Fragile X syndrome, a single genetic mutation on the X chromosome, is the most common source of inherited mental impairment, affecting one in every 4,000 boys and one in every 6,000 girls.
脆性X综合征，一个X染色体上的基因突变，是遗传性智力障碍最常见的来源，每4000名男孩和每6000名女孩中就有一名儿童患有该症。
Fragile X syndrome, a single genetic mutation on the X chromosome, is the most common source of inherited mental impairment, affecting one in every 4, 000 boys and one in every 6, 000 girls.
脆性X综合征，一个X染色体上的基因突变，是遗传性智力障碍最常见的来源，每4000名男孩和每6000名女孩中就有一名儿童患有该症。
People who inherited the mutations are much more likely to develop restless leg syndrome, the researchers report in the journal PLoS Genetics.
最近，科学家发现，两种基因突变和不宁腿综合征（restlessleg syndrome ，RLS）有关，遗传这种基因突变的人更容易发生不宁腿综合征。
What's particularly special about these cells is that they came from a patient with one of the inherited forms of long QT syndrome.
这些细胞最特别之处在于，它们来自于一位遗传性QT间期延长综合症患者。
Congenital long QT syndrome is a group of familial inherited disease.
先天性Q- T间期延长综合征是一组家族遗传性疾病。
Hunter syndrome, known more formally as mucopolysaccharidosis type II or MPS II, is an extremely rare inherited enzyme disorder that occurs almost exclusively in males.
亨特氏综合症是二型粘多糖沉积病(MPSII)，是一种极其罕见的遗传性酶紊乱疾病，发病者基本只有男性。
Hunter syndrome, known more formally as mucopolysaccharidosis type II or MPS II, is an extremely rare inherited enzyme disorder that occurs almost exclusively in males.
亨特氏综合症是二型粘多糖沉积病(MPSII)，是一种极其罕见的遗传性酶紊乱疾病，发病者基本只有男性。
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