问题 填空题 案例分析题

下图示某遗传系谱,两种致病基因位于非同源染色体上。根据条件分析回答。

 

如果1号不带甲病基因,则:①甲病基因在()染色体上;②乙病属于()(显、隐)性遗传病;③4号是杂合子的概率为();④5号和一位乙病基因携带者的正常个体婚配,生出正常女儿的基因型和对应的概率分别是()

答案

参考答案:①X;②隐;③5/6;④BbXAXA,3/16;或BbXAXa1/16

阅读理解

Recently, an Internet game has become a new fashion among young office workers and students. People can “farm” on a piece of “land” and “grow”, “sell” or even “steal vegetables”, “flowers” and “fruits” on the Net. They can earn some e-money and buy more “seeds”, “pets” and even “houses”.

Joyce interviewed some young people. Here are their opinions:

Harold: I don't quite understand why they are so mad about the childish game. Maybe they are just not confident enough to face the real world.

Allan: I enjoy putting some “bugs” in my friends’ gardens and we’ve become closer because of the game. Having fun together is the most exciting thing about it.                                

Laura: You know, people in the city are longing for(渴望)the life in the countryside. It reduces my work pressure(压力). Besides, it gives me the exciting experience of being a “thief”.

Ivy: Well, it's just a waste of time. Teenagers playing the game spend so many hours on it that they can not focus on (专注于)their study.

小题1: According to the passage, people can’t          things in this game.

A.grow

B.borrow

C.steal

D.sell小题2: Among the people Joyce interviewed, _____ likes the game while      dislikes the game.

A.Laura, Allan

B.Allan, Harold

C.Harold, Ivy

D.Ivy, Allan小题3: From Laura's words, we can guess that she's most probably        .

A.a student

B.an office worker

C.a farmer

D.a thief小题4:Which is NOT the reason why people like the game?

A.They are longing for country life.

B.They can have fun with friends.

C.The game can relax people and give them a new experience.

D.They are confident enough to face the real world.小题5:Where can you find this passage?

A.In a car magazine.

B.In an advertisement.

C.In a newspaper.

D.In a science book.

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