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在学习生物的遗传时,常涉及多对等位基因控制一对相对性状的不完全显性问题,多倍体产生配子种类及比例问题.有些教师反复讲解,学生仍不理解,面对相关习题、试题,总感觉无从下手.本人在教学过程中把数学的“组合法”引入遗传学教学,收到了事半功倍的效果,简单介绍如下:一、根据亲本(或亲代)的基因型,求子代表现型的分离比例1某试验动物黑毛与白毛由两对同源染色体上的两对等位基因(A1与a1,A2与a2)控制,且含
In studying biological genetics, often involves a number of pairs of alleles to control a pair of relative traits of the imperfect dominant problems, polyploidy produce gametes species and the proportion of problems .Some teachers repeatedly explain, students still do not understand, in the face of the relevant exercises , Test questions, the total feeling can not start .In the teaching process of mathematics “combination method ” into the teaching of genetics, received a multiplier effect, a brief introduction is as follows: First, according to the parent (or parental) genotype, seeking Sub-representative phenotypic separation ratio 1 Black and white hair of a test animal are controlled by two pairs of alleles (A1 and a1, A2 and a2) on two pairs of homologous chromosomes and contain