B chromosome

例句：

1. 1.The B chromosome is responsible for the person's height.
   B染色体负责这个人的身高。
2. 2. The B chromosome carries a gene that causes cancer.
   B染色体携带一个导致癌症的基因。
3. 3. The B chromosome is different from the A and C chromosomes in humans.
   B染色体与人类的A和C染色体不同。