Question for the experts... If 6 siblings share a common cousin, degree of which is unknown, amd the range for the shared cMs goes from 24 cMs to 105 cMs shared, can we assume that the highest range is the best estimate of closeness (assuming, of course, that there isn't additional SNPs coming into play from another ancestral line that is bumping up the total)? Four are in the 70-80 cM range. Of course, they would all be related - on paper - to the same degree. Any experience with this, and/or thoughts? Thank you. Mary E Hall Santa Barbara, CA
Mary wrote: > If 6 siblings share a common cousin, degree of which is unknown, amd the > range for the shared cMs goes from 24 cMs to 105 cMs shared, can we assume > that the highest range is the best estimate of closeness No, the best estimate is the mean of the 6, assuming they are full siblings. John Chandler
I disagree with others here and will say that the highest matching cms (if properly triangulated) represents the closeness 100cms is really very large But the longest segment may be a better predictor of closeness than the total -----Original Message----- From: Mary E Hall via <genealogy-dna@rootsweb.com> To: genealogy-dna <genealogy-dna@rootsweb.com> Sent: Fri, Jan 8, 2016 8:59 am Subject: [DNA] Shared cM ranges for siblings Question for the experts... If 6 siblings share a common cousin, degree of which is unknown, amd the range for the shared cMs goes from 24 cMs to 105 cMs shared, can we assume that the highest range is the best estimate of closeness (assuming, of course, that there isn't additional SNPs coming into play from another ancestral line that is bumping up the total)? Four are in the 70-80 cM range. Of course, they would all be related - on paper - to the same degree. Any experience with this, and/or thoughts? Thank you. Mary E Hall Santa Barbara, CA ------------------------------- 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