When we look at images of human chromosomes, next to those of other apes, they line up nearly identically.

当我们观察人类染色体和其他类人猿染色体的图像时，它们的排列非常相像。

Sometime during our species' history, those two chromosomes that are still separate in other apes were welded to become our single human chromosome 2.

而是在人类历史的某个时间段这两条在其他猿类中至今仍然是分开的染色体被连接在一起，形成了我们的 2 号染色体。

And in the case of human chromosomes, geneticist Melissa Wilson broke it down for me like this.

就人类染色体而言，遗传学家 Melissa Wilson 像这样为我分解了它。

In a paper published this week in Nature Genetics, a team of 42 international researchers performed a huge study of variations in the human Y chromosome.

在本周发表在《自然遗传学》(Nature Genetics) 上的一篇论文中，一个由 42 名国际研究人员组成的团队对人类 Y 染色体的变异进行了大规模研究。