问题 填空题 案例分析题

图1为某家族的遗传系谱图,甲病基因用A或a表示,乙病基因用E或e表示,其中有一种病的基因位于X染色体上;男性人群中隐性基因a占1%。请分析并回答问题:

若Ⅲ7在一次核泄漏事故中受到核辐射,其睾丸中约4%的精原细胞在分裂过程中出现异常,即图2中③号染色体着丝粒不能分裂,其他染色体正常分配,则图2所示的细胞为()细胞,该男性产生的异常配子占总配子数的()%。

答案

参考答案:次级精母细胞;2

阅读理解

B

To: manager@ tastytreat.com.ca

Date: Monday, 7 October, 3:34p.m.

From: raymondyuen@ canada.net

Subject: Complaint

Dear Mr. Price,

I have eaten in your restaurant many times and have always been happy with the food and service. This makes what happened last Saturday even more disappointing.

It was my son’s birthday so we booked a no-smoking table at your restaurant for 7:30 p.m. We arrived on time but were told that our table was not yet ready. At 8:00 p.m., we were given a table in the smoking section. I asked to move but I was told that there were no other tables. A lot of people were smoking so it was uncomfortable and unhealthy.

Our first waitress, Janet, was very polite and helpful. She gave us free drinks for waiting so long. Our food also came quickly and looked fresh and tasty. When my wife had eaten most of her meal, she found a dead cockroach (蟑螂) in her vegetables. She was shocked and wanted to leave. At first, the waitress told us it was a piece of garlic(蒜). When we told her that garlic does not have legs, she apologized and took the food away.

We asked for the bill, expecting not to pay for my wife’s meal. Nobody came. After 15 minutes, I asked to see the manager. The head waiter told us that you were on holiday. I complained again about the horrible cockroach. He told me Janet had finished work. He didn’t believe my story and gave me a bill for three meals. I argued with him but was forced to pay.

The waitress, Janet, was always friendly, but I would like an apology from your impolite head waiter and a full refund (退款) for our meal. It cost $68. Until then, I will not be eating at your restaurant or recommending it to anyone.

You can contact me at 742-3254 or through e-mail if you want more information.

Thank you for your attention.

Yours sincerely,

Raymond Yuen

69. We learn from the text that last Saturday Mr. Yuen _____.

  A. was satisfied with the restaurant.          B. was disappointed with the restaurant

  C. had to wait for his food                   D. ate for the first time at the restaurant

70. The writer had to pay the bill because _______.

A. the head waiter would not believe his story 

B. the manager was on holiday

C. Janet didn’t believe there was cockroach in the vegetables

D. his wife had eaten most of her meal

71. Which of the following is not true according to the passage?

A. Mr.Yuen demanded that the head waiter apologize to him.

B. Mr.Yuen asked for a full refund for their meal.

C. Mr.Yuen will not eat at the restaurant any more.

D. The head waiter was not as polite as Janet. 

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