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笔者在多年的教学中不断探索、研究,对习题进行归类、整理,找出解题思路、方法和规律,使学生达到举一反三,触类旁通的效果.下面就以基因自由组合定律为例,来谈谈笔者在这部分内容中的教学思路.基因自由组合定律适用于两对及两对以上相对性状的遗传.在实验中,F2中出现了黄圆、绿圆、黄皱、绿皱四种表现型,且符合9∶3∶3∶1的比例.而在
After years of teaching, the author constantly explores, studies and classifies and arranges the exercises to find out the solutions, methods and rules so that students can achieve the goal of giving top priority to others and bypassing the analogy. On the part of the author in this part of the teaching ideas.Group free combination law applies to two pairs and more than two pairs of relative genetic inheritance.In the experiment, F2 appeared yellow circle, green circle, yellow wrinkle, green wrinkle four kinds of performance Type, and in line with 9: 3: 3: 1 ratio