1. an abnormality involving a chromosome number that is not an exact multiple of the haploid number (one chromosome set is incomplete). 
   染色体数量不整被增长的不正常状态。
2. Any of several hereditary blood-coagulation disorders in which the blood fails to clot normally because of a deficiency or an abnormality of one of the clotting factors. Hemophilia, a recessive trait associated with the X-chromosome, is manifested almost exclusively in males. 
   血友病遗传性血凝病中的任何一种，由于某个凝血因子的功能丧失或紊乱而造成血液不能正常地凝结成块。作为与ｘ染色体相关联的隐性性状，血友病几乎全都出现在男性患者身上
3. A chromosome that is not a sex chromosome. 
   常染色体非性染色体的一个常染色体
4. abnormality in performing voluntary muscle movements. 
   不能正常进行肌肉的运动。
5. an exchange of chromosome parts. 
   染色体各部分间的互换。

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• 1. 染色体异常
  亦可能为突变...染色体异常 chromosome abnormality...单一基因异常 single gene disorder
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• 2. 染色体结构异常
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