Chart 6 - DNA Profiles - The JNC Cluster

The JNC cluster is named as such because jrc reports a John Nicolas Coffman as progenitor.

JNC -- y-DNA Test results - Kauffman/Coffman Surname Project
Kit #	Progenitor	Haplo group	12-marker match												25-marker match													37-marker, 36/37 match
N4163 jrc	John Nicolas Coffman, 1740, Virginia	R1b1	12	24	14	11	11	15	13	12	12	13	13	30	19	9	9	11	11	25	15	20	29	15	15	17	18	10	11	19	23	16	14	17	17	36	38	11	12
29362 wbm	?	R1b1	12	24	14	11	11	15	13	12	12	13	13	30	19	9	9	11	11	25	15	20	29	15	15	17	18	10	11	19	23	16	14	17	17	37	38	11	12
89716 wsc	?	R1b1	12	24	14	11	11	15	13	12	12	13	13	30	Not tested beyond 12
105172 ckk	?	R1b1	12	24	14	11	11	15	13	12	12	13	13	30	Not tested beyond 12

 

From the FTDNA tutorial: "Genetic distance= 1; very tightly related; explanation -- You share the same surname (or a variant) with another male and you mismatch by only one 'point' at only one marker--a 36/37 match. It's most likely that you matched 24/25 or 25/25 on a previous Y-DNA test and your mismatch will be found within DYS 576, 570, CDYa or CDYb. Very few people achieve this close level of a match. Your mismatch is within the range of most well established surname lineages in Western Europe."

The mis-match is at CDYa, as the tutorial said it would be. But these two men have different surnames "Coffman" and "Maddox" --- a puzzle. (ddk)

---