second adj.第二的;次等的;再一个的num.第二n.片刻;秒adv.第二;其次v.支持;赞成;附和;调派
双语例句
If the characteristic is governed by simple Mendelian genes, the typical monohybrid and dihybrid ratios become apparent in the F2 generation. 如果其特征取决于单一孟德尔基因,那么典型的单基因杂种和和双基因杂种的遗传比率将在子二代呈现。