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For the Corson Cousins newsletter, July 2014
Corson Surname DNA Project
The project currently has 68 participants, 66 of whom have results. The most recent results arrived for Division II.
Participant #38 (surname DeCoursey) recently upgraded his STR results from 48 to 111 markers. The additional 63 markers revealed a mutation on marker DYS 714 (24 instead of 23) that, in addition to the previously identified mutations on DYS 447 and DYS 456, distinguish the DeCoursey family line from other Division II family lines.
From the same Division, Participant #39 (surname Coursen) received results of 7 SNPs "downstream" from his previously identified SNP: "CTS8647". He tested negative (i.e., ancestral) for all 7 SNPs, meaning that Division II remains classified as I-CTS8647 for the moment.
Participant #68, with the surname Coreson, documents descent from progenitor Jeremiah Coreson, born 4 Feb 1812 in Richmond County, New York. Jeremiah moved to Michigan, where his son was born, and his sonís son moved from Michigan to Oregon. We hope that 37-marker STR results of Participant #68 will indicate that Jeremiah Coreson descended from one of the known Divisions.
A "tsunami" of SNP results has arrived from the "Big Y" test (offered by Family Tree DNA) in the past several months. These results have allowed coordinators of genealogical SNP projects to discover how the male lines of individuals in the same haplogroup (genetic group) are related. Jumping on the bandwagon, Participant #1 (me) ordered the "Big Y" test with personal funds and the gracious financial support of the CCFHA (your membership dues at work!) and Division I cousins Bruce Corson and Erica Corson.
Storing DNA for future generations
You yourself may not be interested in the genetic genealogy of your family tree, but your children, grandchildren, or descendants yet unborn may be. While their own DNA will contain some of yours, much of the DNA that you carry from your ancestors may be lost when you die. This is especially true for Y-chromosome DNA, which exists only in the male line, and mitochondrial DNA, which is passed on only in the female line. You may be the last living individual in your extended family to carry the Y-DNA of your male-line progenitor or the mitochondrial DNA of your motherís female line. (As a separate issue, your descendants may also be interested in hereditary medical information that can be gleaned from your DNA.)
Much like leaving written memoirs and family histories for your descendants, you may also wish to consider leaving a DNA sample for them. One optimal way to do so is to take a genetic genealogy test from an existing testing lab, which will store your DNA sample cryogenically for at least 20 years. If DNA testing does not interest you, DNA samples can be taken from toothbrushes, hair, and licked stamps, but DNA that has been carefully collected and stored has a much higher probability of yielding high-quality samples. Both "dry" (Whatman FTA cards) and "wet" storage methods (saliva vials) exist. If obtaining either interests you, please contact me.