meiosis I

例句：

1. 1. During meiosis I, chromosomes are divided into two equal parts.
   在减数分裂I期，染色体被分成两个相等的部分。
2. 2. Meiosis I is the first stage of mitosis in animals and plants.
   减数分裂I是动物和植物有丝分裂的第一个阶段。
3. 3. In meiosis I, homologous chromosomes pair together to form chromatids.
   在减数分裂I中，同源染色体配对形成染色单体。