DNA comparisons

Hi Andrea!  I’ve finished the DNA analysis (THANKS again, for downloading to Gedmatch!). 

 

The next step is to compare that with our known family relationship – which we don’t have!  I have attached the Vosper relationships we know in the Cousins Chart.    I have summarized what I understand of your Vosper lineage from your tree below:

 

George Vosper

          |

William R. Vosper m. Grace Manning

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Richard Vosper m. Elizabeth Hawkey

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Jane Vosper m. John Hurdle  

          |

Mary Ann Hurdle

          |

Rebecca Bussell

          |

Ernest Rice   (Canada)

          |

Gilbert George Rice

          |

Ernest Gilbert Rice

          |

    [Private]

          |

Andrea Rice (Sinclair)

 

That’s at least 8 generations from the closest Vosper. 

 

I don’t see a way to attach your tree to the Cousin Chart.  It’s possible that your tree and mine merge with George Vosper, but I don’t have enough facts to verify that.  A George Vosper from my tree:

https://www.ancestry.com/family-tree/person/tree/47009625/person/24453953948/facts

Could this be the same George Vosper from your tree?  https://www.ancestry.com/family-tree/person/tree/39844266/person/160137296233/facts

 

If so, the common ancestor would be Joseph Vosper who married Lyddia Isbell. 

 

Now, to the DNA:  With each generation, the amount of DNA you’d expect to have in common is reduced by 50%.  That’s 8 generations back for my family, 11 generations back for you.  So, in a best case scenario, we might expect to find .05% to .1% in common.  We have 3,589 cM, so .1% would be about 3.6 cM.  The “best case” would be if there was a “sticky segment” which stuck down through all the generations and was inherited.  Unfortunately, with the process of recombination, accidental matches can occur, which are generally considered to be in the 0-6cM range.  In other words, with small segment matches, like we would expect this many generations back, we can’t say for certain they are inherited (IBD) or accidental (IBS).

 

I’ve run your DNA against the individual tests for our Vosper Cousins, and have summarized on the Cousin Chart below, which shows highlighted those people you’ve had small segment matches with:

 

 

When you look at the individual DNA comparisons below you’ll see that the results include a start location, end location, and a cM length.  Most of the segments do not overlap – with one exception:

 

       Kit         Chr.     Start location      End location     cM

       Carol      9         106,367,615       109,734,883     5.0

       Aus         8             9,131,698         11,389,950     2.2

      Badarby 6         158,877,092       161,491,141     3.8

       Robert    8           13,744,265         16,443,534     2.7

       Jasf         8             9,158,808          11,538,674    2.3

       

The two small segments that Aus and Jasf match you on also overlap each other on Chr. 8, indicating  they MAY be an inherited segment, and thus a positive indicator of common inheritance.  In my (amateur) opinion, it is more likely that it is an inherited commonality than a random commonality.

 

Here are all the individual test results, which were obtained by using the gedmatch one to one comparison tool:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

I want to stress that, while a positive match is a sign of a definite relationship, a negative match is NOT a sign that there is no relationship.  A negative result is a natural occurrence of DNA recombination.

 

The bottom line is that we need to figure out how your family fits into our cousin chart – that is the best indicator of relationship that many generations back.  We need to work on getting George Vosper into the proper slot!

 

I have copied our Vosper Cousins on this email, and have also put a copy of the Vosper Blog.  

 

I’m so glad you’ve found our little group!

 

Cousin Teri