常染色体的平衡易位,由于总的遗传物质没有增加或丢失,故绝大多数个体可能不表现明显症状,仅少数患者表现精神发育迟缓。但如这种异常传给子女,将会出现某一染色体的部分三体或单体,并表现明显的病症,有的甚至不能存活。国外有关各种染色体部 The autosomal equilibrium translocation, as the total genetic material is not increased or lost, so the vast majority of individuals may not show obvious symptoms, only a small number of patients showed mental retardation. However, if such abnormalities are passed on to children, some trisomies or monomers of a chromosome will appear and show obvious symptoms, some of which may not even survive. Foreign related to a variety of chromosomes