摘要
对５４例智力低下患者进行染色体核型分析发现１５例染色体异常，异常检出率为２５９％；其中１３例为Ｄｏｗｎ’ｓ综合征，２例为Ｔｕｒｎ’ｓ综合征。我们从遗传学角度探讨了智力低下儿的病因可能与生殖细胞老化、环境致畸等因素有关。
Chromosomal nuclei in 54 cases of mental retardation have been analyzed and 15 anomalous chromosomes (anomalous rate is 25%) have been found, 13 cases are Down's syndrome, and 2 cases Turner's syndrome. In genetics, etiology of mental retardation may be related to senescence of germinal cell and anomalous fetus by environment.
关键词
智力迟钝
染色体
核型
遗传学
MeSH mental retardation
chromosomes, human
raryotyping
genetics
