The Library

Interrelated families
In the Family Tree DNA database, if you allow it, your DNA will be compared to other's
throughout the world who have tested, now numbering over 50,000. Some of our participants
have matched up with other's who have different names.

What does a non-Sinclair match mean?
If a participant matches a name that's different than ours, it can mean only one of 2 things -

1. A non-paternity event - Perhaps an adoption occurred. The mortality rate in bygone days
was certainly higher than it is today. Perhaps a nearby family got wiped out in the "Starving Times"
of the 1600's. There is another non-paternity event that I won't go into much here except to say
that given the rate it seems to happen these days, I suspect the same was always a temptation
in times of yore.

2. It could be a result of the fact that so many of our group fall into the Atlantic Modal Haplotype.
The Atlantic Modal Haplotype, as the name may suggest is a haplotype very common on the
western coast of Europe.Since the majority of men of European descent belong to R1b, this
group has the highest risk of so called "accidental" matches - matches due to an accidental
convergence of long separated R1b lines, rather than due to recent kinship.
Most different surname matches among R1b's are probably of this variety. In general, the
closer a haplotype is to the R1b modal haplotype, the more of these accidental matches that
will be seen.

These markers are the definition of the Atlantic Modal Haplotype. Most of us in the project fall
within these markers.

There is a gradient of increasing frequency of the above haplotype from
eastern Europe across to western Europe which follows closely the distribution pattern
of Haplogroup R1b.

If you are of European descent, the worldwide prevalence of the haplotypes above should
make it very clear that taking a test with too few markers - less than the 25 marker test - can
lead to a great deal of confusion.

source - http://www.dnaheritage.com/masterclass4.asp






 

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