But some aphids, katydids, lizards, geckos, and snakes only ever reproduce via parthenogenesis.

而有些蚜虫、、蜴、壁虎、蛇等只进行孤雌生殖。

The most likely explanation, something called parthenogenesis.

最可能的解释是一称为孤雌生殖的东西。

It's a product of parthenogenesis which means it was born from an unfertilized egg.

这繁殖叫孤雌生殖这就是说它由没有受过精的卵孵化而来。

Members of Brachionus plicatilis are not as sex-starved as that, but they still reproduce for the most part by parthenogenesis.

褶皱臂尾虫的成员并没有那么地“性饥渴”，但它们仍多半通过单性生殖进行繁殖。

For this sort of mutagenic work, however, parthenogenesis is an advantage.

然而，对于这突变工作来说，单性生殖是一优势。

In fact, some animals only ever undergo parthenogenesis, while others can reproduce both sexually and parthenogenetically.

实际上，有些动物只进行孤雌生殖，而另外一些则既可以进行有性繁殖，也能进行孤雌生殖。

In parthenogenesis, an embryo develops from an unfertilized egg cell that doubles its own chromosome count.

在孤雌生殖中，胚胎由未受精的卵细胞在染色体数目翻倍后发育而来。

Mayflies can sometimes default to parthenogenesis if there are no males available, which is especially handy because they've only got a day or so to reproduce before dying.

蜉蝣在没有雄性存在的条件下可以转为孤雌生殖，这便，因为它们在死亡前只有一天左右的时间进行繁殖。

In the summer, when food is abundant, pea aphids can rely on parthenogenesis, allowing their population to explode under favorable conditions.

在夏季食物充足的时候，豌豆蚜可以孤雌生殖，让群数量在有利环境中迅速膨胀。

Scientists also confirmed that parthenogenesis was taking place in some wild snake populations.

科学家们也发现，孤雌生殖还会在某些野生蛇类群中发生。

But some species that have sex cells can undergo a type of asexual reproduction called parthenogenesis — meaning " virgin origin" in Greek.

不过，一些具有性细胞的物可以进行一无性繁殖，即“孤雌生殖”，在希腊语中是“处女起源”的意思。

For parthenogenesis to happen, a chain of cellular events has to unfold.

为了实现单性生殖，必须发生一系列细胞事件。

Cultivated bananas reproduce asexually, through a process known as parthenogenesis, which literally means " virgin birth." Most plants have male and female flower-parts and seeds, that are pollinated with the help of things like the wind, or bees.

植的香蕉通过一称为孤雌生殖的过程进行无性繁殖，字面上的意思是“处女生育” 。 大多数植物都有雄性和雌性的花部以及子，这些子在风或蜜蜂的帮助下进行授粉。

Experts think this pregnancy may be the result of something called parthenogenesis, which is the type of asexual reproduction in which there is no genetic contribution by a male, or what many women refer to as best-case scenario.

专家认为这次怀孕可能是由于一名为单性生殖的现象，这是一无性繁殖的式， 其中没有雄性基因的参与，或者用许多女性的话来说， 这是最佳情景。

It's called parthenogenesis or virgin birth and it will make a brand new, a number of baby lizards and they're all females.

这叫做孤雌生殖或处女生育，它会产生一批全新的小蜴，而且它们全都是雌性的。

The problem with parthenogenesis is the offspring generally, you know, they only have that one set of DNA. So they're weaker.

单性生殖的问题是，后代通只有一组 DNA。 因此， 它们比较弱。

Through an asexual reproduction process called parthenogenesis.

通过一称为孤雌生殖的无性繁殖过程。

Parthenogenesis is a type of asexual reproduction where an embryo develops without previous fertilization.

孤雌生殖是一无性生殖，其中胚胎无需先前受精即可发育。

Scientists think parthenogenesis could be evolutionarily beneficial in some contexts because, well, sex can be a drag.

科学家们认为，孤雌生殖有时候在进化上更有利，因为交配可以成为一负担。

But this wasn’t a case of cloning or parthenogenesis -- sometimes called " virgin birth" -- neither of which requires sperm.

但这并不是克隆或孤雌生殖——有时被称为“处女生育”——这两式都不需要精子。