Änderungen

:atDNA <ref>[http://isogg.org/wiki/Portal:Autosomal_DNA ISOGG Autosomal DNA]</ref> is inherited from both parents, approximately half from each parent (i.e. it is recombinant). Sophisticated matching mechanisms are required to compare atDNA tests and the amount of autosomal DNA inherited from an ancestor diminishes exponentially with each preceding generation. It is useful in finding recent relatives out to the third and fourth generation and, occasionally, more distantly related. <em>Progress is being made in identifying which parent contributed specific segments of one's DNA,though it may not be useful to most researchers.</em>

:atDNA <ref>[http://isogg.org/wiki/Portal:Autosomal_DNA ISOGG Autosomal DNA]</ref> is inherited from both parents, approximately half from each parent (i.e. it is recombinant). Sophisticated matching mechanisms are required to compare atDNA tests and the amount of autosomal DNA inherited from an ancestor diminishes exponentially with each preceding generation. It is useful in finding recent relatives out to the third and fourth generation and, occasionally, more distantly related. <em>Progress is being made in identifying which parent contributed specific segments of one's DNA,though it may not be useful to most researchers.</em>

:One of the well-deserved criticisms levelled at atDNA is the assertion that it can identify one's ethnicity or geographic origins. This is due to several factors, e.g. (a) one loses the contribution from an ancestor every 7 to 10 generations; (b) the ethnicity predictions are based on studies of people groups who have survived but ancestors whose genetic information has been lost cannot be represented, and (c) it cannot be known for certain where any people group lived at any particular time. <em>(Note that all the DNA tests provide ethnicity information. Y-DNA and mtDNA are more useful, albeit for a smaller subset of one's ancestors.)</em>

:One of the well-deserved criticisms levelled at atDNA is the assertion that it can identify one's ethnicity or geographic origins. This is only partly true due to several factors, e.g. (a) one loses the contribution from an ancestor every 7 to 10 generations; (b) the ethnicity predictions are based on studies of people groups who have survived but ancestors whose genetic information has been lost cannot be represented, and (c) it cannot be known for certain where any people group lived at any particular time. <em>(Note that all the DNA tests provide ethnicity information. Y-DNA and mtDNA are more useful, albeit for a smaller subset of one's ancestors.)</em>

=== mitochondrial DNA (mtDNA) ===

=== mitochondrial DNA (mtDNA) ===