BBC英语教学:英国研究团队编辑人类胚胎中的DNA

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来源: 新浪教育 作者: 编辑:周晓宇 2017-09-30 14:51:26

  BBC英语教学

  DNA是生命的蓝图。英国的一组研究者已在试验中修改了人体胚胎的构造,这是英国首例。这个来自弗朗西斯·克里克研究所(The Francis Crick Institute)的团队即将解开有关人类生命起始的谜题之一。了解卵子受精后的情况可以帮助研究者寻找改进试管受精技术的方式,同时也可以解释一部分女性流产的原因。请听报道。

  This research is unlocking the mysteriesof life. We all started offas a single fertilised eggthat grows into a body made of billions of cells, yet the first few steps are as critical as they're poorly understood.

  The team at the Francis Crick Institute is investigating instructionsin our DNA known as genes that are highly activein the week after fertilisation. By editing DNA to turn genes off, they can work out what they do.

  Their first experiments published in the journal Nature show how instructions called OCT4 are essential for helping the embryogrow from a single cell to a hollow sphere called a blastocyst.

  Researcher Dr Kathy Niakan says getting a complete understanding of early development could help infertilecouples. These experiments have been legal since 2008 and have been recently made possible by rapid advances in the field of gene editing.

  The work of the Crick in London is a featof pure scientific discovery and the embryos will never be implantedin the womb. But other groups are working on modifyingembryos to eliminate inherited diseases.

  Dr Sarah Chan, a bioethicistat the University of Edinburgh says the field is posing big questions for society. Gene editing is a technology with a potential to transform our understanding of human biology and medicine.

  词汇表

  unlocking the mysteries即将解开…的奥秘

  started off以…的形式开始

  fertilised egg受精卵

  instructions遗传指令

  highly active高度活跃

  embryo胚胎

  blastocyst (生物学)胚泡

  infertile不能生育的

  gene editing基因编辑(技术)

  feat成就,功绩

  implanted (经手术)植入

  modifying改造、改变

  inherited diseases遗传疾病

  bioethicist生物伦理学家

  transform彻底改变

  测验

  请听报道并回答下列问题。

  1. What is the team at Francis Crick Institute investigating?

  2. What has recently made these experiments possible?

  3. True or false?According to bioethicist Dr Sarah Chan, no one needs to worry about the field.

  4. Which word in the text means ‘improvements or developments’?

  答案

  1. What is the team at Francis Crick Institute investigating?

  The team at the Francis Crick Institute is investigating instructions in our DNA known as genes that are highly active in the week after fertilisation.

  2. What has recently made these experiments possible?

  These experiments have been recently made possible by rapid advances in the field of gene editing.

  3. True or false?According to bioethicist Dr Sarah Chan, no one needs to worry about the field.

  False. Dr Sarah Chan says the field is posing big questions for society.

  4. Which word in the text means ‘improvements or developments’?

  Advances.

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