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21三

21三

21三

21三

2

Derivation of a formula for determination of proportion of paternal trisomy 21 is presented.

推导公式确定比例的父亲是 21 三体。

3

Objective Cytogenetics method was analysed in Mongolian idiocy and the reason which induce the disease.

目的用细胞遗传学方法分析 21 三体综合征患者的染色体核型及其病因。

4

Down syndrome (trisomy 21 ) is a disorder caused by the presence of an extra 21st chromosome .

唐氏综合症（21 三体综合症）是由于患者额外多了一条 21 号染色体所致的疾病。

5

Down's syndrome or trisomy 21 occurs in around 1 in 800 births and older women are at higher risk.

唐氏综合症又称 21 三体综合症，发生率大约在八百分之一，产妇年龄越大，发病率越高。

6

Rapid detected of trisomy 21 syndrome by gene diagnosis techniques

快速检测 21 三体综合征基因诊断方法的研究

7

The use of the primed in situ labeling technique in the diagnosis of 21 -trisomy syndrome

引物原位标记技术在 21 -三体综合征诊断中的应用

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