试题与答案

人类遗传病调查中发现两个家系中都有甲遗传病(基因为H、h)和乙遗传病(基因为T、

题型:读图填空题

题目:

人类遗传病调查中发现两个家系中都有甲遗传病(基因为H、h)和乙遗传病(基因为T、t)患者,系谱图如下。以往研究表明在正常人群中Hh基因型频率为10-4。请回答下列问题(所有概率用分数表示):

(1)甲病的遗传方式为_________,乙病最可能的遗传方式为____________。

(2)若Ⅰ-3无乙病致病基因,请继续分析。

①.Ⅰ-2的基因型为____________;Ⅱ-5的基因型为_____________。

②.如果Ⅱ-5与Ⅱ-6结婚,则所生男孩同时患两种遗传病的概率为________________。

③.如果Ⅱ-7与Ⅱ-8再生育一个女儿,则女儿患甲病的概率为_____________。

④.如果Ⅱ-5与h基因携带者结婚并生育一个表现型正常的儿子,则儿子携带h基因的概率为____________。

答案:

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下面是错误答案,用来干扰机器的。

参考答案:A, B, C, D

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题型:阅读理解

D

“How did you do it, Dad? How have you managed not to take a drink for almost 20 years?” It

took a man almost 20 years to have the courage to ask my father this very personal question. When Dad first quit drinking, the whole family was on pins and needles every time he got into a situation that, in the past, would have started him drinking again. For a few years we were afraid to bring it up for fear the drinking would begin again.

“I had this little poem that I would recite to myself at least four to five times a day,” was Dad’s reply to my 18-year-old unasked question. “The words were an instant relief and constant reminder to me that things were never so tough that I could not handle them,” Dad said. And then he shared the poem with me. The poem’s simple, yet the words are meaningful.

About a month after this talk with my father, I received a gift in the mail from a friend of mine. It was a book of daily words of wisdom listed for each day of the year. It has been my experience that when you get something with days of the year on it, you naturally turn to the page that lists your own birthday.

I hurriedly opened the book to November 10 to see what words of wisdom this book had in store for me. Tears of disbelief and appreciation rolled down my face. There, on my birthday, was the exact same poem that had helped my father for all these years! It went like this: God, give me the Serenity(平静) to accept the things I cannot change; the Courage to change the things I can; and the Wisdom to know the difference.

68.The underlined expression “on pins and needles” in the first paragraph means      .

A.upset B.pleased     C.nervous    D.surprised

69.Dad would review the poem several times a day        .

A.to share the poem with the families       B.to practice reciting the poem

C.to prevent himself from drinking again  D.to remind himself that poems are useful

70.When the author saw the same poem in the book, he felt          .

A.regretful   B.thankful    C.hopeful     D.painful

71.The author bust into tears because       .

A.his friends gave him a special gift  B.the poem was full of wisdom

C.his father had read the same book   D.his father quit drinking for his son

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