微核是细胞染色体受理化因子作用发生畸变所产生的片断,即DNA片断,其出现率与染色体畸变呈正相关。在肿瘤病因研究中,无论是肿瘤发生的体细胞突变学说,或肿瘤二阶段突变理论,都提示细胞染色体畸变和肿瘤发生有关。因而微核测定可 Micronucleus is a fragment of chromosome aberration induced by chromosome aberration, that is, DNA fragment. The incidence is positively correlated with chromosome aberration. In the study of tumor etiology, both the somatic mutation theory of tumor occurrence and the theory of two-stage tumor mutation suggest that the chromosome aberration and tumorigenesis are all related to cells. Thus micronucleus can be measured