填空题根据孟德尔遗传规律，一对基因是杂合的个体能够产生两种配子，该个体自交能够产生三种基因型的个体。假如该杂合体涉及”对基因，能够产生______种配子，自交后能够产生______种基因型的个体。

填空题Ice基因是人体的______基因，ICE诱发的细胞死亡可被______基因所挽救。

填空题在完全显性，不完全显性，共显性，镶嵌显性等情况下，F 2 代表现型分离比例分别是______、______、______、______。

填空题重叠基因的特点在于：______。

填空题数量性状的遗传力一般______质量性状的遗传力。

填空题假定有两对等位基因以相加效应的方式决定植株的高度。纯合子AABB高60cm，纯合子aabb蚰高30cm，问，(1)这两个纯合子之间杂交，F1的高度是______；(2)F1自交产生的F2群体中40cm高的植株所占的比例是______。

填空题细胞分化意味着优先合成某些特异性蛋白质，所以决定细胞分化的主要因素是______。

填空题生物体的性别决定方式有多种类型，试确定下列个体的性别：人类XXY______，XO______；果蝇AAXXY______，AAXY______，AAAXX______；鸡ZW______。

填空题转化的频率随着DNA纯度的提高而______，转化可以在体外进行。

填空题人类中，下列细胞你能观察到多少条染色体?脑细胞______，红细胞______，极体______，精细胞______，次级卵母细胞______。

填空题植物的雄性不育系和保持系杂交得到______，与恢复系杂交得到______，而保持系自交得到______。

填空题利用人工的方法在体外合成核酸包括两种方法：一种是______；另一种是______。

填空题用三隐性纯合体(aabbcc)与三对独立基因的杂合体(AaBbCc)测交，子代可能有______种表现型，其比例为______。若与三对连锁基因的杂合体(AaBbCc)进行杂交，若三对基因之间均为不完全连锁，且并发系数不为0，子代可能有______种表现型，并发系数为0时，子代有______种表现型。

填空题位于同一基因位点上的各个等位基因，称为______基因。

填空题噬菌体是指寄生于______细胞中的病毒。

填空题宿主染色体在反转录病毒整合位点上会发生______。

填空题Almost every day we see something in the papers about the latest exciting developments in the space race. Photographs are regularly flashed to the earth from thousands and even millions of miles away. They are printed in our newspapers and shown on our television screens as a visible proof of the man's newest achievements. The photographs neatly sum up the results of these massive efforts to ' conquer space' and at the same time they exposed the absurdity of the undertaking. All we can see is an indistinguishable blob that is supposed to represent a planet seen from several thousand miles away. We are going to end up with a little moon-dust and a few stones which will be put behind glass in some museum. (41)__________ (42)__________It is just an extension of the race for power on earth. Only the wealthiest nations can compete and they do so in the name of pure scientific research. But in reality, all they are interested in is power and prestige. They want to impress us, their spectators, with a magnificent show of strength. Man has played the power game ever since he appeared on earth. Now he is playing it as it has never been played before. The space race is just another aspect of the age-old argument that "might is right". (43)__________But what has the space race done to relieve the suffering of the earth's starving millions? In what way has it raised the standard of living of any one of us? As far as the layman is concerned, the practical results of all this expenditure of money and efforts are negligible. Thanks to space research, we can now see television pictures transmitted live halfway across the globe and the housewife can use non-stick frying pans in the kitchen. The whole thing becomes utterly absurd when you think that no matter what problems man overcomes, it is unlikely that he will ever be able to travel even to the nearest star. (44)__________For the first time in his history, man has the overwhelming technological resources to combat human suffering, yet he squanders them on meaningless pursuits. (45)__________Individuals with limited budgets usually get their priorities right; they provide themselves with necessities before trying to obtain luxuries. Why can't great nations act in the same sensible way? Let us put our house in order first and let space look after itself. [A] An increasing number of people even begin to picture a space travel in recent years. [B] Poverty, hunger, disease and war are man's greatest enemies and the world would be an infinitely better place if the powerful nations devoted half as much money and effort to these problems as they do to the space race. [C] The space race is not simply the objective search for knowledge though it is often made out to be. [D] On the other hand, people benefit dramatically from the development of science and technology. [E] This is hardly value for money when you think that our own earth can provide countless sights that are infinitely more exciting and spectacular. [F] We are often told that technological know-how, acquired in attempting to get us into orbit, will be utilized to make better on earth. [G] If a man deprived himself and his family of food in order to buy and run a car, we would consider him mad.

填空题黑腹果蝇的截毛基因位于Y染色体上，但是在雌蝇中也有截毛性状的表现，原因在于______。

填空题无论是短暂的和持久的母性影响，它们的遗传基础本质上都在于______基因的作用，其特点是父方的______推迟一代表现与分离。

填空题顺反子既有功能上的______，又有结构上的______。