what to look for, you may be able to determine it.

    http://www.geneticgenealogist.net/2016/01/how-to-get-ydna-haplogroup-from.html


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    #494
    Ipso
    Closed Accounts Posts: 5,995 ✭✭✭Ipso


    BottleOfSmoke wrote: »
    Saw FB posts this morning from people reporting their MyHeritage matches had skyrocketed to thousands. I checked mine - I've gone from 8 to 870. As I'm the sceptical type I'm trying to figure out if they're spoofing or if they've genuinely fixed issues with their algorithms.

    I have over 3,000 matches there now. When I first uploaded to it I had matches that were not related, but they fixed that.


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    #495
    leck
    Registered Users Posts: 1,357 ✭✭✭leck


    BottleOfSmoke wrote: »
    Saw FB posts this morning from people reporting their MyHeritage matches had skyrocketed to thousands. I checked mine - I've gone from 8 to 870. As I'm the sceptical type I'm trying to figure out if they're spoofing or if they've genuinely fixed issues with their algorithms.
    For those who either tested with MyHeritage or uploaded there, are the matches found on MyHeritage consistent with the matches seen on GEDmatch (in the cases where people have kits in both places)? I belong to a GEDmatch group and I'm always slightly dubious when people post about their matches on MyHeritage.


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    #496
    bluezulu49
    Registered Users Posts: 229 ✭✭bluezulu49


    leck wrote: »
    For those who either tested with MyHeritage or uploaded there, are the matches found on MyHeritage consistent with the matches seen on GEDmatch (in the cases where people have kits in both places)? I belong to a GEDmatch group and I'm always slightly dubious when people post about their matches on MyHeritage.

    I tested with MyHeritage and uploaded the results to Gedmatch and FTdna. My closest match in each of the three is the same individual.
    Results as follows
    Total cM, Total Segments, Longest Segment
    MyHeritage 100.9, 7, 25.6
    FTDna 140, ?, 25
    Gedmatch 99.7, 5, 30.4

    The Gedmatch longest segment seems anomalous but I suspect the differences in total cM may be due to different minimum segment sizes (7 cM in the case of Gedmatch).

    The number of my matches in MyHeritage jumped exponentially over the weekend and interestingly, one person who was previously a match is now noted as being unrelated.
    I find that navigating the matches in MyHeritage is difficult due to the low number of matches per page, much easier to look at the FTDna and Gedmatch lists.


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    #497
    tonycascarino
    Registered Users Posts: 1,373 ✭✭✭tonycascarino


    Just curious, but in relation to the DNA test by Ancestry, how far back in years does it realistically detect your ethnicity from?


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    #498
    pinkypinky
    Moderators, Society & Culture Moderators Posts: 6,616 Mod ✭✭✭✭pinkypinky


    The dawn of time....the ethnicity is all just a bit of fun. It shouldn't be taken seriously.

    Genealogy Forum Mod



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    #499
    whatswhat
    Registered Users Posts: 371 ✭✭whatswhat


    I got the Ancestry DNA kit for Christmas just gone. Having been researching my family tree for a good while on and off, I didn't think there would be many surprises for me as I've traced my Fathers line back to 1600s [all English] and I knew my Mother was from Irish roots only down her paternal line but she is English too, as indeed am I but have lived the past 10 years here in Ireland.
    When the results came back 59% Irish, 35% English, 3% Scandinavian and 1% Native American Indian???? I was blown away. It gave me 156 5th/6th cousins [who the majority it seems all live in America] but like someone mentioned earlier in this thread, most of them have no trees to compare, or indeed don't bother to reply to messages sent to find a connection? This seems a shame really.

    Needless to say the results have given me more questions to answer now than I ever had before but it's so fascinating!!

    Today, I stumbled upon this thread by accident but so glad I did!!
    There are some really really helpful folk on here, giving solid help and advice. I had no idea about Gedcom but getting straight on it now and some of the links posted to other sites I knew nothing of, are fantastic, you're all a helpful bunch :]
    Massive Thanks.


