本部分试题常以结构图、曲线图、柱形图为基础,以细胞周期中染色体和DNA的变化为主线,考查对细胞周期的理解、细胞分裂图像的识别与判断、细胞周期中染色体与DNA的变化规律等为主要内容。一、细胞周期图解只有连续分裂的细胞才具有细胞周期。一个细胞周期由分裂间期和分裂期组 This part of the test questions is often based on structural diagrams, graphs, and column diagrams, taking the chromosome and DNA changes in the cell cycle as the main line, examining the understanding of the cell cycle, the identification and judgment of cell division images, chromosomes and DNA in the cell cycle. The law of change is the main content. First, the cell cycle diagram only cells that are continuously dividing have cell cycle. One cell cycle consists of interphase and dissociation groups