29. China’s police authority Friday launched a two-month campaign against drink driving ,aimed_____ serious traffic accidents.
A. to preventing B. at preventing C. preventing D. prevented
28.More and more young girls are ______ to South Korean soap operas because of the beautiful scenes in them.
A adapted B addicted C admitted D affected
27.Luckily,traditional Chinese medicine (TCM) is making a difference _______ the H1N1 flu.
A from B of C with D against
26.Each day is new.______ this changing world, we need to learn how to change our ways.
A To survive B Survived C Having survived D To be survived
25.I had a fear of _____,and the higher I got, the ____ I felt.
A high; worse B height; better C heights ;worse D high ;better
第一节:单项选择(共15小题,每小题1分,满分15分)
21.Life _____ like a box of chocolate;you never know what you ____ get.
A was ;will B is; are going to C will be; are to D has been ; are about to
a became ______first developing country to host _____ World Expo when ShangHai won the bid in December 2002 with a “ better city, better life” theme.
A the; the B a; the C the; / D a;/
23_____from the appearance, it is very peaceful; but in fact , a great event will break out soon.
A Judging B Judged C Judge D To judge
a______ grand celebrations every 10 years to celebrate the founding of the country,but this year’s parade (阅兵式)______those in the past.
A held; topped B has held; to top C holds; topped D holds; tops
45.(15分)果蝇是遗传学研究的好材料,人们对果蝇的遗传及变异作了较充分的研究。
I.人们研究发现,Y染色体含有几十个基因。如果果蝇的刚毛、截毛这对相对性状由X、Y染色体上的一对等位基因控制,刚毛基因B对截毛基因b为显性。让刚毛果蝇与截毛果蝇杂交,后代中,雌果蝇全为刚毛,雄果蝇全为截毛,则亲本的杂交组合为(基因型): 。用遗传学图解表示这一杂交过程。
遗传学图解:
II.某生物兴趣小组饲养了一批纯合的长翅红眼果蝇幼虫,分装在10支试管中,准备放在25℃培养箱中培养(果蝇生长的最适温度),由于疏忽,其中有2支试管未放入培养箱,当时气温高达37℃,十天后观察发现,培养箱中的果蝇全为长翘,而未放人培养箱中的果蝇出现残翅。
(1)果蝇细胞中基因的载体有 你认为基因、环境因素、性状三者关系是怎样的?
(2)残翅性状的出现在遗传学上称为 。你认为出现残翅的可能的原因有①
②
(3)请设计实验证明你的推测。(简要写出实验步骤,预期结果并得出结论。提示:选择果蝇杂交的方法进行实验)
实验步骤:a.
b.
c.
预期结果与结论:
①: ;
②: 。
44.(8分)多指为一种常染色体显性遗传病,受P基因控制;红绿色盲是一种x染色体的隐性基因控制的遗传病,受b基因控制,分析下列遗传系谱,回答问题:
(1)某中学生物兴趣小组开展研究性学习,对该校各年级在校学生中红绿色盲发病情况进行调查。假设调查人数共3000人,(男性1500人,女性1500人),调查结果发现有色盲患者45个,其中男性40人,女性5人 。说明红绿色盲的遗传有 的特点。
(2)Ⅲ一1个体的一个精原细胞产生的精子类型分别是 。
(3)Ⅲ一2的基因型是 ,她是纯合体的概率为 。
(4)如果Ⅳ一l是一个男孩,此男孩既是多指又是色盲的概率为 不患色盲的概率为 ;两病都不患的概率为 。
(5)Ⅳ一2是一个只患色盲而不患多指女孩的概率为 。
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