Ændringer

:Autosomal DNA (often abbreviated atDNA) is comprised of the first 22 pair of chromosomes, also known as the autosomes. A person gets approximately one-half of their atDNA from each parent. The contribution from each preceding generation is reduced by a factor of 2, 1/2 from each parent, 1/4 from each grandparent and so on.

:Autosomal DNA (often abbreviated atDNA) is comprised of the first 22 pair of chromosomes, also known as the autosomes. A person gets approximately one-half of their atDNA from each parent. The contribution from each preceding generation is reduced by a factor of 2, 1/2 from each parent, 1/4 from each grandparent and so on.

:uman DNA contains approximately three billion base pairs, which are inherited from your ancestors. Base pairs provide the data we use in DNA and, at 32 generations back, one would have 4.3 billion ancestors, or more ancestors than you have base pairs, so it can be seen that it is impossible for anyone to have DNA from all their ancestors. Assuming 30 to 35 years per generation, this represents ancestors from approximately 1,000 years ago. This illustrates again why ethnicity predictions from autosomal tests should be taken as light-hearted factoids and not serious genealogy. An ethnicity report is based on population groups from tens of thousands of years ago and many of your ancestors will not be represented in your DNA.

:Human DNA contains approximately three billion base pairs, which are inherited from your ancestors. Base pairs provide the data we use in DNA and, at 32 generations back, one would have 4.3 billion ancestors, or more ancestors than you have base pairs, so it can be seen that it is impossible for anyone to have DNA from all their ancestors. Assuming 30 to 35 years per generation, this represents ancestors from approximately 1,000 years ago. This illustrates again why ethnicity predictions from autosomal tests should be taken as light-hearted factoids and not serious genealogy. An ethnicity report is based on population groups from tens of thousands of years ago and many of your ancestors will not be represented in your DNA.

'''  Genealogically Useful Time Frame '''  

'''  Genealogically Useful Time Frame '''