Philadelphia chromosome

例句：

1. 1.The Philadelphia chromosome is a genetic mutation that causes cancer in certain individuals.
   费城染色体是一种遗传突变，会导致某些个体患癌症。
2. 2.The Philadelphia chromosome has been identified as a cause of leukemia in some patients.
   费城染色体已被识别为某些患者白血病的原因。
3. 3. Researchers are studying the Philadelphia chromosome in hopes of finding a cure for leukemia.
   研究人员正在研究费城染色体，希望找到治疗白血病的方法。