There are only two lasting bequests we give to our children - one is roots, the other wings. -Hodding S.Carter
O'Shields Genealogy and DNA Testing From the O'Shields/O'Sheal DNA Project
Human sex is determined by the X and Y chromosomes. Females have two X chromosomes (one from each parent). Males carry one X chromosome from his mother and a Y chromosome from his father. From generation to generation, the Y chromosome is inherited, basically without alteration, from father to son, to son, and so on. For this reason, DNA testing of the Y chromosome can be a helpful genealogical tool. More information on DNA testing, as it relates to genealogy, may be found at www.familytreedna.com. While an individual's test results may have little meaning on their own, the value of the test results becomes apparent as comparisons are made with the results from other testees. Depending on the number of markers and matches, comparisons will indicate with a certain degree of probability; how long ago a common ancestor existed. This will not give the exact name of the ancestor, only DNA markers or alleles (the numbers). Extensive scientific studies have calculated time intervals to the most recent common ancestor and other conclusions interpreting genetic distance between testees. O'Shields and O'Sheal men across the United States have participated in the O'Shields/O'Sheal DNA Project. Testees bearing the same surname or variants, may join or obtain further information at the following website: http://www.familytreedna.com/project-join-request.aspx?group=OShields&projecttype=S An estate document for John O'Sheal, Revolutionary War Soldier of Spartanburg, S.C. identifies his children, including his son William O'Shields (born ca. 1800-1805) and his younger brother Isaac O'Shields (born ca. 1807-1810). Further documentation establishing that William Pascal O'Shields (married Elizabeth Heaton) is the son of John O'Sheal, RWS is given elsewhere on this site. Information establishing Isaac O'Shields (married Jarvey Nixon), as the son of John O'Sheal, RWS can be found at the following site: http://listsearches.rootsweb.com/th/read/OSHEAL/2007-04/1177796306 Y-DNA testing has been conducted by male descendants of John O'Shields from both of his sons, William Pascal O'Shields and Isaac O'Shields, which have shown to be an exact 67 marker (alleles) match, and this may be seen by comparing kit numbers 122767 and 63978 at the following site: In regards to the above test, the DNA numbers were found to be an exact match, with a genetic distance of 0. Concerning this match, Family Tree DNA states the following: Distance: 0 - Very Tightly Related 67/67 Your perfect match means you share a common male ancestor with a person who shares your surname (or variant). Your relatedness is extremely close with the common ancestor predicted, 50% of the time, in 3 generations or less and with a 90% probability within 5 generations. Very few people achieve this close level of a match. All confidence levels are well within the time frame that surnames were adopted in Western Europe. http://www.familytreedna.com/genetic-distance-markers.aspx?testtype=67 Documentation shows that both men are the great-great-great grandsons of John O'Sheal, Revolutionary War Soldier; one from his son William Pascal and the other from his son Isaac. The exact match, as given scientifically by the DNA test comparison, supports this conclusion.
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