(中国科学技术大学，2003)物种是________，它是________的单元，也是________单元。

与mRNA上密码子UGG相配对的tRNA反密码子为_________。

(厦门大学，2000)金丝雀的黄绿色羽毛由性连锁隐性基因控制，绿色羽毛由基因A控制。下列交配，哪一种组合会产生所有的雄雀都是绿色，雌雀都是黄棕色的结果___________。

DNA复制时，两条被解开的单链是按什么方向顺序合成互补的核苷酸?___________

太古代距今________亿年，当时的主要生物是________、________、________和________。

携带反密码子的RNA是_________。

在tRNA的3’端有一个固有的序列，是活化氨基酸附着的位置_________。

首次通过细菌转化实验直接证明DNA是遗传物质基础的科学家是___________。

不同物种的种群之间存在着________隔离，同一物种的种群之间存在着________隔离。

各种染色体的变化都是起源___________。

下列哪种氨基酸没有遗传密?_________

单选题DNA解链(熔解)温度Tm决定于 a．A-T碱基对的比例； b．G-C碱基对的比例； c．A-T碱基对的比例和DNA变性条件； d．G-C碱基对的比例和DNA变性条件。

单选题对于一个隔离的且数量已经大为减少的种群来说，其潜在的危险是( )。

单选题正反交结果一致的遗传方式有( )。

单选题基因的起始密码通常为AUG，但在少数情况下也可为GUG或UUG。这种少数情况 a．仅出现于真核细胞； b．仅出现于细菌； c．在真核和细菌中均有发生。

单选题在一个遗传平衡群体中，如果某一遗传病(XR——性连锁隐性遗传病)的男性发病率为0.04，该群体中女性的发病概率为( )。

单选题一般说，X连锁隐性突变比常染色体隐性突变较易研究。下面三个原因中哪个正确：______。 A.X连锁隐性基因位于X染色体上，容易检测 B.X连锁隐性基因纯合率高 C.X连锁隐性基因容易在雄性半合子身上表现出来 D.以上都不对

单选题人类白化病是常染色体单基因隐性遗传病，这意味着白化病患者的双亲必须是(假定白化症患者不是由新突变引起的)______

单选题转导过程中产生的转导子，下面哪种说法对转导子的描述是正确的? ____

单选题As thick-skinned elected officials go, FIFA President Joseph S. Blatter is right up there with Bill Clinton. The chief of the Zurich-based group that oversees World Cup soccer hasn't been accused of groping any interns, but that's about all he hasn't been accused of. Vote buying, mismanagement, cronyism--and that's just for starters. Yet the 66-year-old Swiss shows no sign of abandoning his campaign for a second four-year term. Blatter, a geek of dispensing FIFA'S hundreds of million in annual revenue to inspire loyalty, even stands a good chance of reelection. At least he did. Since mid-March, he has seen a credible challenger emerge in Issa Hayatou, president of the African Football Confederation. Hayatou, a 55-year-old from Cameroon, leads a group of FIFA reformers that also includes FIFA Vice-President Lennart Johansson, a Swede who lost the presidential election to Blatter in 1998. These contenders' mission: to end what they call the culture of secrecy and lack of accountability that threatens FIFA with financial disaster. Representatives of the world's 204 national soccer associations meet in Seoul on May 29, and the rebels are given a chance of unseating Blatter. But even they concede that the FIFA honcho won't be easy to dislodge. Blatter's staying power seems incredible, given the array of misdeeds attributed to him and his circle. However, there are signs that FIFA'S troubles are bigger than Blatter is saying. The insurgents have already won one victory: They persuaded the rest of the executive board to order an audit of FIFA finances. But Blatter--who claims, through a spokesman, that the accusations are a smear campaign-should not be underestimated. At least publicly, sponsors and member associations remain remarkably siient with the controversy. For example, there is no outward sign of outrage from German sports equipment maker Adidas Salomon, which is spending much of its $ 625 million marketing budget on the World Cup. "We don't expect current developments within FIFA to have a negative impact on our expectations" for the World Cup, says Michael Riehl, Adidas head of global sports marketing. The conventional wisdom is that fans don't care about FIFA politics. Says Bernd Schiphorst, president of Hertha BSC Berlin, a top-ranked German team: "I've no fear that all these discussions are going to touch the event." Still, the Olympic bribery scandals and the doping affair in the Tour de France show that sleazy dealings can stain the most venerable athletic spectacle. "For the Good of the Game" is FIFA'S official motto. The next few months should show whether it rings true.