During prophase 1, homologous chromosomes pair and exchange DNA (homologous recombination) .

在前期 1，源染色体配对并交换 DNA（源）。

But after recombination, the photons were free to fly.

但在后，光子可以自由飞行。

When the Universe was still ionized, prior to recombination, it was opaque.

当宇宙还处于电离状态时，在之前，它是的。

Known as the " era of recombination, " this stops electrons from recklessly pinging around.

这被称为“复合时代“，这使得电子再胡乱碰撞。

The other repair mechanism is called homology-directed repair which relies on homologous recombination.

另一种修复机制依赖于源，叫作源介导修复。

Pachytene This is the stage when homologous recombination, including chromosomal crossover (crossing over) , occurs.

粗线期这是发生源的阶段，包括染色体互换。

This process is also called genetic recombination.

这个过程也称为基因。

Every once in a while, pretty rare, due to an interesting recombination of genes, somebody is born with a tail.

偶尔，由于有趣的基因，有人生来就有尾巴，这很罕见。

Recombination is the random mixing of the DNA of two creatures.

合就是两种生物DNA的随机混合。

The other idea: recombination of ideas.

另一个想法：思想。

The second recombination occurs when a male inseminates a female.

第二次就是在雌性受精的时候。

Two very interesting factors come into play in this process: recombination and mutation.

合和突变。

And so a few that we thought we'd talk about are learning by doing and recombination of ideas.

因此，我们想讨论的几个问题是边做边学和思想的合。

Recombination occurs uniquely in each sex cell— making two sisters' chromosomes different not only from their parents', but from each other's.

在每个性细胞中发生的都是独一无二的——使两姐妹的染色体仅于她们父母的，而且也于彼此的。

Recombination happens before conception, so you get exactly half of your DNA from each parent, but going further back things get more complicated.

发生在受孕之前，所以你从每个父母那里得到恰好一半的 DNA，但再往前追溯，事情就会变得更加复杂。

Because of recombination, that number can be higher, though we don't know for sure how high— or it can as low as 0.

由于， 这个数字可能更高，尽管我们确定有多高——或者它可以低至 0。

This process is called recombination, and it means that every sperm or egg contains single chromosomes that are a unique mash up of each pair.

这个过程称为，它意味着每个精子或卵子都包含单个染色体，这些染色体是每对染色体的独特合。

Within the original host, let's say a duck, the virus may mutate over time: either independently, or by recombination with a gene segment from a different virus.

在最初的宿主中，比如一只鸭子，病毒可能会随着时间发生变异：要么是独立的，要么是与另一种病毒的基因片段。

It is the endless recombinations of our genomes - each nearly identical, but not quite - that make us what we are, both as individuals and as a species.

正是我们基因的断——每个基因大体上相，而又完全相，使得我们成为现在这个样，既是许多个体，又是一个物种。

You inherit 25% of each grandparent's DNA. However, this process of recombination means that inevitably some of their genetic make-up will be lost along the way.

您继承了每位祖父母 25% 的 DNA。 然而，这种过程意味着他们的一些基因成可避免地会在此过程中丢失。