I did what was suggested and asked James and Phil (my mother's matches) to send me their downloaded results for chromosome 20 where they share overlapping DNA with my mother and her sister. James and Phil are ICW each other. Phil shows the following segment data for James: 42994328 51684283 16.90 2884 But James does not show Phil in his chromosome browser download on chromosome 20, or anywhere in his file (he sent me the whole file). James also sent me the downloaded match file listing his matches, their contact info and amount of shared DNA etc. and Phil IS on the list with 47.02 total cM and 16.9 longest segment. These files were downloaded by James and Phil using dnagedcom.com. Everyone mentioned here tested at FTDNA. How could Phil be missing from James's chromosome browser download? -----Original Message----- From: autosomal-dna-bounces@rootsweb.com [mailto:autosomal-dna-bounces@rootsweb.com] On Behalf Of Tim Janzen Sent: Sunday, September 29, 2013 10:43 AM To: autosomal-dna@rootsweb.com Subject: Re: [AUTOSOMAL-DNA] ICW - inconsistencies 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 ______________________________ 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, This is a little bit perplexing. The only reason I can think of right now that Phil wouldn't be appearing in James' chromosome browser download is one or more genotyping errors in Phil's and or James' data that is preventing FTDNA from calling this a match in James' chromosome browser but not in his match list. You could look at their raw data files to see if there are any mismatches in this relatively long run of 2884 SNPs in an HIR. If you don't find any mismatches in the SNP data then I would suggest you contact FTDNA to let them know that there is a problem here and suggest that they look into why Phil is missing from James' chromosome browser download. Either way, it would be reasonable to point this situation out to FTDNA, because something isn't right here. Sincerely, Tim Janzen -----Original Message----- From: autosomal-dna-bounces@rootsweb.com [mailto:autosomal-dna-bounces@rootsweb.com] On Behalf Of Barton Lewis Sent: Thursday, October 03, 2013 7:25 PM To: autosomal-dna@rootsweb.com Subject: Re: [AUTOSOMAL-DNA] ICW - inconsistencies I did what was suggested and asked James and Phil (my mother's matches) to send me their downloaded results for chromosome 20 where they share overlapping DNA with my mother and her sister. James and Phil are ICW each other. Phil shows the following segment data for James: 42994328 51684283 16.90 2884 But James does not show Phil in his chromosome browser download on chromosome 20, or anywhere in his file (he sent me the whole file). James also sent me the downloaded match file listing his matches, their contact info and amount of shared DNA etc. and Phil IS on the list with 47.02 total cM and 16.9 longest segment. These files were downloaded by James and Phil using dnagedcom.com. Everyone mentioned here tested at FTDNA. How could Phil be missing from James's chromosome browser download?