On June 26,2000,two scientists,called Francis Collins and Cr

On June 26,2000,two scientists,called Francis Collins and Craig Venter,told the world that they could now read the whole “map” of the human body:DNA.DNA is something that everybody has,and it tells the body what to do.DNA is the reason that we look like our mother and father,because we get some of their DNA to make our own.People have been trying to understand the human body for a long time.In 1860,Gregor Mendel discovered a special reason why we look the same as other people in our family.It is because of small things named “genes” in our body.In 1953,James Watson and Francis Crick made another discovery and found out that those small parts are real messages written in the DNA with a special language.In 1961,Marshall Nirenberg and Johann Matthaei found a message in DNA showing how DNA tells the cell (细胞) to build its parts.Scientists have now found all the words in the DNA map,but we still do not understand what they all do.By understanding what just one “word” means,we can help save more people from several illnesses.Most people hope that this will help make better medicine and help sick people.Other people worry that when people begin to know more words and find out lots of other information,we might use it in a wrong way,just to make people more attractive,or stop sick people from getting jobs.Man would have to meet a lot of trouble if DNA technic wasn’t limited in use.

2000年6月26日,名为弗朗西斯·柯林斯和克雷格·文特尔两位科学家向世界宣布,他们能够阅览人类身体的完整“地图”：DNA.DNA是每个人都有的东西,并且它能告诉我们身体该做什么.DNA是我们长的像父母的原因,因为我们从他们哪里获得一部分DNA来组成自己的.人们长久以来就在试图了解自己的身体.1860年,孟德尔发现了为什么我们长得像家里其他人的特殊原因,这是因为我们身体里的名为“基因”的小东西.1953年,詹姆斯沃森和弗朗西斯克里克有了别的发现,他们发现这些小东西的真正信息是被一种特殊语言写在DNA上.1961,年马歇尔尼伦伯格和约拿·马太发现了DNA上一则信息即DNA是如何指导细胞的形成.科学家们现在已经发现了DNA蓝图上的全部语言,但是我们依然不知道他们都是做什么的.通过理解其中一种语言的作用,我们能够拯救更多的人免于严重的疾病.多数人认为这或许能够帮助生产更好的药物来帮助病人.另一部分人则担心当人们开始知道更多的这类语言并发现更多其他信息的时候,我们或许会错误的使用它,仅仅是为了让人们更具吸引了或着阻止病人获得工作.如果DNA技术无限制的使用,人们将面临许许多多的问题.
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