When an immediate family member[parent/sibling] tests with another immediate family member it would be expected that they would match on all chromosomes. How distant does the relationship need to become before it is reduced to a single chromosome so that you know that number chromosome matches to a particular branch on your tree? Karen

It is possible for siblings to have no match on a specific chromosome. Discounting the short segments reported by FTDNA (which have a high probability of being pseudo-segments), 4th cousins have about a 50-50 chance of sharing a segment. Some known 4th cousins might still share two or (rarely) even more segments, but the probability favors zero or one matching segment at that level. Ann On Wed, Nov 2, 2011 at 1:25 AM, Karen Hodges <[email protected]> wrote: > When an immediate family member[parent/sibling] tests with another > immediate family member it would be expected that they would match on > all chromosomes. > > How distant does the relationship need to become before it is reduced > to a single chromosome so that you know that number chromosome matches > to a particular branch on your tree? > > Karen > > ------------------------------- > To unsubscribe from the list, please send an email to > [email protected] with the word 'unsubscribe' without > the quotes in the subject and the body of the message >