题目

已知桃树中，树体乔化与矮化为一对相对性状(由等位基因D、d控制)，蟠桃果形与圆桃果形为一对相对性状(由等位基因H、h控制)，蟠桃对圆桃为显性。下表是桃树两个杂交组合的实验统计数据： (1)根据组别________的结果，可判断桃树树体的显性性状为________。 (2)甲组的两个亲本基因型分别为_______________________________________________。 (3)根据甲组的杂交结果可判断，上述两对相对性状的遗传不遵循自由组合定律。理由是：如果这两对性状的遗传遵循自由组合2. 阅读理解，选择正确的答案。    My name is Tom. I am a policeman. I eat dinner at 7-00 in the evening. Then I go to work at 9:00. I work at night. I go home at 5:00 in the morning. I eat breakfast at 6:00. Then I go to bed at 6：20. I often get up at 12：00 at noon. I eat lunch at 2：30. I play sports at about 3：00 in the afternoon. I watch TV at 6：30. This is my day. I enjoy my work. What about yours?() 1. What is Tom's job?   A. He is a policeman.       B. He is a teacher.() 2. When does Tom go to work? i   A. At 9:00 a.m.             B. At 9:00 p. m.() 3. Does Tom work at night?   A. Yes,he does.             B. No,he doesn’t.() 4. When does Tom play sports?   A. At 3：00 in the morning. B. At 3:00 in the afternoon.() 5. What is the Chinese meaning of “enjoy” ？   A. 厌恶。                   B. 喜欢。