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We associate genetic tests or research with two things: either scientists in white aprons straight from science fiction movies, or on the ground level: with checking, for judicial purposes, whether a man is the child's genetic father. Meanwhile, a new category of services has appeared on the market - a simple and quick check of our genetic heritage.
This type of service is usually associated with a website that collects genealogy information. And in fact, genetic data can help find cousins ​​unknown to us. After ordering the test service, we receive a set to collect a sample of genetic material. It sounds serious, but it involves ... spitting into the tube.
The basic information that this type of research provides is knowledge of our genetic heritage: where our ancestors came from, also in the perspective of thousands of years. Often (this is the case, for example, with tests offered by Ancestry DNA), we have the opportunity to contact - also anonymously - with related persons.

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Genetic testing - what and how is it tested?

Autosomal DNA contains 22 pairs of chromosomes. We receive them with equal probability from each of the parents and less likely from grandparents and great grandparents. After receiving data on the chromosomes of the examined person, they begin to be mapped to establish kinship.
Matching is done by finding strings of the same SNPs (combinations of nucleotides). If the right number of SNPs matches the data of another person, they are considered a match - a potential cousin.

Ethnicity tests are another test performed on the received data. They are usually presented as a percentage by ethnic group. These data are based on previously collected information - in the populations of individual regions.
They allow us to trace the history of our family from times from which we do not have genealogical data.