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  #1  
Old 25th January 2017, 09:55 PM
stennor stennor is offline
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Join Date: Apr 2013
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interpreting chromosome browser results

I invite any insight on something I'm observing in my Family Finder data. What conclusions, if any, would you draw from the following evidence?

I share a portion of chromosome #15 with five of my matches. (The shared segments aren't identical, but the FTDNA tutorial tells me that even a precisely identical correspondence is no more meaningful than an approximate overlap.) All five matches are designated probable 2nd-4th cousins, and I share 52-68 cM with longest blocks ranging from 18 to 37 cM, and those are the overlapping blocks on chromosome #15.

The branch of my family tree that appears to be relevant is the one involving several generations descended from New England colonists who started arriving in the 1600s. One of my five matches is a 9th cousin descended from one of those New England ancestors, and another of the five is probably a cousin of a similar nature. I don't see a paper connection with the third match (but she does have some New England ancestors), and the fourth and fifth haven't posted trees.

So--six of us sharing a block of the same chromosome. Does it mean anything?
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  #2  
Old 25th January 2017, 10:21 PM
MoberlyDrake MoberlyDrake is offline
mtDNA: T2b5 | Y-DNA: J-M172
 
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I'd be interested in knowing your start and end points. My mother and her niece and nephew have a region on chromosome 15 from about 25,000,000 to 55,000,000 where several matches share segments between 25 and 37 cM long. They are among our closest matches, but I've never found any common ancestor among them (the few that have info and respond to email).
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  #3  
Old 26th January 2017, 09:33 PM
stennor stennor is offline
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chromosome segments

Thanks for your reply. The overlapping segments aren't identical; the start points range from 51191186 to 56556114, and the end points range from 66415197 to 84168648. I'm referring to six people (one more than I indicated in my original post) with long blocks ranging from 18.09 to 36.69 cM. I have five other matches with shorter segments that also fall within the range that the six cover.

I have another ten matches whose pieces of chromosome #15 fall within the range you described, but the longest is 14.21 cM and most are less than 10 cM.
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  #4  
Old 26th January 2017, 10:53 PM
MoberlyDrake MoberlyDrake is offline
mtDNA: T2b5 | Y-DNA: J-M172
 
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Have you tried putting all 6 on the Matrix Tool to see if they match each other?
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  #5  
Old 27th January 2017, 04:10 PM
stennor stennor is offline
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Quote:
Originally Posted by MoberlyDrake View Post
Have you tried putting all 6 on the Matrix Tool to see if they match each other?
Yes, all of us match on the matrix tool.
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  #6  
Old 24th February 2018, 01:29 PM
johnh123 johnh123 is offline
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From what I understand then yes, you are all related likely along the line that you have already identified.
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