sister chromatid exchange test

例句：

1. 1.This test is used to detect the presence of a specific gene mutation in a family.
   这个试验用于检测一个特定基因突变在家族中的存在。
2. 2. The results of this test could help doctors make more accurate diagnoses.
   这个试验的结果可以帮助医生做出更准确的诊断。
3. 3.The sister chromatid exchange test is an important tool for genetic counseling.
   姐妹染色交换试验是遗传咨询的重要工具。