Hello List,
Final results have returned for Member #160239, the descendant of Charles
CARRICO of Sullivan Co., IN, through his son, Josiah. He is a 67/67 match with
the modal haplotype for the descendants of Peter CARRICO I, 1674 immigrant to
Maryland:
http://dgmweb.net/genealogy/DNA/Carrico/CarricoDNA-results-HgJ2.shtml#M67
This result supports that Charles did not carry the CDYb mutation from 37 to 36,
which means -- if the paper genealogy is correct -- that the mutation has
happened in the family more than once.
http://dgmweb.net/genealogy/DNA/Carrico/NodeChart-PeterCarrico.shtml
CDYa and CDYb are volatile markers, so the mutation happening twice in the same
family is not impossible. There is also another explanation...
That Charles did possess the CDYb mutation, and that #160239 represents a
*backmutation* to the ancestral value. The statistical probability of this
happening is about half that of the above interpretation, but it's still
possible. This interpretation would support Charles having a common ancestor
with the others bearing the mutation (viz., James T., John W., and Thomas
Ignatius I). As with all individual mutations, the question can be answered by
testing cousins, in this case by testing a descendant of a brother of either
Charles G. or Basil Jordan.
Finding the location of a mutation is a process known as "triangulation," and
it
takes three test subjects to accomplish it. We would have three, already, if
the individual who tested only 12 markers would upgrade to 37 markers.
Otherwise, we need to locate a third cousin.
Diana