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一个生物狗的科普小园|没检测出DNA就是性侵证据不足吗?
DNA的序列是ATCG四种碱基来构成的,比如在人类基因组的某个位置上出现了AGAGAG这样的重复,这就是一个STR。 STR的特点是人群内有极大的多样性。
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