That's because the gene that's responsible for making G6PD is on the X chromosome.

这因为X体基因决定G6PD。

Now males males have one X and one Y chromosome, and females have two X chromosomes.

那么，男性有一个X体和一个Y体，女性有两个X体。

Klinefelter syndrome develops when a gamete, either sperm or egg, contains at least one extra X chromosome.

异常配子时期就存，子和卵子都有可能发生，异常的配子会多出至少一条X体。

In some cases, it's linked to chromosomal abnormalities like Turner syndrome, where an X chromosome is missing.

某些情况下，它与体异常有关，如Turner综合征，其X体缺失。

Since this is linked to the X chromosome, both Duchenne and Becker muscular dystrophy are called X-linked recessive.

由于发病与X体有关联，DMD和BMD被称为X连锁隐性遗传。

In females, though, only one X chromosome gets expressed, and the other is inactivated, called X-inactivation or lyonization.

女性只有一条X体表达，而另一条失活，这就X体失活（莱昂化）。

The least common karyotype in Turner syndrome is where there's only a part of the X chromosome missing.

特纳综合征中最不常见的核型X体只有部分缺失。

The most common cause of primary amenorrhea is Turner syndrome, where one X chromosome is either completely or partially absent.

最可能的原发性闭经原因Turner综合征：有一个X体完全或者部分缺失。

Turner syndrome is a chromosomal disorder where one X chromosome is either completely or partially absent.

特纳综合征一种体疾病，患者体内细胞中有一条X体完全或部分缺失。

Either way the separation doesn't happen and the end result is a gamete with an extra X chromosome.

不管哪种情况，都发生不分离的现象，最后的结果都产生多一条X体的配子。

This means females can have two colors, in addition to white, because they have two " X" chromosomes.

这表示母猫除白之外还可以拥有两种颜，因为它们有两条 X 体。

In the 1960s, biologist Susumu Ohno suggested the X chromosome would evolve slowly, and thus remain similar in most mammalian species.

60年代的时候，生物学家Susumu Ohno提出X体进化缓慢，大多数哺乳动物的X体基因相似的。

Monosomy is what happens in Turner syndrome and it specifically affects the X chromosome.

造成特纳综合征的原因就单体，并且单体情况仅影响X体时。

Because if you got your father's " X" chromosome you would be a female.

因为如果从父亲那得到 X 体，那你就会女性。

Studies show that the most influential hair-loss gene is located on the " X" chromosome only.

研究显示造成秃头的基因位于 X 体上。

The fur color gene is located on the " X" chromosome.

毛基因位于 X 体上。

Klinefelter syndrome is diagnosed with a karyotype which visualizes each chromosome including the X, Y, and extra X chromosomes.

核型分析可观察到患者的每条体，包括X、Y与额外的X体，可用来确诊Klinefelter综合征。

So if your mother does express these traits it means she will be passing an affected " X" chromosome to you.

因此如果你的母亲秃头，你就一定会得到秃头基因。

The most common karyotype is 45, X, which means the person has 45 chromosomes, of which only one is an X chromosome.

最可能的核型45，X，意味着这个人有45条体，只有一条X体。

In fact, each additional x chromosome increases the estrogen to testosterone ratio, making the changes even more striking.

事实上，每多一条X体，雌激素与睾酮的比值就会变大一些，Klinefelter综合征的病征也会更明显一些。