题目

首字母填空 1. Everyone in my class likes Jack because he is very f______. 2. Tell me about your h______.----Well， I like reading very much. 3. The party usually starts at 8 p.m，and e______ at 11 p.m. 4. Ben always r______ a bicycle to school . 5. You can watch TV after you f______ your homework. 6. He is a good student， and he is n______ later for school. 7. The bell r______， Let’s go to have a class. 8. My sister’s d______ is to be an engineer and she works hard for it. 9. If you want to win the match， you need a lot of p______ first. 10. Mum goes to the m______ to buy ve现有两个纯合的水稻品种：甲（抗病高秆）和乙（感病矮秆），已知抗病（A）对感病（a）为显性，高秆（B）对矮秆（b）为显性。甲与乙杂交获得F1，F1自交，F2有四种表现型，其中抗病矮杆所占比例为3/16。现以甲、乙为材料，经不同育种方法培育获得矮秆抗病的植株，过程图如下。请回答问题： （1）A/a、B/b这两对基因的位置关系是_____________________ 。（2）过程①③可表示___________，利用的原理是______________________。（3）图中可获得新基因的是过程______________________，该育种方法为 __________________ 。 （4）过程④理论上可获得___________种单倍体，过程⑤常采用的方法是用___________（试剂）处理单倍体的幼苗，图中与之处理相同的是过程___（填序号）。