Mailing List:2006-09-29 02, Re: need clarification DNA....., by Tim Doyle

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Mailing List Archives > 2006-09-29 02, Re: need clarification DNA....., by Tim Doyle

From: "Tim Doyle" <tim -at- greenscourt.com> Subject: Re: [WHITNEY] need clarification DNA..... Date: Fri, 29 Sep 2006 10:17:12 -0500 In-Reply-To: <11672AE4-AD03-4F9A-AB7E-FFECF323D947@mediacombb.net> Eleanore: Short answer: Your son cannot participate in the Whitney DNA Study - only males with a complete male lineage back to a Whitney would produce valid results. Long Answer: When a child is conceived, he or she receives 22 chromosomes from their mother and 22 chromosomes from their father. These 22 pairs of chromosomes get shuffled together randomly for each person, so they don't easily help in determining relationships to other people and are not used for genealogical studies. In addition, the baby also receives mitochondrial DNA from their mother. The mitochondrial DNA (which comes from the person's mother, and from her mother, etc. all the way back through time) can be used to determine how closely people are related through their maternal lines. Because surnames typically follow the male line, this type of test isn't useful for the needs of the Whitney study. The child also receives an "X" chromosome from their mother, and either an "X" chromosome (baby girl) or a "Y" chromosome (baby boy) from their father. Since the "Y" chromosome comes ONLY from the father (and from his father, and from his father, etc. all the way back through time), it can be used to determine how closely two men are related to each other. This is what the Whitney DNA Study is examining and why only direct male descendants can be tested. Keep in mind that genealogical studies such as ours do not look at the entire DNA of a person. They look for specific regions of 'junk DNA' which researchers have identified that repeat a certain pattern over and over. These repeats can sometimes get copied wrong when a baby is conceived, so that the baby has one more or one less repeats than the father. It is the number of repeats at these specific sites that the genealogical tests look at. For example, it appears that all descendants of John Whitney have 30 repeats at the site known to researchers at DYS389-2, while the descendants of Henry Whitney and Samuel Whitney have 29 repeats there. Looking at multiple repeat sites (the tests cover 12, 25, 37, or 67 repeat locations) allows us to see more of these patterns. We then use statistics to determine the probability that two people are related within a certain number of generations. I hope this helps, though looking back it does look a bit complicated. Thanks! Tim -----Original Message----- From: whitney-bounces -at- rootsweb.com -at- rootsweb.com On Behalf Of Jonathan Whitney Sent: Friday, September 29, 2006 9:30 AM To: whitney -at- rootsweb.com Subject: Re: [WHITNEY] need clarification DNA..... Eleanore, I believe you and I have had some brief correspondence in the past. You are descended from Corporal Joseph Whitney and his first wife and I am descended from Corporal Joseph Whitney and his second wife Anna (Palmer?). I have had my DNA tested at the 12-marker level and am going to be doing the 67-marker test. I'm not sure I understand the DNA process completely, but I don't think your son's DNA can be used to check the Whitney connection. However, I've always wondered if there wouldn't be a perfect match on part of it that could be used to determine a relationship. In other words,I would think that your son and I, or my son and yours, would have some markers that are essentially the same that would prove a relationship. Maybe if doesn't work that way, or maybe that's something this testing can show in the future as the various lines are developed. Do you know of any male Whitneys who are descended from Samuel? They would be able to have their DNA taken and prove the line. And, do you know anything about Joseph's second wife, Anna? She is one of my "brick walls." Jon Whitney On Sep 28, 2006, at 6:43 PM, Eleanore Dilello wrote: > Hi everyone: > > > > Thank you all for all the info you have been bringing to the > Whitney line. > > > > About the DNA testing: I am not quite clear on something.. > > > > I am descended from the original John who came here..my line is: > > > > John 1, John II, Benjamin, Daniel, Joshua, Mary who married the > 1st Samuel > son of Joseph. And > > > > John I, John II, John III, Timothy, Joseph, Samuel, William > Bartholomew, > Samuel, Isaac, Male Whitneys stop here, Isaac's daugher Victoria > Whitney, > her son, my grandfather, their daughter, my mother, and me .. and > > > > > > Is there any DNA testing that could be done on my son??? Or does it > have to > be completely Whitney male lines continuous..??? And if this is so, > > Where can I find out the DNA's of anyone that would give me > information > about one of my ancestors.I guess what I am asking is this: > > > > Does anyone have a DNA connection to any of the following and if so > that > would give me some clue for myself.or confirm some connections. > > > > Capt Joshua Whitney b. 03 Apr 1737. d. Worcester > > Ensign Daniel Whitney b. 17 Jul 1700 Watertown > > Benjamin Whitney son of John II..b. 28 Jun 1660 Watertown > > Samuel Whitney b. 07 Aug 1758 Newton, MA > > Corporal Joseph Whitney b. 21 Feb 1715/16 Roxbury MA moved to > Gilsum NH > > Timothy Whitney b. 16 Apr 1678 Roxbury son of John III > > > > > > Best > > Eleanore Dilello > > > > > > > > > > > ------------------------------- > To unsubscribe from the list, please send an email to WHITNEY- > request -at- rootsweb.com with the word 'unsubscribe' without the quotes > in the subject and the body of the message > ------------------------------- To unsubscribe from the list, please send an email to WHITNEY-request -at- rootsweb.com with the word 'unsubscribe' without the quotes in the subject and the body of the message


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