高中生物必修第二册第六章遗传的基本定律中有关种类、比例和概率的计算,比较抽象,一直是学生学习的难点,也是教学的难点。其实这些计算的规律性很强,只不过学生没有找到而已。我专门设计了这节课帮助学生解决这一问题。这节课一开始我是这样设计的:“同学们,今天我这位生物老师来给大家上一节数学课。”大家一听,感到非常迷惑,一个个交头 The calculation of the types, proportions, and probabilities in the basic laws of the sixth chapter of high school biology, the second chapter of the book, is relatively abstract, and it has always been a difficulty for students to learn, and it is also a difficult point for teaching. In fact, the regularity of these calculations is very strong, but the students did not find it. I specially designed this class to help students solve this problem. At the beginning of this class, I designed it like this: “My classmates, today my biology teacher has come to give you a math lesson.” Everyone heard it and was very confused, one by one.