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    #500
    dubhthach
    Registered Users Posts: 3,284 ✭✭✭dubhthach


    What should be remember is that the 'Irish' category in AncestryDNA is really 'Irish, Scottish and Welsh' it appears to be a component that just happens to be modal in modern Irish populations but probably reflects wider insular connections. I would also say that any results under 3% are subject to 'calculator effect'. Basically the calculator will try and find best match.

    I should point out though that all modern Europeans share a deep ancestral connection to Native Americans anyways, as one of the 'ancestral' population components to modern Europeans is 'Ancient North Eurasian' -- an extinct 'meta-population' that contributed to both modern Europeans and modern Native Americans (in case of Native Americans they are a mix of a East Asian like population and ANE)


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    #501
    tedheavenly
    Registered Users Posts: 10 ✭tedheavenly


    Sorry for the delay, never got any notification about a response to my comment. Here's the link worth reading. A quick Google search describes other similar methods of doing the same thing; http://www.geneticgenealogist.net/2017/08/updated-method-to-get-ydna-haplogroup.html


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    #502
    spurious
    Moderators, Category Moderators, Education Moderators Posts: 27,111 CMod ✭✭✭✭spurious


    I've rooted out a few 'twice removed' cousins through the DNA. It tells us there is a link and we just have to keep looking.

    One we confirmed (or got on the right track to confirming) by something as simple as my pointing out we have a lot of Sarah/Sadie girls in the various threads of the family. Sure enough, the woman I was emailing remembered her Granny mentioning a sister with that name and we knew we were on the right track.

    The DNA's great but it doesn't replace the footwork.


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    #503
    DamoRed
    Registered Users Posts: 394 ✭✭DamoRed


    Given the concerns arising from recent revelations about my paternal grandparents and their children, it seems almost certain the only way to confirm one way or another is by DNA testing. However, as I'm reading the recent pages, I'm seeing terms like 'Y-testing' 'Haplogroup' and I've no idea what any of them mean and subsequently what type of test tells what, or what type of test is best to do.

    For those not familiar, it was said by my cousin, that my paternal grandparents 'raised/adopted' 4 girls, but, that 'as far as he knew' my father and his brother were their natural children. It'd be more comforting to know for certain beyond simple misunderstandings.

    Is there any site I can go to where these and other terms are explained and a recommendation for what test I take? From the simple background given above, it would appear what I need, is a test that determines whether I follow the paternal familial line. With that in mind, what kind of test do I need to do?


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    #504
    pjproby
    Registered Users Posts: 842 ✭✭✭pjproby


    80-year mystery of blackberry bush baby is solved using DNA
    http://dailym.ai/2GGhYT6

    Story from the Daily Mail today about DNA testing.


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    #505
    pinkypinky
    Moderators, Society & Culture Moderators Posts: 6,616 Mod ✭✭✭✭pinkypinky


    DamoRed - you can start with our very own sticky on DNA!

    Genealogy Forum Mod



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    #506
    Ipso
    Closed Accounts Posts: 5,995 ✭✭✭Ipso


    DamoRed wrote: »
    Given the concerns arising from recent revelations about my paternal grandparents and their children, it seems almost certain the only way to confirm one way or another is by DNA testing. However, as I'm reading the recent pages, I'm seeing terms like 'Y-testing' 'Haplogroup' and I've no idea what any of them mean and subsequently what type of test tells what, or what type of test is best to do.

    For those not familiar, it was said by my cousin, that my paternal grandparents 'raised/adopted' 4 girls, but, that 'as far as he knew' my father and his brother were their natural children. It'd be more comforting to know for certain beyond simple misunderstandings.

    Is there any site I can go to where these and other terms are explained and a recommendation for what test I take? From the simple background given above, it would appear what I need, is a test that determines whether I follow the paternal familial line. With that in mind, what kind of test do I need to do?

