PLEASE NOTE: This post is a parody, and has two purposes: (1) simply for the sake of light-hearted fun; and (2) to provoke conversation with geneticists and researchers in this field (not that it will do so anyway!). So many of the recent studies about consumer reactions and/or guidelines for DTC testing have been released without any data at all, or have been studies involving a handful of test-takers. I believe that further studies are absolutely vital, but they should be an in-depth analysis rather than the curt and superficial write-ups that have been done to date. Rather than contribute to solving issues related to DTC testing, these incomplete studies add to the confusion surrounding the field.
So, ASHG geneticists, if you can see the humor in things and are willing to accept challenges to your way of thinking, read the post below! Otherwise, click here: http://www.ashg.org.
ScienceNews reports that researchers led by Eske Willerslev at the University of Copenhagen are attempting to sequence the genome of legendary Native American “Sitting Bull” (see “Genome of a Chief”).
Earlier this year (2010), Eske Willersleve announced the successful sequencing of approximately 80% of the genome of “Inuk,” a man from Greenland who left behind a few small fragments of bone and four hairs frozen in permafrost when he died about 4,000 years ago (see “Long-Locked Genome of Ancient Man Sequenced”). Using these ancient DNA sequencing techniques, Willersleve’s group is analyzing DNA from other samples.
One of these samples is a lock of hair from Sitting Bull.
Sitting Bull (c. 1831 – Dec. 15, 1890) was a Hunkpapa Lokota Sioux born in South Dakota. Sitting Bull played an important role in the June 25, 1876 Battle of the Little Bighorn, and later toured as a performer in Buffalo Bill’s Wild West show.
This morning, a single tweet sent me on a 2-hour tour (more, if you count drafting this post!) of my genome.
In the tweet, Mary Carmichael expressed interest in a potential book regarding the orchid/dandelion theory recently described in a December 2009 article in The Atlantic “The Science of Success.” Before this morning, I was not familiar with either the article or the theory.
The introduction to the article, reproduced below, does a good job of summarizing the main thrust of the very long (but extremely interested and worthwhile) report:
“Most of us have genes that make us as hardy as dandelions: able to take root and survive almost anywhere. A few of us, however, are more like the orchid: fragile and fickle, but capable of blooming spectacularly if given greenhouse care. So holds a provocative new theory of genetics, which asserts that the very genes that give us the most trouble as a species, causing behaviors that are self-destructive and antisocial, also underlie humankind’s phenomenal adaptability and evolutionary success. With a bad environment and poor parenting, orchid children can end up depressed, drug-addicted, or in jail—but with the right environment and good parenting, they can grow up to be society’s most creative, successful, and happy people.”
From a Press Release issued by Family Tree DNA on August 11, 2010:
FAMILY TREE DNA’S 6th INTERNATIONAL CONFERENCE ON GENETIC GENEALOGY FOR GROUP ADMINISTRATORS TO BE HELD OCTOBER 30 & 31, 2010 IN HOUSTON
HOUSTON, (August 11, 2010) — Family Tree DNA, the world leader in genetic genealogy, will host its 6th International Conference on Genetic Genealogy on October 30-31, 2010, at the Sheraton North Houston in Houston, Texas. Each year, world renowned experts in genetics and science present cutting-edge developments and exciting new applications at this two-day educational forum which draws attendees from Family Tree DNA’s Group Administrators from around the world. This year’s conference will focus on the new Family Finder test which allows customers to find relatives across all ancestral lines.
Last week I wrote about the results of my Family Finder autosomal DNA test by Family Tree DNA (see “A Review of Family Tree DNA’s Family Finder – Part I“). The Family Finder test uses a whole-genome SNP scan to find stretches of DNA shared by two individuals, thus identifying your genetic cousins (and will soon include the Population Finder analysis of admixture percentages). I currently have over 33 genetic cousins in Family Finder, and I’m working with them to identify our common ancestor(s).
The Affymetrix microarray chip used by FTDNA includes over 500,000 pairs of SNPs located on the X chromosome and the autosomes (no Y chromosome SNPs). Via SNPedia:
FamilyTreeDNA uses an Affymetrix Axiom CEU microarray chip with 3,269 SNPs removed (563,800 SNPs reported) for autosomal and X (but not Y or mitochondrial) ancestry testing for $289. Other sources have cited 548011 snps. This platform tests 1871 of the 12442 snps in SNPedia.
Mary Carmichael, a science editor for Newsweek, is in the midst of aweek-long dilemma. This Friday, after reading a series of articles written by members of the DTC genetic testing community, she will decide whether she should purchase a genome-wide SNP analysis. Although the decision might be a simple one for some, in light of the recent critique of DTC genetic testing in the media, in the literature, and by the government, it is certainly understandable that Mary is looking for further insight into her decision.
Today, Mary is asking “What Can I Learn From At-Home DNA Tests?” and has gathered answers to her question from a wide variety of writers and scientists, including myself. Since the Newsweek site only has space for a brief introduction to each topic, this post is meant to be a more in-depth answer what Mary could learn about her ancestry from a DTC test.
Since late 2007, several “direct-to-consumer” or “DTC” genetic testing products have entered the marketplace, many of which offered some degree of autosomal ancestry analysis (including 23andMe, deCODEme, and Pathway Genomics, among others).
On May 6, 2010, the Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany presented the world with a draft of the genome sequence of the Neanderthal (press release here (pdf) and full article here (free), NYT article here). As part of the announcement, the team presented their conclusion that 1% to 4% of the genome of non-Africans is derived from Neanderthals:
“An initial comparison of the two sequences has brought some exciting discoveries to light. Contrary to the assumption of many researchers, it would appear that some Neandertals and early modern humans interbred. According to the researchers’ calculations, between one and four percent of the DNA of many humans living today originate from the Neandertal. ‘Those of us who live outside Africa carry a little Neandertal DNA in us,’ says Svante Pääbo. Previous tests carried out on the DNA of Neandertal mitochondria, which represents just a tiny part of the whole genome, had not found any evidence of such interbreeding or ‘admixture.'”
This paper is a follow-up to a 2008 paper called the “ASHG Ancestry Testing Statement and Recommendations” in which a committee from the ASHG addressed concerns about the claims made by genetic ancestry testing companies. I wrote an article here on the blog at the time – The ASHG Ancestry Testing Statement and Recommendations – that highlighted a number of concerns I had about the statement and the recommendations.
When I wrote the November 13, 2008 blog post, I began by pointing out my personal positions, which have largely remained unchanged in the intervening 1.5 years: