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<a accesskey="3" href="page.php?w=ancient_DNA&amp;p=2">3.Next</a>
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<p><b>Ancient DNA</b> (<b>aDNA</b>) is <a href="page.php?w=DNA">DNA</a> isolated from ancient sources (typically <a href="page.php?w=Biological_specimen">specimens</a>, but also <a href="page.php?w=environmental_DNA">environmental DNA</a>). Due to degradation processes (including <a href="page.php?w=Crosslinking_of_DNA">cross-linking</a>, <a href="page.php?w=deamination">deamination</a> and <a href="page.php?w=DNA_fragmentation">fragmentation</a>) ancient DNA is more degraded in comparison with present-day genetic material. Genetic material has</p><p>
<a accesskey="3" href="page.php?w=ancient_DNA&amp;p=2">3.Next</a>
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