bivalent chromosome

例句：

1. 1.The study of genetics is crucial for understanding the mechanisms of reproduction and disease.
   遗传学的研究对于理解生殖和疾病机制至关重要。
2. 2. In humans, the bivalent chromosomes are responsible for the formation of the sex cells.
   在人类中，双价染色体负责形成性别细胞。
3. 3. The bivalent chromosomes play a crucial role in the development of the human body.
   双价染色体在人体发育过程中起着关键作用。