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，生殖细胞会复制原先体，复制完毕后，所有体都有了姐妹单体。

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

通过这个视频，你现在应有丝分裂是细胞为了生长和修复或无性生殖而分裂过程。

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殖隔离种群。

Remember meiosis only deals with making sex cells in reproduction.

记住，减数分裂只与生殖过程中产生性细胞有关。