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单词 fragile X syndrome
释义 fragile X syndromen.(名词)
  1. An inherited disorder caused by a defective gene on the X-chromosome and causing mental retardation, enlarged testes, and facial abnormalities in males and mild or no effects in heterozygous females. It is the most common inherited cause of mental retardation.X染色体脆弱症候群:由有缺陷的X染色体造成的遗传缺陷,会造成男性的智力障碍、睪丸过大和颜面畸形,对异型接合子的女性影响轻微甚至没有。可说是典型的智障遗传疾病
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