Showing posts with label Comparison. Show all posts
Showing posts with label Comparison. Show all posts

Friday, January 05, 2018

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)

Wednesday, March 22, 2017

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.


Tuesday, May 03, 2016

AncestryDNA's new update: Before & After comparison using my kits

After 2+ weeks without matches to my AncestryDNA kits and waiting on my sister's kit to finish processing the results are in.  As I logged on shortly after lunch today I saw this message and started seeing my sister as a match in the kits I manage.




I have several kits at AncestryDNA:  Mine, My Mom's kit and my Daughter's kit.
I made note prior to the changes of the amount of Hints, 4th Cousins & Greater, DNA Circles, New Ancestor Discoveries and pages of matches each of the kits had.  The chart below shows a comparison.  I did expect the amount of circles to decrease as some people fell out of the match range. My sister's kit had no data prior to the roll out as it had not processed.




Now I am hoping to get her kit to GEDmatch.  Have you tested at Ancestry?  How did yours compare?

Sunday, October 18, 2015

Total cM Comparisons over Known Relationships

Below is the chart showing the Total cM Comparisons over Known Relationships for my Daughter.
Click on the image to enlarge it.
















For those interested in seeing more comparisons and averages check out The Shared cM Project at The Genetic Genealogist's website.  Also there are several charts at the ISOGG wiki.