于人类周围淋巴细胞和啮齿动物的骨髓以及蚕豆根尖的不同组织和器官中,已研究微核的显示作为染色体断裂的指标。人类淋巴细胞的研究是重要的。利用这些细胞作为放射诱导染色体畸变的定量测定,亦作为人类接触化学物质的检测。微核是由无着丝粒的染色体断片或变松懈的染色体形成的。除主核外,在细胞间期的胞浆中能容易地见到一种小的清楚的核体。这些微核 Micronuclei have been studied as indicators of chromosomal fragmentation in different tissues and organs of lymphocytes and rodents around the human body and in different tissues and organs of Vicia faba. Research on human lymphocytes is important. The use of these cells as a quantitative measure of radiation-induced chromosomal aberrations also serves as a test for human exposure to chemicals. Micronuclei are formed by fragments of achromosome-free chromosomes or loosened chromosomes. In addition to the main nucleus, a small, clear nucleus can easily be seen in the cytoplasm of the intercellular space. These micronuclei