8.---The book is borrowed from the library. You ____ your children touch it with their dirty hands. ---Sorry.
A.should have let B.needn’t have let
C.mustn’t have let D.ought not to have let 9.---What would you like to see, my passport or my ID card?
---Oh, ____.
A.either one will do B.each will be fine
C.each one is good D.either does well
6.Nowhere else in the world ____ more attractive scenery than in my home country, China.
A.can you find B.you can find C.you have found D.has been found 7.____ is none of your business.
A.What action I shall take B.What action shall I take
C.It is what action I shall take D.I shall take what action
5.---Why are the four students so happy?
---_______ in the science competition, they are awarded prize money totaling $20,000.
A.Judged the best B.Judging the best
C.To be judged the best D.Having judged the best
4.---Why does the boss look worried?
---Tom left the company a month ago and his work ________ unfinished ever since.
A.has been left B.was left C.left D.is leaving
3.---We’ve seen many more days of blue skies recently.
---True. But back in 1998, ________ Beijing started its “Defending the Blue Sky” program, the city only ________ about 100 days a year.
A.which, sees B.that, saw C.when, saw D.and, seeing
2.How about taking ______ short break? I want to make _______ call.
A.the, a B.a, the C.the, the D.a, a
1.---Where shall we go and enjoy ourselves in summer? --- Of course, Qinhuangdao. ________ next to Bohai Sea ________ a coastline of 124 km, it is a
perfect place to go in summer.
A.Laying, at B.Lying, with C.Laid, with D.Being laid, for
34.
(12分)如图为基因表达的过程,据图回答:
(1)能将遗传信息从细胞核传递至细胞质的是 (填数字),其基本组成单位是
。进行a过程所需的酶有 和 。
(2)图中⑤所运载的氨基酸是 。(密码子:AUG-甲硫氨酸、GCU-丙氨酸、AAG-赖氨酸、UUC-苯丙氨酸)
(3)图中信使RNA对应的DNA片段连续复制两次共需要游离的胸腺嘧啶脱氧核苷酸的数目为 个。
33.(8分)回答下列有关遗传的问题(图中■患甲病男性,□正常男性,●患甲病女性,○正常女性)。
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(1)张某家族患有甲病,该家族遗传系谱图不慎被撕破,留下的残片如上图。
①现找到4张系谱图碎片,其中属于张某家族系谱图碎片的是( )
②7号的基因型是 。(基因用A、a表示)
③若16号和正确碎片中的18号婚配,预计他们生一个患病男孩的概率是 。
(2)李某家族也患有甲病,其遗传系谱图如下。已知Ⅱ3无致病基因,Ⅲ1色觉正常;17号是红绿色盲基因携带者。若Ⅲ1与17号结婚,则他们的孩子中只患一种遗传病的概率是 。
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32.(16分)下图分别表示某基因型为AaBbdd的雌性高等动物细胞分裂过程中某时期的染色体和基因示意图(·和表示着丝点,1表示的染色体是X染色体)及配子形成时细胞中染色体数量变化曲线图。请据图回答:
(1)图A细胞名称为____________,该细胞中含同源染色体_________对,1表示X染色体,则2和3叫做____________。
(2)写出该生物可以产生的配子的基因组成________ 、________、_______、________。
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(3)如果该生物进行测交,另一亲本体细胞中的染色体和有关基因的组成应是下图中的_______________。
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