There are many people who are familiar with the term genealogy testing, but are unaware of its exact meaning. If you are also one of this group, and if you want to improve your understanding about what a genealogy test is, then the information given below can help you a lot in this area.
Genealogy testing, is more commonly known as the genealogical DNA test and helps in examining the nucleotides present on certain locations in the DNA of the person. The reason for conducting such a test is to know about the genes and for other purposes of genetic genealogy.
However, it is important to note that the test’s results do not possess any sort of medical value and are also not very useful in determining the specific genetic diseases or any sort of genetic disorders. The main reason for conducting the genealogy test is to give all sorts of genealogical information to the person.
The genealogy test involves the comparison of results of living beings that are somehow related to historic populations. If we talk about the general procedure that is used for taking the genealogical DNA test, then it is noteworthy that it is just a cheek-scraping conducted at home which is totally painless and then sending the sample via mail to the laboratory for genetic genealogy for testing.
In a genealogy test, there are several laboratories that use simple mouth washes or commonly used chewing gums rather than the cheek swabs. There are several other very good laboratories available as well that offer the facility of the storage of samples of DNA for future use.
In a sequence of DNA when a change takes place to the single nucleotide, it is termed as a single nucleotide polymorphism or in short form SNP. It is again important to note here that the mutation rate (relative) for a single nucleotide polymorphism is very low. It is because of this property that they are considered simply the best for extracting history of the human tree. The single nucleotide polymorphisms are always assigned a number as well as a letter code. The letter implies the name of the researching lab that has researched the SNP, whereas the number implies the order of the discovery.
For understanding the test results in a better manner, it is important to note that the tests of Y-DNA scrutinize 10-67 markers of STR on the chromosomes of Y, though the availability of more than 100 markers is there. The advantage of the test results of STR is that they help in providing the information on personal haplotype. By the results of SNP, the haplogroup is indicated.
So this is something about the genealogy test and its related components, hopefully you will find this information helpful in your research.
Filed under: Genetic studies