The X chromosomes were all submeta - centric and the Y chromosomes were acrocentric in five breeds.

X染色体均为近中着丝粒染色体,Y染色体为近端着丝粒染色体.

Most women have two X chromosomes while most men have one X and one Y.

绝大多数女性拥有两条X染色体，而男性拥有X、Y染色体各一条。

But that creates a problem for people with two X chromosomes.

但是这给拥有两条X染色体的人带来了问题。

This happens early in development when an embryo with two X chromosomes is just a ball of cells.

这个过程在胚胎发育初期产生，此时的胚胎只是一团细胞。

The gene products encoded by two X chromosomes of female individuals are nearly identical to those encoded by one X chromosome of male individuals.

雌性两条X染色体编码的基因产物，与雄性一条X染色体编码的基因产物基本相同。

There is a rare condition known as Turner's Syndrome where a genetic female (XX) is missing one of the X chromosomes and she is known as an XO girl.

有一种罕见的疾病叫作“特纳氏综合症”（Turner's Syndrome）。 患有这种疾病的女性，性别基因（XX）缺失了一条染色体X，所以也被称为XO女孩。

From what you eat and drink to where you live, there's a special sickness lying in wait just for you if you have the misfortune to have two X chromosomes.

如果很不幸你的基因是由两个X染色体组成，那么从你吃喝的东西到你生活的地方，这儿都有个专门的疾病在静静地等待着你。