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The one-drop rule was a legal principle of racial classification that was prominent in the 20th-century United States. It asserted that any person with even one ancestor of black ancestry is considered black. It is an example of hypodescent, the automatic assignment of children of a mixed union between different socioeconomic or ethnic groups to the group with the lower status, regardless of proportion of ancestry in different groups.
Genetic genealogy is the use of genealogical DNA tests, i.e., DNA profiling and DNA testing, in combination with traditional genealogical methods, to infer genetic relationships between individuals. This application of genetics came to be used by family historians in the 21st century, as DNA tests became affordable. The tests have been promoted by amateur groups, such as surname study groups or regional genealogical groups, as well as research projects such as the Genographic Project.
The Genographic Project, launched on 13 April 2005 by the National Geographic Society and IBM, was a genetic anthropological study that aimed to map historical human migrations patterns by collecting and analyzing DNA samples. The final phase of the project was Geno 2.0 Next Generation. Upon retirement of the site, 1,006,542 participants in over 140 countries had joined the project.
A genealogical DNA test is a DNA-based genetic test used in genetic genealogy that looks at specific locations of a person's genome in order to find or verify ancestral genealogical relationships, or to estimate the ethnic mixture of an individual. Since different testing companies use different ethnic reference groups and different matching algorithms, ethnicity estimates for an individual vary between tests, sometimes dramatically.
Ancestry.com LLC is an American genealogy company based in Lehi, Utah. The largest for-profit genealogy company in the world, it operates a network of genealogical, historical records, and related genetic genealogy websites.
FamilyTreeDNA is a division of Gene by Gene, a commercial genetic testing company based in Houston, Texas. FamilyTreeDNA offers analysis of autosomal DNA, Y-DNA, and mitochondrial DNA to individuals for genealogical purpose. With a database of more than two million records, it is the most popular company worldwide for Y-DNA and mitochondrial DNA, and the fourth most popular for autosomal DNA. In Europe, it is the most common also for autosomal DNA. FamilyTreeDNA as a division of Gene by Gene were acquired by MYDNA, Inc., an Australian company, in January 2021.
DNAPrint Genomics was a genetics company with a wide range of products related to genetic profiling. They were the first company to introduce forensic and consumer genomics products, which were developed immediately upon the publication of the first complete draft of the human genome in the early 2000s. They researched, developed, and marketed the first ever consumer genomics product, based on "Ancestry Informative Markers" which they used to correctly identify the BioGeographical Ancestry (BGA) of a human based on a sample of their DNA. They also researched, developed and marketed the first ever forensic genomics product - DNAWITNESS - which was used to create a physical profile of donors of crime scene DNA. The company reached a peak of roughly $3M/year revenues but ceased operations in February 2009.
"Benjaman Kyle" was the alias chosen by an American man who had severe amnesia. On August 31, 2004, he was found naked and injured, without any possessions or identification, next to a dumpster behind a Burger King restaurant in Richmond Hill, Georgia. Between 2004 and 2015, neither he nor the authorities determined his identity or background, despite searches that had included television publicity and various other methods.
Colleen M. Fitzpatrick is an American forensic scientist, genealogist and entrepreneur. She helped identify remains found in the crash site of Northwest Flight 4422, that crashed in Alaska in 1948, and co-founded the DNA Doe Project which identifies previously unidentified bodies and runs Identifinders International, an investigative genetic genealogy consulting firm which helps identify victims and perpetrators of violent crimes.
Bennett C. Greenspan is an American businessman. His business ventures have covered industries from real estate to the .com boom. Though he has mainly worked in the fields of photography and genetic testing, he is best known for his pioneering work in genetic genealogy.
Finding Your Roots with Henry Louis Gates, Jr. is a documentary television series hosted by Henry Louis Gates Jr. that premiered on March 25, 2012, on PBS. In each episode, celebrities are presented with a "book of life" that is compiled with information researched by professional genealogists that allows them to view their ancestral histories, learn about familial connections and discover secrets about their lineage.
The International Society of Genetic Genealogy (ISOGG) is an independent non-commercial nonprofit organization of genetic genealogists run by volunteers. It was founded by a group of surname DNA project administrators in 2005 to promote DNA testing for genealogy. It advocates the use of genetics in genealogical research, provides educational resources for genealogists interested in DNA testing, and facilitates networking among genetic genealogists. As of June 2013, it comprises over 8,000 members in 70 countries. As of July 2013, regional meetings are coordinated by 20 volunteer regional coordinators located in the United States, Australia, Brazil, Canada, England, Egypt, Ireland and Russia.
