有两种罕见的家族遗传病致病基因分别位于常染色体和性染色体上一种是先天性代谢病称为�尿病病人的尿在空气中一段时间后就会变�另一种因缺� Template




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tomski有两种罕见的家族遗传病致病基因分别位于常染色体和性染色体上一种是先天性代谢病称为�尿病病人的尿在空气中一段时间后就会变�另一种因缺� coloring