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

在前期 1，染色体配对并交 DNA（重）。

But after recombination, the photons were free to fly.

但在重后，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，在重之前，它是不透明的。

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

这被称为“复合时代“，这使得电子不再胡乱碰撞。

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

另一种修复机制依赖于重，叫介导修复。

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

粗线期这是发生重的阶段，包括染色体互。

This process is also called genetic recombination.

这个过程也称为基因重。

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

偶尔，由于有趣的基因重，有生来就有尾巴，这很罕见。

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

重新合就是两种生物DNA的随机混合。

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.

重新合和突变。

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重都是独一无二的——使两姐妹的染色体不仅不于她们父母的，而且也不于彼此的。

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

重发生在受孕之前，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.

由于重， 这个数字可能更高，尽管我们不确定有多高——或者它可以低至 0。

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重。

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.

这个过程称为重，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。

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.

正是我们基因的不断重——每个基因大体上相，而又不完全相，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，这种重过程意味着他们的一些基因成不可避免地会在此过程中丢失。

We sometimes call it an atavism, and that term is usually used for something that has missed a few generations or something that pops up due to an interesting recombination of genes.

我们有时称之为返祖现象，该术语通常用于指错过几代的东西或由于有趣的基因重而弹出的东西。

But, given time and genetic recombination, says Dr Campbell-Staton, evolution might disentangle the mutation for tusklessness from the maladaptive mutations in its neighbouring genes, opening the door for males to shed their tusks, too.

但是，坎贝尔-斯塔顿博士说，经过一定的时间和基因重，进化可能会将无牙突变从邻近基因的不适应突变中解脱出来，也为雄性打开无牙的大门。