摘要拷贝数变异(copy number variation,CNV)是当前国际研究的热点,它是一种大小介于1kb到3Mb之间的DNA片段的缺失、重复、倒位和易位,在人群和基因组中都分布广泛,被认为是个体间基因差异的重要来源。本文从CNV在人类基因组中的存在、形成机制、对疾病和表型的影响、检测和分析以及前景等方面综述了CNV的研究进展。
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