过去,人们对化学物质诱发的染色体异常主要着眼于结构畸变,而对其诱发染色体数目改变研究较少,至于对生殖细胞染色体数目损伤的研究则更为罕见。具有结构畸变染色体的细胞可能有三种前途:其一,畸变染色体随细胞的发展丢失,因而子细胞的染色体数减少,即形成了非整倍体细胞;其二,这样的细胞因基因缺失过多或因基因间相互位置改变造 In the past, people focused on structural abnormalities in the chromosomal abnormalities induced by chemical substances, but few studies on the changes in the number of chromosomes induced by them were carried out. However, studies on the number of chromosomes in germ cells were even rarer. Cells with structurally aberrant chromosomes may have three promising prospects: First, the aberrant chromosomes are lost as the cells develop, so the number of chromosomes in the daughter cells decreases, forming aneuploid cells. Second, there are too many gene deletions Or because of changes in the position between genes made