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下图1是典型的细胞分裂过程中DNA含量的变化曲线。横轴表示细胞分裂时期,纵轴表示DNA的含量。纵轴的标注方法比较复杂,根据统计,大概有以下三种标注方法:①纵轴标注为“核中DNA含量”;②纵轴标注为“每条染色体DNA含量”;③纵轴不作任何标注,或只笼统标注为“DNA相对含量”、“DNA含量”。
Figure 1 below is a typical curve of DNA content changes during cell division. The horizontal axis indicates the cell division period, and the vertical axis indicates the DNA content. The labeling method on the vertical axis is more complicated. According to statistics, there are probably the following three labeling methods: 1 vertical axis labeled as “DNA content in the nucleus”; 2 vertical axis labeled as “DNA content per chromosome”; 3 longitudinal Axis does not make any annotation, or is only generally labeled as “DNA relative content” and “DNA content”.