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2020年7月英语六级听力篇章原文:基因遗传

来源:考试吧 2020-7-11 20:16:17 要考试,上考试吧! 英语四六级万题库
2020年7月英语六级听力篇章原文:基因遗传,更多关于英语六级考试真题答案,请微信搜索“万题库英语四六级考试”或访问考试吧四六级考试网。

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  Passage 2

  Public interest was aroused by the latest discovery of the changed gene in obese life. The news was made by Rockefeller University geneticist Jeffery Friedman. The researchers believe this gene influences development of a hormone that tells the organism how fat or full it is. Those was the changed gene may not sense when they have eaten enough or if they have sufficient fatty tissue. And thus, you can't tell when to stop eating.

  The researchers also reported finding a gene nearly identical to the mouse obesity gene in humans. The operation of this gene in humans has not yet been demonstrated. however. Still, professionals like University of Vermont psychologist Esther Rothblum, reacted enthusiastically: ”This research indicate that people really are born with the tendency to have a certain weight just as they are to have a particular skin color or height”.

  Actually, behavioral geneticists believe that less than half of total weight variation is programmed in the genes, while height is almost entirely genetic determined. Whatever role genes play, Americans are getting fatter. A survey by the Center for Disease Control found obesity has increased greatly over the last ten years. Such rapid change underlines the role of environmental factors like the abundance of rich foods in Americans' overeating. The Center for Disease Control has also found that teens are far less physically active than they were even a decade ago. Accepting that weight is predetermined can relieve guilt for overweight people. But people’s belief that they cannot control their weight can itself contribute to obesity.

  Q12: What does the speaker say has aroused public interest?

  Q13: What do we learn about the changed gene?

  Q14: What does the University of Vermont psychologist Esther Rothblum say? Q15: What accounts for Americans' obesity according to a survey by the Center of Disease Control?

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