Hi Emily, Tim and Jim Thank you all for helping to answer my question regarding WIC matches that don't have segment matches to my IBD/genealogy match. Also I think I understand now IBS and what you were saying Emily. IBS can be coincidental as a result of endogamous populations. IBS can also occur when both parents have the same Alleles eg Both parents have AT, their child inherits AT it is impossible to tell which allele came from which parent. A HIR segment can be mainly made up of paternal DNA but might have some maternal DNA intersorted leading to a false positive. The segment is artificially longer [showing it as a match] as a result of the maternal DNA being read. It is impossible to tell this has happened by looking at the Alleles. It can only be ruled out by a genealogy match [IBD] which show no triangulation to the IBS match in the same location. Karen On Sun, Oct 20, 2013 at 1:59 PM, Tim Janzen <tjanzen@comcast.net> wrote: > Dear Karen, > HIR stands for half-identical region. It is an extremely important > term for genetic genealogists interested in autosomal DNA to understand > well. Because I couldn't find a good definition for an HIR 9 months or so > ago, I wrote my own. It is as follows: > > Half-identical region: a region of two paired chromosomes where at least > one of the two alleles from one person's pair of chromosomes matches at > least one of the two alleles from a different person's pair of chromosomes > throughout the entire region. A half-identical region may be either > identical by descent (IBD) or identical by state (IBS). > > Some scientists use IBS to mean an HIR. I think things are simpler and > clearer if you use the term HIR in the right context and use IBS only for > HIRs that are false matches (not the result of a shared common ancestor for > the HIR in question). This topic came up on the RootsWeb DNA list in 2009 > shortly after 23andMe released Relative Finder. Ann Turner's comments at > > http://archiver.rootsweb.ancestry.com/th/read/GENEALOGY-DNA/2009-11/12572588 > 09 are instructive. > Sincerely, > Tim Janzen > > -----Original Message----- > From: autosomal-dna-bounces@rootsweb.com > [mailto:autosomal-dna-bounces@rootsweb.com] On Behalf Of Karen Hodges > Sent: Saturday, October 19, 2013 2:29 PM > To: autosomal-dna@rootsweb.com > Subject: Re: [AUTOSOMAL-DNA] Family finder matches what to make of them > > What is HIR short for please? > > Karen > > > > > ______________________________ > 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 >