一、教学目标知识目标辨析细胞增殖示意图,理解染色体数目和形态的动态变化,分析DNA和基因在细胞分裂过程的变化.能力目标通过判断细胞增殖的示意图所处的时期,进一步培养学生抓住核心概念的能力,培养识图、绘图以及比较分析和归纳总结的能力.二、教学过程1.温故知新,导入新课给学生播放有丝分裂和减数分裂的快速视频,3分钟为宜.利于学生快速回忆细胞增殖的过程,同时启发学生抓住核 First, the teaching objectives of knowledge Objective differentiation of cell proliferation diagram to understand the dynamic changes in the number and morphology of chromosomes, DNA and gene analysis in the process of cell division changes in ability to target by judging the timing of the cell proliferation diagram to further train students to grasp the core The concept of ability, training plan, drawing and analysis and summarize the ability to analyze and summarize. Second, the teaching process 1. Cure new, into the new lesson to students to play quick video of mitosis and meiosis, 3 minutes is appropriate. Cell proliferation process, while enlightening students to grasp the nuclear