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新课标关于评价建议中的纸笔测验要求:命题时强调“核心内容”。而遗传变异是高中生物教材的核心内容,因而有关遗传概率的计算问题在高考试卷中的位置也就不言而喻了。在平时的复习及练习中,我们也经常遇到此类试题。对此类题学生经常犯错误,究其原因不外乎分析不到位,思路混乱。现针对这一情况,对如下一个可被视作遗传中概率计算“公式”的题目作一透析。
The new curriculum standard on the evaluation of paper and pencil test requirements: the proposition emphasizes “core content ”. Genetic variation is the core content of high school biology textbooks, so the calculation of genetic probabilities in the entrance examination papers in the position is self-evident. In the usual review and practice, we also often encounter such questions. Students often make mistakes on such issues, the reason is nothing more than analysis is not in place, ideas confusion. In response to this situation, the following one can be regarded as genetic probability calculation “formula ” subject to a dialysis.