题目

用基因组成为Aa的鸭梨枝条，嫁接到基因组成为aa的枝条上，结出果实的果皮细胞基因组成为Aa的概率是（ ） A . 25% B . 50% C . 75% D . 100% 答案：DHe was _____ prison for political reasons. [    ] A. put in B. put forward C. put aside D. put down