    Are you thinking your father and your Uncle were not brothers?
    Assuming the Damo in your name is the Damo we are familiar with, then I take it you are male.

    If you want to determine if these two men were brothers, you could figure it out if the other has a son.
    Both of you could take a Y DNA test, this type of test looks at the YDNA of males and tests the direct male line and will tell you your haplogroup (basically a mutation in the Y DNA which is passed down the male line).
    You inherit your haplogroup from your father, he got his from his father, him from his father and so on going back.
    This test can also estimate how far back your common male ancestor is.
    You and your cousin should have the same haplogroup, as both your father's share the same father.
    To confuse matters, you could also have the same haplogroup if you are not related as there are a few very common haplogroups that dominate in Ireland, so for fine scale testing for recent relatedness you are better of relying on the estimation of how many generations ago the common male ancestor is.


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    #507
    pinkypinky
    Moderators, Society & Culture Moderators Posts: 6,616 Mod ✭✭✭✭pinkypinky


    Testing your Y DNA will not confirm if your grandfather was your grandfather unless you can also test a confirmed son of his too or sibling or paternal cousin.

    You need to test your father and one of the girls and see what the sibling relationship is with an autosomal DNA test. If they are full or half siblings, the amount of centimorgans will be large. See Blaine Bettinger's shared centimorgan chart.

    If the previous generation is not possible, then test yourself and a cousin descending from one of the girls. You should match. If you don't then, someone is not the child of your grandfather.

    Genealogy Forum Mod



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    #508
    DamoRed
    Registered Users Posts: 394 ✭✭DamoRed


    The one thing we must learn from our genealogical pursuits is to guard against assumptions! But yes, I am male.

    It is thought that they are/were natural blood brothers, born naturally of their parents, as opposed to their sibling sisters who are known to have been adopted. I say were, because my father died 25 years ago and assume - that word again - his brother would also be deceased at this point, if not even before him. The difficulty arises in that the other brother emigrated to New Zealand, and apart from his daughter who visited Ireland 40 years ago, it's not known if she has any siblings, male or female. A close-knit bunch, aren't we?


    Pardon my flippancy, but would a centimorgan test determine if I'm a distant cousin of Fr Ted? :D


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    #509
    pinkypinky
    Moderators, Society & Culture Moderators Posts: 6,616 Mod ✭✭✭✭pinkypinky


    You will definitely need to test a descendant of the brother to determine what you want, but it doesn't have to be a male. Autosomal will tell you if you are first cousins, and at that level, it is 100% correct. Best thing to do is test yourself first and then get your detective hat on to find the NZ people. You might find they've already tested.

    Genealogy Forum Mod



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    #510
    cat_r
    Registered Users Posts: 37 ✭cat_r


    Autosomal DNA tests are the tests advertised on TV. Men and women can do the test to find both male and female relations using a kit from Ancestry, Family Tree DNA, MyHeritage or 23andMe. The results will show your matches and by how many centiMorgans you match. Then look at a chart of these numbers (or use an online calculator like this one https://dnapainter.com/tools/sharedcmv4) to see what the likely relationships could be. 
    You mentioned doing male line testing (Y-DNA) - if you want to do that after you've done the autosomal tests, then the best company to use for the autosomal tests is Family Tree DNA (FamilyFinder test) as they can usually use the same sample to do further tests. The other companies don't do comprehensive Y-DNA testing.


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    #511
    sheepintheback
    Registered Users Posts: 42 ✭sheepintheback


    Hey Guys! I am gonna get an ancestry DNA test and i have a query.

    I understand that i get 50% of my mothers DNA and 50% of my fathers DNA, so in other words, my Dad has 50% DNA that was not passed on to me!

    If i use a sample of my dads DNA for the test, does that mean i am more likely to make a match with a cousin on his side?
    However if he does the test, i will get no information on my Mom's side.
    So would it not be best for me to do the test. That way i can find out who I am.

    I cant afford more than 1 :(


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