Methods: Using the peripheral blood lymphocyte chromosome preparation technique and fragile site technique, to analyze chromosome aberrtion rate and fragile site expression rate of 30 cases of mental retardation sufferer and 30 cases of normal person resp
Methods: Using the peripheral blood lymphocyte chromosome preparation technique and fragile site technique, to analyze chromosome aberrtion rate and fragile site expression rate of 30 cases of mental retardation sufferer and 30 cases of normal person resp
方法：采用外周血淋巴细胞染色[摘要]目的：探讨精神发育迟滞者与染色体畸变率和脆性部位表达率的相关性。