Klinefelter syndrome is still the most common chromosomaldisease, balanced translocation accounts for largest proportion of autosomal abnormality.
克氏症仍是最常见的染色体疾病,染色体平衡易位核型占常染色体异常核型比例最大。
2
Objective: To explore the practical value of Down's screening and antenatal diagnosis in preventing and decreasing chromosomaldisease and congenital birth defect.
目的:探讨唐氏筛查及产前诊断在预防和减少染色体病及先天缺陷儿出生的实用价值。
3
Caused by the abnormality of chromosome 21, Down syndrome is the most common chromosomaldisease as well as one of the most frequent known genetic causes of mental retardation.