Archive | 2013

The Basics at 23andMe

My family members asked me to write a 23andme tutorial, so here it is. Let me know what else I should put here.

The three things most people like best at 23andme are learning about their health issues (currently disabled for new kits because of the FDA ruling), their ancestral places of origin, and finding DNA cousins (my term for people who share DNA that thus, must be related, however distantly). There is a wealth of other fun information available like how much Neanderthal DNA you have in you, but this post will mainly just cover those first three areas.

When you log in to 23andme you will see a page something like this.

You can click on Home in that top bar from any page on the site to return to this page. The ancestry composition box shown mid-page may not yet be ready for your sample if your results are just in.

To edit your profile, click on your name or photo on the far top right to get a menu with that option. If you have any messages the envelope at the top right will get a green background and show the number of messages you have as in the example below. Click on it to read them. I advise switching to email if you start to communicate with someone regularly as there are no tools to search the inbox unless you use chrome and the 23+ addon.
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We have found our ancestor Lars Monsen!

Mar6

Due to DNA testing, in a round about way, we have probably solved the brick wall of our ancestor Lars Monsen who was born in the Bergen area and lived in Kristiansand, Norway. His great-grandson Lauritz (later Lawrence Josiah Munson), my grandfather, came to Brooklyn, NY, with his family when he was six. That story is posted on this page about the Monsens at my family history site.

Lars Monsen had been our brick wall for a long time since it is a common name in the Bergen area although not, we thought, in southern Norway. Well it turns out there really were two men named Lars Monsen in Kristiansand at that time. One was Lars Monsen Suldahl (thus from Suldahl) and ours was Lars Monsen or Mognsen Aastvedt from Eidsvaag (just north of Bergen)

Here is the story. Dad’s Y DNA matched almost 6000 people at 12 markers on the family tree DNA site. So I used the Ysearch site to look for only Bergen area matches. I contacted those two people and heard back from one. Next we both upgraded to 37 markers to see if we still matched. In the meantime our match, Sigmund, posted some queries in the best Norwegian forums for Bergen and Kristiansand areas and the local historian/genealogy experts weighed in and found a likely candidate for our Lars. Sigmund now found us a male line descendant from Lar’s grandad and sent him a Y DNA test kit! [UPDATE: they matched, see http://blog.kittycooper.com/2013/05/its-a-match-lars-monsens-ancestors-are-found/ }

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How is it that I share such a large DNA segment with so distant a cousin?

Feb5

I recently posted this insight to the DNA-NEWBIE mailing list.

I have found it interesting that I share fairly large segments with a 10th and a 14th cousin but none with a 4th cousin that my Dad does share DNA with. Norwegian records are good so all these cousins have good paper trails. i did notice that we all come from many generations of large families…

This blog article offers a good mathematical explanation of this phenominum.

http://ongenetics.blogspot.com/2011/02/genetic-genealogy-and-single-segment.html?m=1

Finding Distant Relatives with Autosomal DNA Testing

Jan14

Maybe you tested your DNA to prove or disprove a genealogical theory. Or maybe you tested to check on your health risks or carrier status. But now you see all these possible 3rd to 5th cousins in your family finder or relative finder lists and you wonder if you are related and if you can find that relationship. Perhaps you contacted a few and had almost no responses.

Yes you are probably related, but without both of you having a good paper trail you would be most lucky to actually find that relationship. It is likely to be further back than suggested if your ancestors were at all endogamous. Just living in the same location for a few hundred years can lead to much inadvertent intermarrying and more common DNA than degree of relationship would expect. So autosomal DNA testing is no genealogical shortcut. Some of the people you contacted already know this, so if they saw no common surnames or places on your profile they may have lost interest.

So be prepared before contacting those likely 3rd to 5th cousins.

Have an easily readable pedigree chart in both PDF and online format (GEDmatch can do the latter, more on GEDmatch later)
Another good tool is a list of about 12 generations of ancestors by place name. Much easier for a possible relative to scan.
Do some reading on the basics. UPDATE 9-sep-2018 See my article – http://blog.kittycooper.com/dna-basics/
Try to talk some close relatives into testing so you have more data to work with
Last but not least, make a decision on how much time you want to devote to this project … warning it can be addictive

If you want to do the minimum, then scan the localities and surnames of these possible cousins and contact the ones with surnames or place names in common with you. Indicate in your message that this is the reason for contact. Include the URL for your pedigree or family site and offer to send the PDF files. Include your email address if you are using the 23andme messaging system. The more directed the contact, the more likely you will hear back. I recently went through and cancelled some of my early invitations and send new improved ones on the lines above and got four new shares.