Remember meiosis only deals with making sex cells in reproduction.

记住，减数分裂只与生中产生性细胞有关。

From this video, you should now know that mitosis is how cells divide in order to grow and repair, or for asexual reproduction.

通这个视频，你现在应知道有丝分裂是细胞为了生长和修复或无性生而分裂的。

Early on in meiosis the germ cell makes a copy of all of its chromosomes with each chromosome having sister chromatids at that point.

减数分裂早期，生细胞会复制原先的染色体，复制完毕后，所有的染色体都有了姐妹染色单体。

In other words when one species becomes two that species is evolving or changing or separating into two populations that are reproductively isolated.

换句话说，当一个物种变成两个时，这个物种正在进化、变化或分裂成两个生隔离的种群。