And this first one would be crossing over.

机制是染色体交叉互换。

This is when an individual's chromosomes, which are are inherited from each of the parents, cross over one another, enabling genes from one chromosome to swap places with genes from another.

这是当从每父母那里继承的体染色体相互交叉时，使染色体的基因能够另染色体的基因交换位置。

First one is crossing over during meiosis.

是减期间的染色体交叉互换。

To put it simply, during meiosis, the process in which gametes[3] are created, chromosomal crossover occurs.

简而言之，在减过程中， 即产生配子 [3] 的过程中，会发生染色体交叉。

But if we didn't have crossing over, all the genes that are found on that one chromosome, which is you know hundreds of genes, would just kind of travel together through time.

但如果我们没有染色体交叉互换，那么位于同条染色体上的所有基因，你知道的， 有百基因，就会随着时间的推移而起移动。

On top of, and here we also see crossing over occurring right there.

此外，我们还可以看到染色体交叉互换正在此处发生。

And in crossing over what happens is the homologous chromosomes, in other words the chromosome from dad and the chromosome from mom, will actually wrap around each other and they'll share some of that information.

在染色体交叉互换过程中， 同源染色体，也就是来自父亲的染色体和来自母亲的染色体，会实际缠绕在起并交换部信息。