What's the difference between a gamete and a zygote?

生殖胞受精卵的区别是什么？

Work is already under way to develop principles for editing reproductive cells.

编辑生殖胞的原则制定工作已经开始。

Another, they're releasing reproductive cells called spores.

后来，它们又释放一种叫做孢子的生殖胞。

So, a germ cell ovarian cancer refers to situations where these precursor germ cells become cancerous and form tumors.

因此，卵巢生殖胞癌就是指位于卵巢的生殖胞癌变形成的肿瘤。

Its stable temperature and high density help preserve and disperse reproductive cells.

稳定的温度较高的密度有助于保存生殖胞。

" FYI this is probably the first human germ line editing, " Dr. Quake wrote.

“谨供参考：这可能是人生殖胞的首次编辑，”奎克写道。

Many algae, for example, have sex cells that are indistinguishable in size.

例如，许的生殖胞大小难以区。

This is possible because organisms evolve when random mutations happen in the DNA of reproductive cells.

这是可能的，因为当生殖胞的DNA发生随机突变时，生物就会进化。

Unless land organisms return to the water to reproduce or have specially adapted sex cells, their options are limited.

除非陆地生物回到水中繁殖或有特别适应的生殖胞，否则它们的选择是有限的。

It does not always involve strictly female and male individuals with differently sized sex cells that fuse internally.

它并不总是严格涉及拥有不同大小内部融合的生殖胞的女性男性个体。

Histologically, prominent features include large, round tumor cells resembling germline tumors; or small cells forming Homer-Wright rosettes.

松果体瘤主要的组织学特征包括似生殖胞肿瘤中巨大圆形的肿瘤胞，或是形成Homer-Wright菊形团的小胞。

And, each follicle is made up of a germ cell, also known as an oocyte, which is the immature egg.

每一个卵泡都由一个生殖胞组成，也就是卵母胞，就是未成熟的卵子。

These are the most common germ cell tumor in children, and the tumors can be very aggressive.

这是最常发生于儿童身上的生殖胞瘤，肿瘤侵袭性较强。

However, each reproductive cell has only 23 individual chromosomes.

然而，每个生殖胞只有 23 条独立的染色体。

Germ cells, as they're called, developed inside a fortress-like structure within the testes.

这些所谓的生殖胞是在睾丸内一个似堡垒的结构内发育的。

Some originate from ovarian germ cells, such as mature cystic teratomas, also called dermoid cysts.

有的起源于卵巢生殖胞，例如成熟的囊性畸胎瘤，又名皮样囊肿。

The other option is the sister chromatids of the x chromosome don't separate in meiosis two in the female germ cell.

女性生殖胞中，X染色体姐妹染色单体在第二次减数裂时没有离。

Ferns, for example, reproduce from spores and need damp environments for their reproductive cells to reach each other.

例如，蕨植物从孢子中繁殖，它们的生殖胞需要潮湿的环境才能相互接触。

The macronucleus controls the non-reproductive cell functions, like eating, movement, and digestion and the micronucleus is necessary for reproduction.

大核控制非生殖胞功能，如进食、运动消化， 而微核是繁殖所必需的。

This happens around half-moons, when weaker tides calm the water's surface, creating the perfect conditions for their sex cells to couple up.

这发生在半月时候，当较弱的潮汐让海面平静，为它们的生殖胞配对创造了完美的条件。