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

这X色体基决定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色体和一个Y色体，女性有两个X色体。

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

异常在配子时期就存在了，精子和卵子都有可能发生，异常的配子会多出至少一条X色体。

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

在某些情况下，它与色体异常有关，如Turner征，其X色体缺失。

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色体有关联，DMD和BMD被称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色体表达，而另一条失活，这就X色体失活（莱昂化）。

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

特纳征中最不常见的核型X色体只有部分缺失。

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Turner征：有一个X色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.

特纳征一种色体疾病，患者体内细胞中有一条X色体完全或部分缺失。

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，都发生了不分离的现象，最后的结果都产生了多一条X色体的配子。

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

这表示母猫除了白色之外还可以拥有两种颜色，它们有两条 X 色体。

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色体进化缓慢，大多数哺乳动物的X色体基相似的。

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

造成特纳征的原就单体，并且在单体情况仅影响X色体时。

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

如果从父亲那得到 X 色体，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位于 X 色体上。

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

毛色基位于 X 色体上。

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色体，包括X、Y与额外的X色体，可用来确诊Klinefelter征。

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

此如果你的母亲秃头，你就一定会得到秃头基。

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条色体，只有一条X色体。

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色体，雌激素与睾酮的比值就会变大一些，Klinefelter征的病征也会更明显一些。