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  3. Though explaining the entire human genetic blueprint is still a few years a

Though explaining the entire human genetic blueprint is still a few years a

游客2024-05-12  39
问题      Though explaining the entire human genetic blueprint is still a few years away, scientists have begun laying claim to the stretches of DNA whose codes they have succeeded in cracking. In recent years researchers have flooded the U.S. Patent and Trademark Office with applications for thousands of genes and gene fragments — and they have stirred a lot of controversy in the process.
     The biggest problem with patenting genes is that while scientists have at least a general idea of what specific strands of genetic coding do, often it’s just that — general. Investigators do sometimes succeed in isolating a single, crisp gene with a single known function. Often, however, researchers trying to map genes get no further than marking off fragmentary stretches of DNA that may be thousands of bases in length. These so-called expressed sequence tags may have real genetic information embedded in them, but determining where those fragments are and what their structure is takes more digging. Geneticists have lately been filing patent applications for these ESTs anyway. "I would guess that in many cases the scientists didn’t even examine all the material," says Bruce Lehman, commissioner of the Patent and Trademark Office.
    Not only can such filings be careless genetics, they can also be bad business. EST applications may lead to so-called submarine patents, claims that are made today and then vanish, only to reappear when some unsuspecting scientist finds something useful to do with genes hidden in the patent.
    More troubling is an economic issue. If the entire genetic schematic is preemptively (抢先) owned by the research teams studying it now, where is the incentive for independent scientists — often sources of great innovation — to work on it later: Licensing costs, warns Jeffrey Kahn, director of the University of Minnesota’s Center for Bioethics, could hold medical progress hostage. Patenting supporters insist that an equally persuasive argument could be made that the large genome-mapping groups need patent protection to make their work worthwhile to them.
    Stickier than the economic question is the ethical one. Most of us shrink from the idea of anyone’s owning the rights to any part of the human form. Besides, if the first anatomist (解剖学家) to spot, say, the pancreas (胰腺) was not granted title to it, why should modern genome mapping scientist be able to claim even a single gene: That kind of argument is grounded not in law but in the very idea of what it means to be human — an issue that even the highest federal court is not likely to settle.  [br] Laying claim to DNA stretches can be careless genetics because ______ .
选项 A、those who patent gene fragments are not qualified geneticists
B、the same gene fragments are often patented by different scientists
C、geneticists have no idea what they are going to do with patented genes
D、some of the gene fragments patented contain no real genetic information
答案 D
解析 根据第二段开头的内容可知，基因学家为了获得某一基因串的专利，通常只对基因粗略研究，而并没有仔细了解其中的结构，而且许多基因串所包含的基因信息并没得到确认，因而许多基因串并不真正含有基因信息。另外，从第二段末尾Brace Lehman对科学家申请基因专利的评论也可知D项为答案。
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