RESULTS PATRIARCHS GENETIC DISTANCE DISCUSSION PERSONAL PEDIGREES SUBMITTED

TERRY FAMILY HISTORIAN TERRY GENFORUM TARRY GENFORUM TERRY GROUPS

TERRY LINEAGE GROUP 2 - Discussion

Haplogroup I

(This is of course a work in progress)

Individuals in this group who have DNA tested as of April 09, 2007: T-6, T-27.

John Self Terry, b. c1780 Bedford Co., VA m. Frances Gaddy - Dewayne Terry [dterry2281 AT comcast.net] T-6

This Terry family had descendants in Virginia, Kentucky and migrated to Arkansas, Texas and Illinois. It is not known how T-6 and T-27 are related; however, there is a perfect 37/37 marker match.
Note by Mike Terry: The Gaddy/Gaddie family has a presence in Bedford County, Virginia. However, there are no records indicating John Self Terry was in this area. In the Terry Family Historian for September 1986, page 136, there is a query by William L. Strickland of Little Rock, Arkansas which indicates John married Francis Gaddy in 1798 in Madison County, Kentucky. Present day Madison County, Kentucky was formed in 1785 from Lincoln County while it was still a part of Virginia. Actual marriages records indicate May 28, 1797 in Madison County, Kentucky.

John Self Terry, b 1765 VA. m Frances "Fanny" Gaddy/Gaddie - SKM [y2k AT kcnet.com] Timothy Moore has a large site dedicated to this family at this link Descendants of John Self Terry.

Andrew Terry, bc 1805, Madison County, IL, d 28 Jun 1836 St. Clair County, IL, m: Nancy Green STICE - Don Terry [dlterry47 AT yahoo.com] T-27
Descendants of this Terry family are found in St. Clair County, IL and later in Utah and Idaho. It is not known how T-6 and T-27 are related. Andrew and John Self Terry are a genetic distance of 0.

In comparing 37 markers, the probability that T-6 and T-27 shared a common ancestor within the last....
4 generations	8 generations	12 generations	16 generations	20 generations	24 generations
83.49%	97.28%	99.55%	99.93%	99.99%	100%
*The above numbers are based exclusively on the comparison of their Y-DNA results, which show no mismatches. I believe a generation is considered to be 25 years.

The FTDNATiP results are based on the mutation rate study presented during the 1st International Conference on Genetic Genealogy, on Oct. 30, 2004. The above probabilities take into consideration the mutation rates for each individual marker being compared.

Since each marker has a different mutation rate, identical Genetic Distances will not necessarily yield the same probabilities. In other words, even though T-10 has a Genetic Distance of 1 from T-2, someone else with the same Genetic Distance may have different probabilities, because the distance of 1 was prompted by mutations in different markers, with different mutation rates.