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高中生物中涉及的计算类型题不是很多,但在《遗传和变异》这一模块中计算却是大家公认的重点和难点,原因之一就是这一部分的计算题题型多,难度大,使很多学生产生了畏难心理。如果把数学公式和数学推理思维方法引入,就能大大地降低难度,使学生感到思路清晰,解题能力大为提高。有关的公式总结如下:1.2n①当n代表等位基因的对数或同源染色体的对数时(每对等位基因分别位于一对同源染色体上),产生配子的
There are not many types of computational problems involved in high school biology, but calculating and calculating in the module “Genetics and Variation” is one of the most important and difficult issues to be recognized. One of the reasons for this is that there are many computational problems and lots of difficulties in this part Students have a difficult psychology. If the mathematical formula and mathematical reasoning method introduced, can greatly reduce the difficulty, so that students feel clear thinking, problem solving skills greatly improved. The relevant formula is summarized as follows: 1.2n ① When n represents the logarithm of alleles or the logarithm of homologous chromosomes (each pair of alleles are located on a pair of homologous chromosomes respectively)