chromosome reduction

例句：

1. 1. Chromosome reduction is a process thatoccurs during the formation of gametes insexual reproduction.
   染色体减少是一个在有性生殖过程中形成配子时发生的过程。
2. 2. Inhumans, the number of chromosomes canvary depending on the type of cell andthe stage of development.
   在人类中，染色体的数量可以根据细胞类型和发育阶段而变化。
3. 3. Chromosome reduction is animportant mechanism for genetic variation and adaptation inmany species.
   染色体减少是许多物种中遗传变异和适应机制的重要途径。