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在对人教版必修二《遗传与进化》第五章“基因突变及其他变异”一轮复习教学中,发现几个易引起学生误解、误判的教学问题,答题时错误率较高.究其原因,一是学生阅读教材能力偏弱,理解过于片面;二是教材解释较为概括、简洁,学生提取信息能力较差,需要教师及时补充和拓展.一、DNA分子中发生碱基对的替换、增添和缺失,能否称作基因突变?1.基因突变的概念解析教材P81页用黑色加粗字给出了基因突变的概念:“DNA
In the review of teaching PEP 2 ”Genetics and Evolution“, Chapter 5 ”gene mutations and other mutations“, we found several teaching problems that may cause students’ misunderstanding and misjudgment. The reason, first, students weak reading ability, understanding is too one-sided; the second is the textbook explanation is more general, concise, students ability to extract information is poor, need teachers to replenish and expand in time. The replacement, add and delete, can be called genetic mutations? 1. Concept analysis of genetic mutations Textbook P81 gives the concept of gene mutation in bold black: ”DNA