lethal gene(s)

例句：

1. 1. The study found that certain mutations in the lethal gene could lead to cancer.
   研究发现，某些致命基因的突变可能导致癌症。
2. 2. The researchers are trying to identify the lethal genes responsible for the disease.
   研究人员正在尝试识别导致这种疾病的致命基因。
3. 3. The lethal gene mutation is a rare but deadly condition that can be passed down through generations.
   致命基因突变是一种罕见但致命的状况，可以通过世代传递。