有些遗传试题,计算起来十分繁琐,如果用棋盘法计算,就十分快捷、准确、高效.棋盘法解题的步骤是:(1)表格的横行和纵列分别代表的是即将结合的雌雄两种配子;(2)在每一种配子前标出该配子的基因频率;(3)棋盘式内即为雌雄配子结合时构成的基因型,两种配子概率的乘积即为该种基因型出现的频率.现举例说明它在解答遗传计算题方面的应用.1.有关亲代基因型(或表现型)不确定的计算 Some genetic test, calculate very cumbersome, if calculated by the checkerboard method, it is very fast, accurate and efficient steps to solve the checkerboard problem is: (1) the form of horizontal and vertical columns are represented by the upcoming combination of male and female (2) the gene frequency of the gametes is marked before each gamete; (3) the genotype is formed by the combination of male and female gametes in the checkerboard, and the product of the probabilities of the two gametes is the genotype The frequency is given as an example to illustrate its application in solving genetic problems.1.An indeterminate calculation of the parental genotype (or phenotype)