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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 (with lower reliability) to estimate the ethnic mixture of an individual.
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.
Genealogical DNA test – used to determine ancestry or ethnic heritage for genetic genealogy. Research testing – includes finding unknown genes, learning how genes work and advancing understanding of genetic conditions. The results of testing done as part of a research study are usually not available to patients or their healthcare providers.
The results of this test provide percentages of a DNA associated with general regions or specific ethnic groups (e.g. Western Europe, Asia, Jewish, Native American, etc.). Notably, unlike other testing companies, they chose to strip out markers for mendelian medical issues, [23] [24] [25] mtDNA results, and Y-DNA SNP results.
One exception to this are the Chibcha speakers of Colombia, whose ancestry comes from both North and South America. [31] In 2014, the autosomal DNA of a 12,500+ year old infant from Montana was sequenced. [32] The DNA was taken from a skeleton referred to as Anzick-1, found in close association with several Clovis artifacts.
For some people, at-home DNA tests such as Ancestry.com and 23andMe have led to some unexpected and, in some cases, shocking results. From reconnected family members to unexpected health risks ...