Hi,Dick, That is good news however are you saying that more than 6 generations is accurate in EVERY case? This is all good stuff! and the interest aroused among the later joining list members is very encouraging. At the moment I am trying to contact my Chase site owner but so far no success. I came across his "Blog" in which he states he hopes to open another 50!!!!?? genealogy sites. Surnameweb give him as the contact but so far no joy ----- Original Message ----- From: "Richard Chase" <rachase@triad.rr.com> To: <chase@rootsweb.com> Sent: Friday, August 25, 2006 10:58 PM Subject: Re: [CHASE] DNA test > Keith -- The Y chromosome dna does tend to mutate over a number of > generations, that is, the value of an individual allele (or marker) can > change between two generations. But I think that the test results that we > have for the CHASE individuals who have taken the 25 marker test rather > clearly show that 6 generations is not a limit for valid comparisons. In > both the Aquila and William lines there are very close matches for > individuals who are 10 generations removed from the known common ancestor. > > Dick Chase > > -----Original Message----- > From: chase-bounces@rootsweb.com [mailto:chase-bounces@rootsweb.com] On > Behalf Of Keith Hume > Sent: Friday, August 25, 2006 3:05 PM > To: chase@rootsweb.com > Subject: Re: [CHASE] DNA test > > Hi,Charlie, > This gets more and more intriguing!. > Am I right in thinking that her connections are all on the female Chase > line > > as I understand that is the only way this test can be relavent. > Also about 18 months ago I was looking at some articles on DNA testing and > read that from 6 generations back , using the "male" test you could not > rely > > on the data due to minor mutations. > Do you or anyone on the list know anything about this? > Keith Hume > ----- Original Message ----- > From: <ChaseDNAteam@aol.com> > To: <chase@rootsweb.com> > Sent: Friday, August 25, 2006 4:24 AM > Subject: Re: [CHASE] DNA test > > >> To: Chase Group >> >> Today we had one of the test takers, who matches the William Chase >> descendants, upgrade from 12 to 37 markers. As we build a base at 37 >> markers we might >> start seeing a difference in the results. If this happens, it could show >> a >> difference for the children of William or at some generation. We won't >> know >> until we get some results back. This is also an idea for the Aquila >> descendants. >> >> The basic 12 marker test shows if you have a common ancestor with those >> with >> proven research. For some, this might be all you need. For those of you >> who >> are still trying to prove your research, this is an additional tool. >> (Upgrades: 12 to 25 or 25-37 = $49; 12 to 37 =$99) >> >> We also have, I think, our first Chase female doing the mtDNA test >> ($129). > >> I >> admit, I know very little about the mtDNA test and how to read the >> results. I >> guess we will learn together. >> >> Charlie Scott >> >> ------------------------------- >> To unsubscribe from the list, please send an email to >> CHASE-request@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 > CHASE-request@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 > CHASE-request@rootsweb.com with the word 'unsubscribe' without the quotes > in the subject and the body of the message

Keith -- I may have inadvertently implied that, but the correct answer is "no". In fact, since we are dealing with the probabilities associated with the random mutations of markers over time (number of generations), there is no "certainty" in the comparison of any test results from two or more individuals. The number of markers there are to compare (i.e., 12 -- 25 -- 37 -- etc.) and the number of matches, and genetic "distance" of non-matches are the basis for the calculated probability of a common ancestor with each generation back from the one of the individuals tested. And actually, the probability of a common ancestor actually increases the further back you go (greater number of generations since the common ancestor). This is because the more intervening generations there between the common ancestor and the present, the greater the likelihood there is that there will have been mutations in markers resulting in the present day non-matches in the tests of the two individuals we are comparing. Dick -----Original Message----- From: chase-bounces@rootsweb.com [mailto:chase-bounces@rootsweb.com] On Behalf Of Keith Hume Sent: Saturday, August 26, 2006 5:16 AM To: chase@rootsweb.com Subject: Re: [CHASE] DNA test Hi,Dick, That is good news however are you saying that more than 6 generations is accurate in EVERY case?

Thanks,Dick, That does clarify the issue Keith ----- Original Message ----- From: "Richard Chase" <rachase@triad.rr.com> To: <chase@rootsweb.com> Sent: Saturday, August 26, 2006 7:49 PM Subject: Re: [CHASE] DNA test > Keith -- I may have inadvertently implied that, but the correct answer is > "no". In fact, since we are dealing with the probabilities associated > with > the random mutations of markers over time (number of generations), there > is > no "certainty" in the comparison of any test results from two or more > individuals. The number of markers there are to compare (i.e., 12 -- 25 -- > 37 -- etc.) and the number of matches, and genetic "distance" of > non-matches > are the basis for the calculated probability of a common ancestor with > each > generation back from the one of the individuals tested. And actually, the > probability of a common ancestor actually increases the further back you > go > (greater number of generations since the common ancestor). This is because > the more intervening generations there between the common ancestor and the > present, the greater the likelihood there is that there will have been > mutations in markers resulting in the present day non-matches in the tests > of the two individuals we are comparing. > > > > Dick > > -----Original Message----- > From: chase-bounces@rootsweb.com [mailto:chase-bounces@rootsweb.com] On > Behalf Of Keith Hume > Sent: Saturday, August 26, 2006 5:16 AM > To: chase@rootsweb.com > Subject: Re: [CHASE] DNA test > > > > Hi,Dick, > > That is good news however are you saying that more than 6 generations is > > accurate in EVERY case? > > > > > ------------------------------- > To unsubscribe from the list, please send an email to > CHASE-request@rootsweb.com with the word 'unsubscribe' without the quotes > in the subject and the body of the message