Objective To detect human chromosome 21 rapidly.
目的探索快速检测21号染色体的方法。
And a gene called KCNJ6, located on chromosome 21, is known to make GIRKs.
而叫做KCNJ6的基因，被发现在染色体21上，已知会产生GIRKs。
Often, the error resulted in an extra copy of chromosome 21, which causes Down's syndrome.
通常情况下，错误导致21号染色体的多余复制，引发唐氏综合症。
Scientists have long suspected that such genetic benefits might accrue from having an extra chromosome 21.
科学家更深入地推测，这些基因上的益处也许能在那条额外的21号染色体上获得增加。
Caused by the abnormality of chromosome 21, Down syndrome is the most common chromosomal disease as well as one of the most frequent known genetic causes of mental retardation.
唐氏综合症由人体21号染色体病变引起。它是最常见的染色体疾病，也是最主要的导致智力落后的基因病变。
Objective to search the forming cause and the correlation between the clinical phenotype and chromosome band by the cytogenetic analysis on a case of ring chromosome 21 syndrome.
目的通过对1例21号环状染色体综合征患者的细胞遗传学分析，探讨21号环状染色体的形成原因，临床表型与染色体区带的关系。
For example, if the haploid number is 7, the euploid number would be 7, 14, 21, 28, etc, and there would be equal Numbers of each different chromosome.
例如，一种生物单倍体染色体数目是7，整倍数将是7、14、21、28等数目，并且每条不同的染色体有相等的数目。
Objective: a few trisomy 21 cells in normal chromosome karyotype was been observed for study of the correlation of clinical phenotype and development damage in sick children of Down's syndrome.
目的观察正常细胞核型中含有极少量21 -三体细胞的患儿临床表型及发育损害的相关关系。
Results 43/69 astrocytomas were found to be abnormal chromosome clones, including 12/25 astrocytomas, 15/21 anaplastic astrocytoma, and 16/20 glioblastoma respectively.
结果12／25 的星形细胞瘤， 15／21间变型星形细胞瘤和16／20 的多形胶质母细胞瘤存在染色体数量上的变异。
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。
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。
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