抄録
In a recent decade, human cytogenetics has been developed very rapidly with advancement of tissue culture technique. This review introduces the basic mechanism of chromosome aberrations in human somatic cells, especially, leucocytes and relationship between abnormalities and irradiation. However, our knowledge about relationship between dose of radiation and quantity of chromosome aberration is not enough to clearly explain. Also it is the problem which will be studied in near future to clarify the causation of leucemia and other disorders.
