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人类基因组中存在DNA重复序列，包括了多态性DAN片段，其多态性决定于DAN串联重复序列（variblenumbertandemrepeats，VNTR）。DNA多态性的检测方法有用South－ern印迹杂交进行限制性片段长度多态性（re－strictionfragmentlengthpolymorphism，RFLP）分析，以及聚合酶链式反应
There are DNA repeats in the human genome, including polymorphic DAN fragments, whose polymorphisms are determined by the DNA tandem repeats (VNTRs). DNA polymorphism detection method using South-ern blot hybridization for restriction fragment length polymorphism (RFLP) analysis, and polymerase chain reaction