Comparing Paternal Aunt to her Nieces & Great Niece in Chromosome Browser

I think this is a good illustration of the randomness of DNA.   I'm comparing Me, my sister, and my daughter to my paternal aunt(my daughter's maternal great aunt.)  Click on the image to enlarge.

The above segment matches are of segments matches which are  5cM or highter  on the FTDNA chromosome browser.  I've uploaded to GEDmatch and can do One To One comparisons.  I'll be able to run a list of matches and other comparison reports once it batch processes.

At GEDmatch with a threshold of 7 cMs or greater:
I match my Aunt at 1610 cMs over 39 segments(largest segment of 102cMs)
Sis matches Aunt at 1548 cMs over 45 segments(largest segment of 158 cMs)
My daughter matches her Great Aunt at 785 cM over 25 segments the largest is 72 cMs

For more DNA tools and reference click on the link in the blog menu at the top of the page (DNA Tools & Reference Links)

And AncestryDNA's estimated Amount of Shared DNA is.....

In last Wednesday's blog post I asked if anyone wanted to take a guess at how many shared cMs a cousin match at AncestryDNA was estimated by Ancestry to have.  The match is kin to me 5 different ways. On reevaluating I found yet another shared Double line.  The only person who posted a guess via the comments was Randy Seaver,  so regardless,  he is the closest.  :-)  Perhaps the question was intimidating--DNA research can be like that sometimes.  Randomness.  It doesn't always follow logic or mathematical principles inheritance-wise.

The match shared the following connections with me

5C1R(2x)------Nathan Frizzell & Margaret Deason(my 4Gr his 5Gr) (*)
4C---------------James Morrow & Margaret Sutton(both 3rd Grs)
4C---------------James Jakes & Nancy Harger(both 3rd Grs)
4C1R-----------James Jakes & Nancy Harger(my 3rd Gr= his 4th Gr)

Additional discoveries of
6C---------------James Knox & Elizabeth Craig(Eoff line goes back to them)
6C1R-----------James Knox & Elizabeth Craig(see above)

I used the BLUE for the relationships that were thru my PGM's Dad and the PINK
for the ones that were thru my PGM's Mom.

Typically half of your 4th cousins won't even share DNA with you.
If I had guessed I would have taken the average for all the relationship amounts

4C=13.28  (times 2)
4C1R=6.64
5C1R=1.66 (times 2)
6C= .83
6C1R= .42
Estimated Total that way would have been 37.77 cMs
Which would put me in really close to Randy's guess.  In reality I share 114 cMs across 9 segments as shown below.  That is a typical amount for 2nd Cousins once removed.

I should also note that the 114 cMs made it thru the Ancestry "cut" so it doesn't include anything that is in what they consider to be a "pile-up" region.  Ancestry matches will not include X Segments so there may still be more in common along the X where it is in the x inheritance path.  In typically fashion my sister has done it again and matched them more. The match shares 132 cMs with her across 7 segments.

I really need to see this match at GEDmatch. I think this is a great exercise in how large segments are passed.  In my daughter's matches there are many of the Wildes/Wilkinson descendants who share a large segment of 50 cMs on one chromosome.  Randomness for sure!

Care to guess the AncestryDNA estimated shared amount of cMs?

The DNA match(at AncestryDNA) that is related to me 5 different ways(all on my Dad's side) responded after a 2 year wait.  Never lose hope.  People get busy and have other priorities outside of genealogy---shocking--isn't it?

Here are all 4 connections paths with the Frizzell / Deason line being double for me so in essence 5 ways. Want to hazard a guess at the Ancestry predicted shared amount of cMs? Hopefully I will be able to see the amounts at GEDmatch soon and see what, if any, segments were excluded from that Ancestry estimate.  Also even with the intermarriage between these families I think I may be able to identify the difference in the segments. There are several testers who have the Frizzell/Deason lines exclusively, two with Morrow/Frizzell.

5C1R(2x)------Nathan Frizzell & Margaret Deason(my 4Gr his 5Gr) (*)
4C---------------James Morrow & Margaret Sutton(both 3rd Grs)
4C---------------James Jakes & Nancy Harger(both 3rd Grs)
4C1R-----------James Jakes & Nancy Harger(my 3rd Gr= his 4th Gr)

* my 4th Greats thru two lines.

Post your guess in the comments.  I'll post the answer along with the closest guess on Monday, April 17th. (There is no prize other than being correct or as close as possible)


Helpful Links:

Cousin Chart

Blaine Bettinger's Shared cM Project post
(link to the PDF file with range of shared cM amounts for given relationships is at the bottom of the post)

International Society of Genetic Genealogy Wiki  --autosomal DNA stats

Attempt at comparing MyHeritage test amounts onsite to MyHeritage test Uploads at GEDmatch

I have been curious to compare how my matches at MyHeritage show up(amount-wise) when they are uploaded to GEDmatch.  Today I noticed that I had  three new matches from MyHeritage at GEDmatch in addition to one that I'd had for about a week.  Uploaded MyHeritage kit are those identified by a prefix of the letter H.  That gave me a total of 4 matches to compare the reported amounts from MyHeritage to the matching amount at GEDmatch.  Sadly, I was only able to positively identify one of the matches.  I could not find the other 3 matches among my 89 matches at MyHeritage.  I did a scan of all nine pages and when that didn't result in me finding any of the 3 matches  I did a search for the full names and email user names.  Still nothing.  So then I looked up to the amount shown at GEDmatch + 10cMs nothing that looked like a match despite the fact that most of the users appeared to have used their full name.

Below are the amounts from GEDmatch and the comparison with the one match I was able to identify.  

Below is a screenshot of the last two matches on my My Heritage DNA matches.  They were sorted from Greatest Total Amount to smallest.  Why are matches 2, 3 and 4 not listed?  Is the Total Matching Theshold to make the list 15 cMs?  Smallest amount to be considered a segment match 5 cMs?

More questions than answers.  I did check the DNA Match quality info button, as well as the DNA help files to see if I could find the answer to the above questions but did not see anything listing what the cutoff amounts were to be listed, nor the minimum amount of cMs to be considered a matching segment.  I'll post an update if I figure out the answers. Comments are always welcome.