Tag Archive | 23andme

A Triangulation Feature on the New 23andme

An exciting triangulation feature is available at 23andme.  This feature shows you the relatives you have in common with one other profile and whether or not they triangulate with the two of you.

To use this tool you go to  Family & Friends > DNA relatives  and pick a DNA relative to look at. Scroll down the page towards the bottom where you will see a display like this (names removed for privacy): [previous 2 paragraphs updated 10 May 2019]

RICsmll

When there is a “Yes” in the right hand column, there is a DNA segment in common between the two people you are comparing and this third person thus you triangulate. A “No” means that although you each share DNA with this relative, there is no segment of DNA where all three of you match. Click on the Yes (or a No) to see the three of you compared in the chromosome browser.

Once in the chromosome browser, you can use the “Update View – Edit” to add more people to the comparison with the first person. This is the same chromosome browser that you get to from Tools > DNA relatives > DNA

Jason Lee has done a nice write up with more details on his DNA blog at Tumblr:
http://dnagenealogy.tumblr.com/post/144966221253/relatives-in-common-quick-reaction

 

Ancestry Composition Comparisons: a Case Study

Discovering where your ancestors came from is one of the more popular reasons to do a DNA test but the current ancestry composition algorithms have a long way to go. Sometimes East Asian ancestry is actually American Indian and South Asian might be gypsy or Indian Indian. Scandinavian might be British or North German and British and Irish might be Scandinavian.

Most efforts to analyze the deeper roots of your ancestry are based on samples of modern populations who self report four grandparents of a single ethnicity plus some public databases and a few ancient samples. Since each company relies greatly on their own databases of tested people, it is not surprising to see differences in their predictions.

My brother's Ancestry as shown at DNA.land

My brother’s Ancestry as shown at DNA.land

Since my brother is tested at all three companies I thought I would post the images of what each company sees in his DNA as well show the new report from DNA.land and a few from GEDmatch (both using his uploaded Ancestry.com DNA data). We are confident of our recent ancestry: 50% Southern Norwegian, 25% Bavarian German and 25% Ashkenazi.

The new DNA.land report is shown above, Hmmm, only 16% Ashkenazi.

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Patience please with the new 23andme

A while back I did a blog post explaining how to navigate the new 23andme (click here to read that). A number of my complaints in that post are now fixed. Most importantly, the ability to search for people to compare on the DNA Relatives > DNA page is there plus a table view which gives the numbers.

I cannot agree with the genetic genealogists who are abandoning 23andme due to the problems with its change over to their new web site, as well as the perceived lack of response to genetic genealogists. 23andme never made a secret of the fact that they are in this to research the genetics of various medical conditions. That is fine with me, as my extended family has many medical issues to look into, most, thankfully quite minor. They did make some nice tools for genealogists to attract more users into their database, but we have never been their primary concern.

Disovery23andmeS

While I do recommend Ancestry.com DNA testing for most new testers, many of my cousins want the medical information and so are willing to pay the extra for 23andme. It also has the best ancestry composition of the big three.

Personally though, my main reason for being patient and staying with 23andme is that I have found so many Norwegian and Norwegian-American cousins there (over 30) while only one or two at the other companies. Maybe we Scandinavians just have more genetic health issues. I also like the ability to compare cousins to each other and look at the ancestry composition by chromosome (although that is currently gone on the new site).

While 23andme is changing over to their new system, those of us with kits still on the old system have struggled to contact and share with our new matches. Initially we could not send shares to new matches so had to message them and ask them to send us a share. Thankfully that is fixed.
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Initial report on the new 23andme for the advanced user

One of my cousin’s kits that I manage has transitioned to the new 23andme. Here is the scoop. Most everything you do on the site seems to require that you go through a tutorial before you can participate and most everything seems to have been simplified.

OpenSharing

You do have to review your profile information and choose to opt into the Open Sharing the first time you log in. Open sharing lets your matches compare their DNA to yours to see if there are any matching segments without going through the introduction message process. This is recommended if you are doing 23andme for genealogy or adoption research.

The problem is that those of us who are deeply into using DNA for ancestry research will be disappointed by some of the loss of functionality on the new version of the site as well as by the fact that some functions are significantly clunkier for us.

The new main menu is greatly simplified, definitely an improvement. Instead of those fancy drop downs you have just four items; Home, Reports, Tools, and Research plus the little green icon with the number of messages you have listed. You have to click one of those to get to further menus.

New23andmeMenu

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Time to send your last 23andme invitations

It is time to cancel and re-invite all your closest anonymous matches at 23andme, letting them know that this is their last chance. After November 11 they will disappear from your relative lists as will all your pending introductions. Anonymous users will no longer be allowed to participate in DNA relatives. They can change their status in settings. Warning, if you are using a nickname rather than a real sounding name or initials, your profile will automatically be changed to anonymous (this does not include the nickname you had to specify for posting to forums). This proviso is still a little unclear to me, presumably when you are switched to the new 23andme, you can make changes to your profile then.

Update23andme

Another big change is that Countries of Ancestry is going away ,so download that spreadsheet now.

The good news is that the cap of 1000 matches is being raised to 2000. Also another good thing is that you can set yourself to “Open Sharing” which lets other open sharers compare matching DNA segments to you without the cumbersome introduction system

23andme has provided a page that maps old features to new (click here or on the image above):
A number of bloggers have written detailed posts on the changes coming to 23andme. Here are several good ones. You can also click here for the thread in the community section at 23andme.

Blogger Reports:

Shannon Christmas: http://throughthetreesblog.tumblr.com/post/131724191762/the-23andme-metamorphosis

Judy Russell: http://www.legalgenealogist.com/blog/2015/10/25/the-changes-at-23andme/

Roberta Estes: http://dna-explained.com/2015/10/21/23andme-to-get-a-makeover-after-agreement-with-fda/

Now to get back to cancelling and sending my new last chance messages!