Showing posts with label DNA. Show all posts
Showing posts with label DNA. Show all posts

Sunday, September 7, 2014

rootstech 2014: Spencer Wells, DNA, and More

Brief Interview with Dr. Spencer Wells at rootstech 2014


I first learned of the work of Spencer Wells when his PBS series, The Journey of Manwas shown in the UK. I was fascinated by the way DNA could be used to tell the story of human migration. So, I was excited to see that his keynote address delivered at rootstech 2014 was available for viewing online. What I didn't realized that the video also included an opening sequence and a keynote talk by Judy Russell, the Legal Genealogist. You can watch it all here.

The animation sequence was well done and added a nice, profession touch. It is difficult to tell whether it represents several branches of one family or simply many families - it spans centuries, but the same red book is written in and held by all the immigrants portrayed. A discerning eye will notice that the first family is an English one who adopted the Protestant faith and left Europe to flee religious persecution. The next sequence is of a family travelling across a very stormy Atlantic. There is farming family and what seems to be a pioneer woman with a baby. There is a 20th century wedding. The final segment is of a worried looking couple with a young child on a train, possibly fleeing from their home. The sequence closed with the tag, "Every family has a story. What's Yours?"  I don't doubt that every family has a story; but the stories shown here, with the possible exception of the family on the train, are representative of only a few Northern European immigrant groups. In light of genealogy's early association with "whiteness" as discussed by Gregory Rodriguez, such a depiction of the American immigration story is disheartening.

I have met Judy Russell and enjoy listening to her speak. This talk, however, I did not really care for. It's a wide ranging keynote but the primary topics were the Genealogical Proof Standard and Oral History. She talks about "deliberately and accurately" handing down oral histories so that they can be preserved for future generations. Oh and then verified by using the Genealogical Proof Standard. But people only pass down what is important to them, what defines them as a people or a family. Where your grandfather learned to swim may not be important to anyone, so nobody talks about and it gets forgotten. However, other things may be remembered. She provides two examples of family histories that were deliberately passed down in her family. However, one of them probably wasn't. It had the sound of something that at worst had been created so that the family sounded authentically American or at best was badly researched. 

Spence Wells, Explorer-in-Residence at National Geographic, gives an excellent introduction to population genetics, DNA research, and Deep Ancestry. If you don't know anything about them, this will get you up to speed in about 30 minutes. He speaks about the Genographic Project and the rates of public participation, which mirror the increasing interest in consumer DNA testing. He also discusses the grants given to indigenous people who are such an important part of the project. Since these groups have occupied the same territory, sometimes for centuries, they provide the geographic anchor to the Genographic Project.

The two speakers provide an interesting contrast. Judy Russell is concerned about losing snippets of family history, like what was your grandmothers favorite toy, in three generations. Spencer Wells is concerned with entire indigenous cultures and languages that face extinction within one or two generations.

You can view other talks from rootstech 2014 here. The only other one I've seen is the talk on iPads by Lisa Louis Cooke; it made me want an iPad even more than before.

Sunday, August 31, 2014

Genes and Genealogy from Naked Genetics



In this edition of Naked Genetics from University of Cambridge listen to Professor Mark Jobling discuss how academic DNA sequencing intersects with genealogy research. While he understands that people want to know where their ancestors come from, the reality is that our ancestors didn't come from one specific location - they came from everywhere. The only ancestors we can trace with any confidence are those that passed down their Y chromosome and their mtDNA which represent only two individuals. This segment opens the program.

Then unless you are super keen on genetics, skip ahead to 18:07 to hear Dr. Turi King discuss her research on the Y-chromosome. She uses this chromosome in connection with surnames to trace Norse Viking migrations.

image credit: Zephyris

Wednesday, February 15, 2012

Eve and DNAdam

How Mitochondrial Eve Connected All Humanity and Rewrote Human Evolution, was originally published in April 2011 in honor of the 25th anniversary of discovery of Mitochondrial Eve. It includes a good summary of the import of Mitochondrial Eve and the much younger Y-chromosome Adam. There is also discussion of how many potential ancestors you could have (and how many are statistically duplicates) and of our MCRA (most common recent ancestor).

with thanks to @thathistorian

Wednesday, March 16, 2011

Henry Louis Gates, Jr. and Finding Oprah's Roots

Finding Oprah's Roots - Finding Your Own


I am a big fan of Henry Louis Gates' programs, African American Lives, African American Lives 2, and Faces of America. What I like about them is he used the family histories of the show's participants to illustrate larger trends in African American history and American Immigration history. This is my favorite thing about family history research - its ability to connect us very personally to past events.

When I saw Finding Oprah's Roots: Finding Your Own at the library I picked up, thinking it would be similar to the previous programs. I watched it last night and learned otherwise. It was essentially an instruction manual on doing African American genealogy using Oprah Winfrey's and Gates' family histories as examples. (In my defense, lest you think I can't read, the library had placed a big sticker over the second part of the title, "finding your own."). There are also extensive interviews with genealogists and geneticists, which explain the processes of the research more fully than in African American Lives 1 and 2.

Henry Louis Gates may be a "genealogy junkie" but he is no historian. His academic work is in literary theory and criticism. On occasion he makes some overly general and sweeping statements about the past. In this particular program he even gets the date of the end of Reconstruction wrong. But the reality is history is for every one, not just historians. Additionally, I enjoy his enthusiasm and his desire to connect people, particularly African Americans, to their past.

I thought Finding Oprah's Roots was a good program. I think it would be useful if you didn't feel like sitting down to read one of the many books on doing African American genealogy. For those of you who do not have African American ancestry, you may find the expanded sequences on DNA interesting, particularly if you are considering being tested.