Deoxyribonucleic Acid | dē ˌen ˈā
Deoxyribonucleic acid, a self-replicating material which is present in nearly all living organisms as the main constituent of chromosomes. It is the carrier of genetic information.
DNA, or deoxyribonucleic acid, is the hereditary material in humans and almost all other organisms.
Nearly every cell in a person's body has the same DNA. Most DNA is located in the cell nucleus (where it is called nuclear DNA), but a small amount of DNA can also be found in the mitochondria (where it is called mitochondrial DNA or mtDNA).top
There are three DNA testing types
Three principal types of genealogical DNA tests are available, with each looking at a different part of the genome and useful for different types of genealogical research: autosomal, mitochondrial (mtDNA), and Y-DNA. Autosomal tests may result in a large amount of DNA matches (other test persons that the individual may be related to), along mixed male and female lines, each match with an estimated distance in the family tree. However, due to the random nature of the estimated distance, secure conclusions can only be made a small number of generations back. Autosomal tests are also used in estimating ethnic mix.Learn more about DNA Testing top
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