TMRCA Case Studies

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Frank Hodge Frank Hodge
May 2 @ 1:02pm
FGC5494 , L23 Haldanes Rule applies ....hybrids .... Devon / Dorset England few viable males, and many viable female lines explains Dorset Giant and Sheila née gaa..... sacred feminine..... also hybrids hearing problems, 2nd toe longer, thin enamel on teeth, larger occipital skull region, hybrid vigor....low testosterone /sperm count...also genetic inheritance increased longevity.... ... having difficulty finding male lines.......the SLEEPER must AWAKEN........
Robin Spencer Robin Spencer
September 25 @ 4:40pm
Well, it's been almost two years since I posted here, and though this site is very quiet I thought you might be interested in an update on STR tMRCA analysis. The chart above is from In that and other reports at the same site you'll find the theory and results of STR analysis that, to my mind, makes this a completely understood problem. Each of the datasets above is derived from all of the pairwise tMRCAs for all men (Y67-Y111 for accuracy) in the noted datasets (surname or haplogroup). Theory and data agree on the fitting of these to lognormal distributions, which very nicely separates the random error (the Poisson nature of STR mutations, expressed as the width of the curves) from any systematic error (in mutation rate, expressed as the left-right position of the curves). The median group tMRCAs here are already quite accurate and become moreso if there are a couple of historically known points in the cohort -- in this case Spencer and L226. We can do relative dating (i.e. between datasets) with single-generation precision. See the link for more details.
Mitchell Crow Mitchell Crow
July 19, 2019 @ 5:50pm
1 Comment
Mitchell Crow
July 19, 2019 @ 6:09pm
William Crow(e) and John Standish jointly held a lease of two years on the Isle Of Man in the year '32 Queen Elizabeth'. Standish's are recorded as 'Clerks' of sir Wm Crow(e) vicar general and Archdeacon's official, 'IOM'.
Mitchell Crow
July 19, 2019 @ 6:11pm
John and William Crow)e) are recorded at Plimoth/Plymouth colony with Standish et al, for men ordered/permitted to bear arms in defense of the colonies.
Mitchell Crow
July 19, 2019 @ 6:14pm
With the longstanding 'competition' for 'who owns Miles Standish ( Isle Of Man or England), these and additional historical documents and information in my possession may help to answer some of the questions as to where Miles Standish is originally 'from'. I have studied the matter 'extensively' due to discovering the familial relationships. Sharing for researchers in case of interest.
Mitchell Crow
July 19, 2019 @ 6:20pm
"The first mention of the name of Yarmouth, as applied to this township, is found in the court record of January, 1639, in connection with the grant to Thacher, Howes and Crow." from, 'History of Old Yarmouth', 1884
Richard Greer Richard Greer
May 22, 2019 @ 12:13pm
I am kit# B331207, Terminal SNP R1b-BY73152 and I am currently ungrouped because my immigrant does not have a contemporaneously recorded birthdate and no actual parents have been truthfully recorded from Scotland. However, I am just downstream from from R1b-FGC4125 (Grierson and Millikan) and it is anecdotally evident that his parents were Griersons. It should be noted that any Greer who has the STR DYS444=13 is most likely Grierson and should not be in a Macgregor surname group. Grierson was not descended from Macgregor as early genealogists thought before the advent of DNA conclusively proved them wrong.
Garth Graham Garth Graham
March 26, 2019 @ 8:41am
James Kane
March 26, 2019 @ 6:06pm
Thanks, Garth. For a visual of what's different, I present 2 coverage histograms. The green color represents spanning regions with at least for well aligned reads. The red color represents spanning regions with four reads that generally fail the alignment quality metrics needed to make accurate calls. Black indicates regions where the reference itself is incomplete, so calls are possible. Big Y (500) - 9,266,580 callable bp Big Y 700 - 14,836,277 callable bp What does this mean? You have a chance to discover an additional SNP for every two in your current Big Y and have essentially the full known Y chromosome covered. This could help out clusters like S1121's Huey/Caldwell group who have thus far not discovered differentiating mutations. There are no guarantees though. Will you need to upgrade again soon? This is not the best possible solution though as I suspect 16 million callable base pair are possible with 150 bp reads based on what I see in academic WGS samples. However, this is really splitting hairs. This should be the last upgrade you will need until the reads get longer, you are interested in WGS sequencing because price is compelling, or much larger sections of the MSR are defined in future human reference builds. Should you upgrade? In my opinion this upgrade is not necessary, if you have remaining private variants. Check your kit on to see what the list looks like. It would be more effective use of resources to test a 3rd to 4th cousin assuming you haven't done so already. Keep in mind this is also likely the best price you will see on this upgrade ever as an introductory offer. Let me know, if there are questions.
Garth Graham
March 27, 2019 @ 2:01pm
I have upgraded both myself and my uncle Michael Graham to Big Y 700 and I'm about to do the same for one of my other Graham matches (Ronald Graham) who is pretty closely related but we can't yet figure out how he's related. My other Graham match who more closely seems to be related to Ronald (Ken Graham) has already bought his upgrade, so all 4 of us Graham's will soon be equal at big Y 700. I have no unnamed variants left after I did Big Y 500 on myself and my uncle. My uncle has 2 left. Should be interesting to see what this uncovers.
Allan Scott Allan Scott
December 30, 2018 @ 12:02pm
Names have been erased in image Bill Wood Has a Good Method Ages are Close
James Kane James Kane
January 6, 2018 @ 11:05am
If you have had your Big Y updated to version 2 or are just receiving results for the first time, please make sure to add the new VCF and BED archive to the Y-DNA Warehouse. This archive is now the principle gateway to adding your kit to as well as my own analysis. I recommend using the "Shared Link Submissions" version of the process over direct uploads. Those of you who are not under R1b may also want to consider adding the results to the warehouse. The infrastructure in the works behind the scenes may result in a broader community tree concept.
Margaret Clary
November 9, 2018 @ 8:01pm
I am not well versed in what these acronyms mean or what DNA tests or archives are available to join. But I want to add my DNA results to everything available. Is there a page where I can learn, and join? I had my DNA tests done through Family Tree DNA and have uploaded my Gedcom. Any help would be appreciated.
Ronald Howie
November 10, 2018 @ 2:13pm
I have found that the DNA Newbie discussion group on yahoo has been a great help to me over the last few years. They have a member that offers a free online DNA guide that has helped me.
Garth Graham Garth Graham
James Kane James Kane
June 3, 2018 @ 6:53am
Big Y testers: If you have not yet shared your BAM with the project at anytime, the old submission tool is still available at the site hosting the Y-DNA Warehouse. The submission form contains two check boxes. The first enrolls you in the same Data Policy as the Y-DNA Warehouse. The second allows a gVCF of your BAM to be uploaded into the shared part of the repository. The actual BAMs are kept securely off-line. If you would like a copy of the gVCF after it is created, send me a note via email. The files can be anywhere from 25MB for a Big Y to 150MB for a WGS test. These files only contain calls assigned to the Y chromosome on the reference human genome they are aligned with.
Jeanne Braddy Jeanne Braddy has a question!
April 10, 2018 @ 9:39pm
How does someone add a surname that isn't on the list?
Garth Graham
April 10, 2018 @ 10:06pm
The admins have to do that.
Ronald Howie
April 11, 2018 @ 5:11pm
Which one?
Ronald Howie
May 13, 2018 @ 10:36am
Surnames have to be added in a certain format. Sometimes the hyphenated version doesn't work right or the ones with a dot. There are times that I will go ahead and add both the married and the maiden name to the list keeping it marked right on my working list.