second filial generation

• 子二代

second filial generation的用法和样例：

例句

1. 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。