About the control group, the chromosome aberration rate of is 1.55%; the fragile site expression rate is 0.89%.Both the chromosome aberration rate and the fragile site expression rate of two groups are distinct from each other(P＜0.01).
About the control group, the chromosome aberration rate of is 1.55%; the fragile site expression rate is 0.89%.Both the chromosome aberration rate and the fragile site expression rate of two groups are distinct from each other(P＜0.01).
结果：精神发育迟滞者染色体的畸变率为4.32％，脆性部位的表达率为2.18%，而正常对照组染色体畸变率为1.55％，脆性部位的表达率为0.89％，两者的染色体畸变率和脆性部位表达率有明显的差异(P＜0.01)。