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姐妹染色单体互换(SCE)是一条染色体两条姐妹染色单体之间的同源片断的互换。这种互换技术为深入研究染色体的分子结构、DNA复制、DNA损伤、修复以及细胞周期等重要问题提供了新的研究工具。
Sister chromatid exchange (SCE) is an interchange of homologous segments between two sister chromatids of a chromosome. This interchangeable technology provides a new research tool for further research on important issues such as molecular structure, DNA replication, DNA damage, repair and cell cycle.