Dear Patti, I was just looking at my last message to you as below. The following sentence was incorrect: "In this particular case, two people who share 92.5 cMs are likely to be no more distantly related than 1st cousins once removed." The sentence should have instead read as follows: "In this particular case, two people who share 92.5 cMs are likely to be no more closely related than 1st cousins once removed." Sincerely, Tim Janzen -----Original Message----- From: genealogy-dna-bounces@rootsweb.com [mailto:genealogy-dna-bounces@rootsweb.com] On Behalf Of Tim Janzen via Sent: Saturday, November 21, 2015 3:25 PM To: genealogy-dna@rootsweb.com Subject: Re: [DNA] Match metrics help Dear Patti, I agree with Kathy Johnston's comments. The way I approach situations where there are matching segments on the X chromosome as well as matching autosomal segments is to first put aside the matching segments on the X chromosome and focus first on the total number of shared cMs. In this particular case, two people who share 92.5 cMs are likely to be no more distantly related than 1st cousins once removed. If there were no endogamy involved then we would expect the most likely relationship to be 3rd cousins. Since endogamy is involved a relationship as distant as 4th or 5th cousins is possible. If you are using Family Finder matching HIR data then I would suggest you delete all HIRs under 5 cMs before you start trying to predict the genealogical relationship. Blaine Bettinger's chart at http://www.thegeneticgenealogist.com/2015/05/29/visualizing-data-from-the-sh ared-cm-project may also be of help to you. I use the X chromosome data to help determine which ancestral lines the genealogical relationship may have been on. When you are in doubt about the genealogical relationship, testing more relatives from various lines of descent can help you better estimate the most likely genealogical relationship. I average the results for the people at each generational level, as I did in this project: http://blog.23andme.com/ancestry/who-were-the-parents-of-jacob-youngman. Sincerely, Tim Janzen
Thanks Tim. I had caught that, but appreciate the correction. I also appreciate the article you shared on Jacob Youngman. A fine example of methodology in tackling all the variables to find a solution. I can also appreciate the half siblings in the case as well. Thank you again very much. Regards, Patti -----Original Message----- From: genealogy-dna-bounces@rootsweb.com [mailto:genealogy-dna-bounces@rootsweb.com] On Behalf Of Tim Janzen via Sent: Saturday, November 21, 2015 5:08 PM To: genealogy-dna@rootsweb.com Subject: Re: [DNA] Match metrics help Dear Patti, I was just looking at my last message to you as below. The following sentence was incorrect: "In this particular case, two people who share 92.5 cMs are likely to be no more distantly related than 1st cousins once removed." The sentence should have instead read as follows: "In this particular case, two people who share 92.5 cMs are likely to be no more closely related than 1st cousins once removed." Sincerely, Tim Janzen -----Original Message----- From: genealogy-dna-bounces@rootsweb.com [mailto:genealogy-dna-bounces@rootsweb.com] On Behalf Of Tim Janzen via Sent: Saturday, November 21, 2015 3:25 PM To: genealogy-dna@rootsweb.com Subject: Re: [DNA] Match metrics help Dear Patti, I agree with Kathy Johnston's comments. The way I approach situations where there are matching segments on the X chromosome as well as matching autosomal segments is to first put aside the matching segments on the X chromosome and focus first on the total number of shared cMs. In this particular case, two people who share 92.5 cMs are likely to be no more distantly related than 1st cousins once removed. If there were no endogamy involved then we would expect the most likely relationship to be 3rd cousins. Since endogamy is involved a relationship as distant as 4th or 5th cousins is possible. If you are using Family Finder matching HIR data then I would suggest you delete all HIRs under 5 cMs before you start trying to predict the genealogical relationship. Blaine Bettinger's chart at http://www.thegeneticgenealogist.com/2015/05/29/visualizing-data-from-the-sh ared-cm-project may also be of help to you. I use the X chromosome data to help determine which ancestral lines the genealogical relationship may have been on. When you are in doubt about the genealogical relationship, testing more relatives from various lines of descent can help you better estimate the most likely genealogical relationship. I average the results for the people at each generational level, as I did in this project: http://blog.23andme.com/ancestry/who-were-the-parents-of-jacob-youngman. Sincerely, Tim Janzen ------------------------------- 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