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“短板”梳理由《考试大纲》可以看出,五个知识点中有两个的要求都是II级,而此部分内容正是考生学习的薄弱环节。结合近几年高考试题发现,这部分知识的考查重基础、重理解、重应用,考生在复习的过程中,要注重夯实基础,形成知识网络。生物的变异分为可遗传变异和不可遗传的变异,可遗传变异包括基因突变、基因重组和染色体变异,可遗传的变异部分又与进化、育种紧密联系。
“Short Board ” Combing It can be seen from the “Exam Outline” that two of the five knowledge points are required to be Level II, and this part is the weak point of the candidate's study. Combined with the entrance examination papers in recent years found that part of the examination of knowledge-based, re-understanding, re-application, candidates in the review process, we should lay a solid foundation to form a knowledge network. Biological variation is divided into heritable and non-heritable variation. Heritable mutations include gene mutation, gene recombination and chromosomal variation. Heritable variation is closely linked with evolution and breeding.