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[六级大学英语阅读] 2013年6月英语六级考试备考深度阅读试题模拟与解析(21)

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  It has been called the Holy Grail of modern biology. Costing more than £2 billion, it is the most ambitious scientific project since the Apollo program that landed a man on the moon. And it will take longer to accomplish than the lunar missions, for it will not be complete until next century. Even before it is finished, according to those involved, this project should open up new understanding of, and new treatment for, many of the ailments that afflict humanity.

  The objective of the Human Genome Project is simple to state but audacious in scope: to map and analyze every single gene within the double helix of humanitys DNA. The project will reveal a new human anatomy--not the bones, muscles and sinews, but the complete genetic blueprint for a human being. Those working on the Human Genome Project claim that the new genetic anatomy will transform medicine and reduce human suffering in the 21st century. But others see the future through a darker glass and fear that the project may open the door to a world peopled by Frankensteins monsters and disfigured by a new eugenics.

  The genetic inheritance a baby receives from its parents at the moment of conception fixes much of its later development. The human genome is the compendium of all these inherited genetic instructions. Witten out along the double helix of DNA are the chemical letters of the genetic text, for the human genome contains more than 3 billion letters. On the printed page it would fill about 7,000 volumes. Yet within little more than a decade, the position of every letter and its relation to its neighbors will have been tracked down, analyzed and recorded.

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