0  364128  364136  364142  364146  364152  364154  364158  364164  364166  364172  364178  364182  364184  364188  364194  364196  364202  364206  364208  364212  364214  364218  364220  364222  364223  364224  364226  364227  364228  364230  364232  364236  364238  364242  364244  364248  364254  364256  364262  364266  364268  364272  364278  364284  364286  364292  364296  364298  364304  364308  364314  364322  447090 

5. We must not    the good traditions passed down from generation.

A. Catch sight of  B. lose the sight of  C. lose sight of  D. catch the sight of

6 The writer ___ his writing so that he forgot to have his lunch.

A absorbed  B was absorbed into  C absorbed into  D was absorbed in

7  The ___ look on his face showed that he hadn’t expected it .

A astonished  B astonishing  C being astonished  D having astonished

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4.As you know, the Group of Eight is an organization     the richest countries in the world.

  A is consisted of sisting of  C.cosists of sisted of

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3. After his journey from abroad, Richard Jones returned home,     .

  A exhausting   B exhausted  C being exhausted  D having exhausted

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2. It’s very dangerous to be ____ to the SARS virus without any protection.

A disclosed  B uncover  C affected  D exposed

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1. -I enjoyed the food very much.

-I’m glad you like it. Please drop in any time you like.

-________

A. Is it all right?         B. I'm afraid I won't be free.

C. Yes, I will.          D. That's great.

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62、下图为对某一家族中甲、乙两种遗传病调查后得到的系谱图。I-4的家庭中没有乙病史。

试回答(以A与a、B与b依次表示甲、乙两种遗传病基因及等位基因);

⑴甲病的遗传属于    染色体   性遗传;乙病最可能属于    染色体   性遗传。

(2)若U已两病兼发的哥哥,则U正常的可能性为      

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61、(10分)番茄果实的颜色由一对遗传因子A、a控制着,下表是关于番茄果实颜色的3个杂交实验及其结果。请分析回答:

实验组
亲本表现型
F1的表现型和植株数目
红果
黄果
1
红果×黄果
492
504
2
红果×黄果
997
0
3
红果×红果
1511
508

(1)番茄的果色中,显性性状是     ,这一结论是依据实验     得出。

(2)写出3个实验中两个亲本的遗传因子组合。

实验一:           ;实验二:       ;实验三:       

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60、下图中,横轴表示细胞周期,纵轴表示一个细胞核中DNA含量或染色体数目的变化情况。请分析,能表示有丝分裂中DNA含量变化的曲线是(   )

A.①         B.②        C.③       D.④

第II卷  非选择题(共40分)

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59、某生物细胞有丝分裂后期细胞中有92个着丝点,这种生物细胞在减数第二次分裂中有染色体数目最多是(   )

A、92条       B、46条        C、23条      D、69条

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57、减数分裂四分体时期的细胞中,每个染色体与其DNA分子数之比是(   )

A、1:2       B、1:4      C、1:8     D、2:1

58某动物体细胞中含有38条染色体,该动物细胞处于四分体时期时,含有双链DNA的个数是(   )

A、38个       B、76个      C、少于76个    D、多于76个

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