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  3. The government of Burkina Faso granted scientists permission to release genetically engineered mosquitoes anytime this year or n

The government of Burkina Faso granted scientists permission to release genetically engineered mosquitoes anytime this year or n

admin2020-11-04  25
问题    The government of Burkina Faso granted scientists permission to release genetically engineered mosquitoes anytime this year or next, researchers announced Wednesday. It’s a key step in the broader efforts to use bioengineering to eliminate malaria in the region.
   The release, which scientists are hoping to execute this month, will be the first time that any genetically engineered animal is released into the wild in Africa. While these particular mosquitoes won’t have any mutations (变异) related to malaria transmission, researchers are hoping their release, and the work that led up to it, will help improve the perception of the research and trust in the science among regulators and locals alike.
   In Africa, the project’s success depends on more than just the science of genetic engineering. The people who live in the areas where the mosquitoes will be released must give their consent, researchers must staff and maintain labs to work with genetically modified animals, and regulators must accept the new technology. The impending (即将发生的) release of these mosquitoes serves as a stress test for the whole system.
   These mosquitoes, unlike their "gene drive" counterparts, are not intended to have a lasting impact on the insect population. They have something called a "sterile (不育的) male" mutation—none of the male mosquitoes that will be released will be able to have offspring. Nearly all will be male, but less than one percent might be female—which are the only members of the species that bite. If any bite a human, they will not pass on any genetically modified material. All of the modified mosquitoes the group will release are also weaker than natural mosquitoes, so they should die off in a matter of months.
   The scientists also worked hard to address questions about the science behind their efforts—including concerns about whether those "sterile males" might somehow pass on that sterile status to humans. And they even brought in linguists and worked with the village’s residents to develop a standard vocabulary of scientific phrases in Dioula, the local language, which doesn’t have words for ideas like "gene".
What do we learn about the release of genetically engineered mosquitoes?
选项 A、It will prevent malaria from spreading.
B、It is the first release in Africa.
C、It will have a long-term influence.
D、Genetic engineering determines its success.
答案A
解析 事实细节题。由定位句可知，这是利用生物工程消除该地区疟疾更多努力中的关键一步，即释放转基因蚊子将会阻止疟疾的传播，故答案为A)。B)“这是第一次在非洲进行释放”，第二段第一句指出这是第一次在非洲野外释放转基因动物，原文的第一次释放专指对转基因动物的释放，选项B)说法不够准确，故排除；C)“它将产生长期影响”，第四段第一句指出这些蚊子将不会对种群产生持久影响，故排除该项；D)“基因工程决定着它能否成功”，第三段第一句指出该项目的成功不仅仅取决于基因工程科学，故排除该项。
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