遗传和变异是生物界普遍存在的极其复杂的生命现象，是学生最感兴趣的问题，也是整个高中（生物）教学的重点和难点。而”生物的遗传”又是理解“生物的变异”的基础，怎么教和怎样引导学，一直是生物学教师的热门话题。我认为除了做好常规教学外，尤其要注意理清知识结构，分 Genetics and mutations are extremely complex life phenomena that are common in the biosphere. They are the most interesting issues for students and are the focus and difficulty of high school (biological) teaching as a whole. The “genetic inheritance” is also the basis for understanding “biological variation”. How to teach and how to guide learning has always been a hot topic of biology teachers. I think that in addition to doing regular teaching, we must pay special attention to clarifying the knowledge structure.