Genetic privacy involves the concept of personal privacy concerning the storing, repurposing, provision to third parties, and displaying of information pertaining to one's genetic information. This concept also encompasses privacy regarding the ability to identify specific individuals by their genetic sequence, and the potential to gain information on specific characteristics about that person via portions of their genetic information, such as their propensity for specific diseases or their immediate or distant ancestry.
Kim TallBear is a Sisseton Wahpeton Oyate professor at the University of Alberta, specializing in racial politics in science. Holding the first ever Canada Research Chair in Indigenous Peoples, Technoscience and Environment, TallBear has published on DNA testing, race science and Indigenous identities, as well as on polyamory as a decolonization practice.
Investigative genetic genealogy, or forensic genetic genealogy, is the emerging practice of utilizing genetic information from direct-to-consumer companies for identifying suspects or victims in criminal cases. As of September 2021, the use of this practice has led to the discovery of over 150 suspects of murder and sexual assault. The investigative power of genetic genealogy revolves around the use of publicly accessible genealogy databases such as GEDMatch and FamilyTreeDNA. On GEDMatch, users are able to upload their genetic data from any direct-to-consumer company in an effort to identify relatives that have tested at companies other than their own.
GEDmatch is an online service to compare autosomal DNA data files from different testing companies. The website gained significant media coverage in April 2018 after it was used by law enforcement to identify a suspect in the Golden State Killer case in California. Other law-enforcement agencies started using GEDmatch for violent crimes, making it "the de facto DNA and genealogy database for all of law enforcement", according to The Atlantic's Sarah Zhang.
DNA Doe Project is an American nonprofit volunteer organization formed to identify unidentified deceased persons using forensic genealogy. Volunteers identify victims of automobile accidents, homicide, and unusual circumstances and persons who committed suicide under an alias. The group was founded in 2017 by Colleen M. Fitzpatrick and Margaret Press.
In human population genetics, Native American ancestry is the theory that genetic ancestry can trace a relationship back to one or more individuals who were Indigenous to the Americas. Tests cannot pinpoint specific Native American tribes, nor can tests determine whether someone is Native American or not.
DNA Family Secrets is a British television series which began airing on BBC Two in March 2021. The programme is presented by Stacey Dooley and geneticist, Professor Turi King, and uses the latest DNA technology to solve family mysteries around ancestry, missing relatives and genetic disease. The second series began airing on 11 May 2022.
Elizabeth "Lisa" Ann Roberts, otherwise known as Precious Jane Doe, was an American homicide victim found near Everett, Washington on August 14, 1977, who was an unidentified decedent for 43 years until being identified on June 16, 2020. She had been picked up by a male driver while hitchhiking and killed after refusing sex. Her assailant had strangled her with a cord and then emptied his gun into her head, complicating identification. Roberts was a teen runaway who left her Oregon home in July 1977, less than a month before her murder. She was given the nickname "Precious Jane Doe" by Detective Jim Scharf, who began investigating the case in 2008. The detective was quoted as saying, "This young girl was precious to me because her moral decision from her proper upbringing cost her her life [...] I knew she had to be precious to her family too, so I had to find them. We needed to give her name back to her and return her remains to her family." Roberts was 17 at the time of her murder, though initial police estimations of her age were much older. Her body was found by blackberry pickers, and the medical examiner determined she had been dead for approximately 5 days before discovery. She was discovered fully clothed in a pastel tank top and denim cutoffs. As her identity remained unknown, Roberts' case was relegated as a cold case. In 2020, genetic testing via hair samples was used to locate her biological family, who led to her adoptive family.
References
- ↑ Ridley, Jane. "3 people describe the shock of discovering through at-home DNA tests that they were a different race than they'd thought". Insider.
- ↑ Ridley, Jane. "I thought I was biracial my entire life. At 43, a DNA test revealed I'm white with Jewish ancestry". Insider.
- ↑ "A DNA kit and a genetic identity shift: Interview with Alesia Cohen Weiss of Right to Know". June 17, 2021.
- ↑ "AncestrySupport". support.ancestry.com.
- ↑ "The Right to Know". January 7, 2020.