In the image above the direction of
the red line connecting the various markers, creates a sequential
classification of R1b1c, and the direction the red line takes is
determined by
SNP (Single Nucleotide Polymorphism)
results.
For this haplogroup, the
classification begins at marker M207 (R) and stops when all the
known sequential pairs have returned results (Positive, Negative or
Null). In my case the classification has a temporary stop
at M269 (c). It stops at M269 because the testing hasn't been
completed on all of the remaining markers shown to the right of
M269.
For example, markers above the
red line location in black have all returned a negative result.
Markers above the red line in light-green haven't returned a result
yet. Markers below the red line are newly added markers to
this haplogroup listing and are not in the scheduled test currently
being performed. New markers will get tested to improve
resolution when one or more individuals
in the growing
searchable databases identifies
individuals as being a reasonably close relative.
While no geographical
or ethnic classification can be excluded from a haplogroup,
geographical areas usually have a dominant or high percentage of a
few haplogroup classifications. Other haplogroups in that area
may have no representation, or only a very small percentage of other
haplogroups. This knowledge of where a haplogroup is dominant
can help a genealogist focus their search efforts when trying to
extend a familial line.
Haplogroups can also
reduce the number of people an individual compares their data record
against when looking for close genetic matches.
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