英语语法分析

To investigate the incidence of sister chromatid exchange (SCE) and its influencing factors.

探讨影响姐妹染色单体互换(SCE)频率的因素。

Methods:Sister chromatid exchange(SCE) was sued in human lymphocytes and plant root tip cells.

方法：蚕豆、大麦和人外周淋巴细胞姐妹染色单体交换（SCE）。

The types of the structural chromosome aberration mainly were chromatid gap, chromatid break and deletion.

结构畸变类型主要是单体裂隙、单体断裂和缺失。