I have a situation where ten people are overlapping on a segment from 21995381-40581772 on chr 8. There is no rhyme or reason as to who is ICW with who in that there are different permutations for many of the matches in terms of who they are ICW, such that I cannot tell who is on one side of the chr and who is on the other. There is uniformity for some of them in terms of who they are ICW, but not for others and certainly not as a whole, so that I cannot neatly assign some of the ten to one side and the others to the other. Does the ICW feature fail to pick up matches at a certain level? The overlapping segments are all either 8.25, 9.78, 9.92, 11.05 or 15.85 cM. Thanks, Barton

That is a good case IMO for using GedMatch. You could quickly see who all matches who, and how much. I was just doing that same thing but on a smaller scale. melissa On Sun, Sep 29, 2013 at 9:24 AM, Barton Lewis <bartonlewis@optonline.net>wrote: > I have a situation where ten people are overlapping on a segment from > 21995381-40581772 on chr 8. There is no rhyme or reason as to who is ICW > with who in that there are different permutations for many of the matches > in > terms of who they are ICW, such that I cannot tell who is on one side of > the > chr and who is on the other. There is uniformity for some of them in terms > of who they are ICW, but not for others and certainly not as a whole, so > that I cannot neatly assign some of the ten to one side and the others to > the other. Does the ICW feature fail to pick up matches at a certain > level? > The overlapping segments are all either 8.25, 9.78, 9.92, 11.05 or 15.85 > cM. > > Thanks, > > Barton > > > ______________________________ > For answers to Frequently Asked Questions about mailing lists, please see: > http://dgmweb.net/MailingListFAQs.html > > > ------------------------------- > To unsubscribe from the list, please send an email to > AUTOSOMAL-DNA-request@rootsweb.com with the word 'unsubscribe' without > the quotes in the subject and the body of the message >

Hi Melissa, thanks for your reply.  But you would have to have all ten of those kits uploaded to gedmatch, which isn't very practical.  But even if you could do that, how is gedmatch different from using the chromosome browser in FTDNA, where you can download all your segment data and see who is matching you where, but not know which side of the chromosome pair (unless you can triangulate or easily determine using ICW)? Thanks, Barton On Sun, Sep 29, 2013 at 12:55 PM, M Robards wrote: > That is a good case IMO for using GedMatch. You could quickly see who > all > matches who, and how much. I was just doing that same thing but on a > smaller scale. > > melissa > > > On Sun, Sep 29, 2013 at 9:24 AM, Barton Lewis wrote: > >> I have a situation where ten people are overlapping on a segment from >> 21995381-40581772 on chr 8. There is no rhyme or reason as to who is >> ICW >> with who in that there are different permutations for many of the >> matches >> in >> terms of who they are ICW, such that I cannot tell who is on one side >> of >> the >> chr and who is on the other. There is uniformity for some of them in >> terms >> of who they are ICW, but not for others and certainly not as a whole, >> so >> that I cannot neatly assign some of the ten to one side and the >> others to >> the other. Does the ICW feature fail to pick up matches at a certain >> level? >> The overlapping segments are all either 8.25, 9.78, 9.92, 11.05 or >> 15.85 >> cM. >> >> Thanks, >> >> Barton >> >> >> ______________________________ >> For answers to Frequently Asked Questions about mailing lists, please >> see: >> http://dgmweb.net/MailingListFAQs.html >> >> >> ------------------------------- >> To unsubscribe from the list, please send an email to >> AUTOSOMAL-DNA-request@rootsweb.com with the word 'unsubscribe' >> without >> the quotes in the subject and the body of the message >> > > > ______________________________ > For answers to Frequently Asked Questions about mailing lists, please > see: > http://dgmweb.net/MailingListFAQs.html > > > ------------------------------- > To unsubscribe from the list, please send an email to > AUTOSOMAL-DNA-request@rootsweb.com with the word 'unsubscribe' without > the quotes in the subject and the body of the message >

Dear Barton, One of the most significant deficiencies in Family Finder is the fact that you can't compare your matches against each other to see which of them match each other. 23andMe allowed their customers to do this over a year ago and it has been a huge help for genetic genealogists who are doing chromosome mapping. FTDNA should follow suit. The best you can do under the circumstances with Family Finder is to ask each of your matches on a specific segment to check their match list to see if the other people who match you on that particular segment also match them. If you have that information then you can assign one group to one chromosome and the other group to the opposite chromosome. There will still likely be some people that you can't assign to one chromosome or the other because they don't match anyone else that you match on that segment. At least some of those matches will be IBS. I agree with Melissa Robards that it would be reasonable to ask all of your Family Finder matches to also upload their data to GEDmatch so you can run comparisons between various matches there. However, some people won't be willing to upload their data to GEDmatch. I frankly don't find the ICW feature in Family Finder very helpful because of the fact that I have already mapped my close relatives' chromosomes using data from first, second and third cousins who have already done Family Finder or have been tested elsewhere. Sincerely, Tim Janzen -----Original Message----- From: autosomal-dna-bounces@rootsweb.com [mailto:autosomal-dna-bounces@rootsweb.com] On Behalf Of Barton Lewis Sent: Sunday, September 29, 2013 9:25 AM To: autosomal-dna@rootsweb.com Subject: [AUTOSOMAL-DNA] ICW - inconsistencies I have a situation where ten people are overlapping on a segment from 21995381-40581772 on chr 8. There is no rhyme or reason as to who is ICW with who in that there are different permutations for many of the matches in terms of who they are ICW, such that I cannot tell who is on one side of the chr and who is on the other. There is uniformity for some of them in terms of who they are ICW, but not for others and certainly not as a whole, so that I cannot neatly assign some of the ten to one side and the others to the other. Does the ICW feature fail to pick up matches at a certain level? The overlapping segments are all either 8.25, 9.78, 9.92, 11.05 or 15.85 cM. Thanks, Barton

Barton ICW doesn't necessarily mean on the same segment - it means on some segment. So when there is confusion, such as you have, you need to ask them if they match each other on this specific segment. Jim - Sent from my iPhone - FaceTime! On Sep 29, 2013, at 12:24 PM, Barton Lewis <bartonlewis@optonline.net> wrote: > I have a situation where ten people are overlapping on a segment from > 21995381-40581772 on chr 8. There is no rhyme or reason as to who is ICW > with who in that there are different permutations for many of the matches in > terms of who they are ICW, such that I cannot tell who is on one side of the > chr and who is on the other. There is uniformity for some of them in terms > of who they are ICW, but not for others and certainly not as a whole, so > that I cannot neatly assign some of the ten to one side and the others to > the other. Does the ICW feature fail to pick up matches at a certain level? > The overlapping segments are all either 8.25, 9.78, 9.92, 11.05 or 15.85 cM. > > Thanks, > > Barton