Chromosome numbers which deviate from the normal number of chromosomes for a species are said to be heteroploid . 偏离了一个物种的整个染色体数目的叫做导倍体。
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The karyotye analysis was made on the 5th passage , the number of the chromosomes ranged from 187 to 200 , and no heteroploid cell was found 对第5代的传代细胞进行了遗传学分析，传代4次之后，其染色体形态正常， 4n为187一200之间，未发现明显的异倍化现象。
