辐射和许多化学物质能诱发突变已为大家所熟知。本文着重报道了经X线和脲酯处理ICR系亲鼠,获得的遗传性肿瘤显著增加的材料。大约诱发肿瘤的90%在肺内,并且似乎有约40%外显率的显性突变是经遗传获得的。根据有关鼠肺的报道,如果种系突变可导致遗传性肿瘤,那么,组成器官的任何细胞都可能发生变异,并均有形成肿瘤的可能性。父母受X线照射其后代所诱发的突变,很可能受年龄,自然界致癌剂,食物中的促发物和环境等的影响。如果这种假 It is well known that radiation and many chemicals can induce mutations. This article focuses on reports of significant increases in hereditary tumors obtained from X-ray and urea ester treatment of ICR lineages. About 90% of the tumors are induced in the lung, and dominant mutations that appear to have a penetrance of about 40% are inherited genetically. According to reports on rat lungs, if germline mutations can cause hereditary tumors, then any cells that make up the organ may mutate and have the potential to form tumors. The mutations induced by parents’ X-ray exposure to their offspring are likely to be affected by age, natural carcinogens, food priming agents, and the environment. If this kind of fake