问答题简述果蝇胚胎发育过程中决定前、后轴发育的基因的功能。

问答题转座子的遗传学效应之一是可能造成染色体局部片段的缺失、倒位，请说明产生这两种遗传学效应是怎样产生的(可用图示辅助)。

问答题在人类中称为色觉白化症的性连锁突变能使男人和纯合女人的视网膜上的色素消失。在杂合女人中视网膜上往往相间分布有色素部分和白化部分，如何解释这种现象?

问答题一个包含两对连锁基因A，a和B，b的群体(A对a显性，B对b显性)，在群体中有下列表型比例，AB=40%，Ab=20%，aB=30%，ab=10%。问：

问答题一对基因A、a在群体中各基因型AA、Aa和aa的起始频率分别为0.3、0.4、0.3，随机交配5代后，其基因频率与基因型频率各为多少?

问答题如果某一遗传的正反交结不一样，你怎样确定他是属于母性影响，细胞质遗传或是伴性遗传?

问答题一个隐性纯合致死基因的最高频率是多少?当该致死基因频率达到其最大值时，群体的遗传组成如何?

问答题Psychologists once believed that the motive that caused men to strive to attain high-level managerial positions was the "need for achievement". But now they believe it is the "need for power". Power seekers strive hard to reach positions where they can exercise authority over large numbers of people. (46) Individual performers who lack this drive are not likely to advance far up the managerial ladder. They usually scorn company politics and devote their energies to other types of activities. The power game is part of management, and it is played best by those who enjoy it most. (47) One of the least rational acts of business organizations is that of hiring managers who have a high need to exercise authority, and then teaching them that authoritative methods are wrong and that they should be consultative or participative. (48) It is a serious mistake to teach managers that they should adopt styles that are inconsistent with their unique personalities. Yet this is precisely what a large number of business organizations are doing; and it explains, in part, why their management development programs are not effective. (49) What managerial aspirants should be taught is how to exercise their authority in a way that is appropriate to the situation and the people involved. They need to learn that the real source of their power is their own knowledge and skill, and the strength of their own personalities, not the authority conferred on them by their positions. When they lack the knowledge or skill required to perform the work, they need to know how to share their authority. (50) But when they know what has to be done and have the skill and personality to get it done, they must exercise their traditional authority in whatever way is necessary.

问答题母性影响

问答题染色质(chromatin)

问答题某种生物的初级卵母细胞中有16条染色体，那么请试回答下列问题： (1)在第一次减数分裂前期有多少四分体? (2)在减数分裂的前期Ⅱ含有几个二分体? (3)减数分裂后期Ⅱ各有几条染色体移向细胞的两极?

问答题回文环

问答题简述理想群体必备的条件。

问答题顺反效应

问答题如何利用A、B、C、D四个玉米自交系(其中A和B是姊妹系，C和D是姊妹系)的相应不育系、保持系和恢复系，配成具有较强杂种优势的双交种?并说明其理论依据。

问答题营养缺陷型

问答题请说明DNA复制过程有哪些酶参加，各起何作用?

问答题为了弄清某种重要生命现象(性状)的分子机制，分子遗传学家通常首先进行遗传学研究，即诱变并筛选该生命现象(性状)发生改变的突变体。然而在实际工作中，经常不能获得预期中的突变体。试解释之。

问答题重组率和交换率的定义是什么?请说明二者之间的关系。

问答题从现有科学事实，怎样正确理解在遗传中细胞核与细胞质之间的关系?