I've seen this too intact fully over from at least 4 generations as well. On Thu, Oct 15, 2015 at 7:38 PM, Robert Paine via < genealogy-dna@rootsweb.com> wrote: > You passed your father's X-chromosome to your son with no or minimal > recombination. In my extended family project the X-was passed through the > mother intact about 20 to 25% of the time. My g-granddaughter had one of > her > X-chromosomes pass intact through both her grandmother and her mother. (She > shares a full X-match with her gg-grandmother. > > RPaine > > -----Original Message----- > From: Rita Ruff via > Sent: Thursday, October 15, 2015 3:51 PM > To: GENEALOGY-DNA@rootsweb.com > Subject: [DNA] X-dna: Son shares none with maternal grandmother > > Hi- > I read the previous X Inheritance thread(very interesting) and decided to > check the X match between my son and my mother at 23andme. It was very > surprising to see they have no matching segment at all. At gedmatch, after > lowering the threshold to 1cM-100snps, their largest matching segment on X > was 3.2cM-288snps. Total X match 16.8cMs. Does this seem unusual, and does > that mean my son's X-matches are all from my dad's side? My son and I share > 196.1cM on the X. > Rita > > ------------------------------- > To unsubscribe from the list, please send an email to > GENEALOGY-DNA-request@rootsweb.com with the word 'unsubscribe' without the > quotes in the subject and the body of the message > > > ------------------------------- > To unsubscribe from the list, please send an email to > GENEALOGY-DNA-request@rootsweb.com with the word 'unsubscribe' without > the quotes in the subject and the body of the message > -- Lisa R Franklin RN,BSN Admin, Franklin Y DNA Project http://trackingyourroots.com/FranklinGenetics/ FranklinGenetics@gmail.com http://trackingyourroots.com/DNA (How To presentation (23andme), tips, & helps. *2**3**&**m**e**: **The World's Largest database & coincidentally the ONLY one with all the tools you need for genealogy and DNA!--* http://refer.23andme.com/v2/share/6158544791499756901/4672616e6b6c696e47656e657469637340676d61696c2e636f6d BEST GENETIC GENEALOGY BOOK! http://www.amazon.com/Genetic-Genealogy-Emily-D-Aulicino-ebook/dp/B00HJJWBU2/ref=sr_1_1?ie=UTF8&qid=1391174801&sr=8-1&keywords=Genetic+Genealogy