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SSS 2009-07-03

时间:2010-05-18 03:08来源:互联网 提供网友:mark@li   字体: [ ]
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    (单词翻译:双击或拖选)

This is Scientific American's 60-second Science. I'm Christie Nicholson. Got a minute?

 We might think perfect pitch is an innate1 talent. Well, a study in the American Journal of Human Genetics is providing some evidence for that. Perfect pitch, aka absolute pitch, is the rare ability to name or recreate musical notes like A or middle C without using any comparable reference. Researchers at the University of California San Francisco studied the results from an online test taken by over ten thousand people. Not surprisingly, individuals tended to either have perfect pitch or not. But in a closer study of 73 families researchers found a region of genes3 on chromosome4 eight in those with perfect pitch and from European ancestry5. More study is needed to zero in on just which gene2 or multiple genes might be responsible. And for comparison, they intend to study individuals without perfect pitch but with equivalent musical training. There is some evidence that babies have the ability for absolute pitch, so researchers for this study theorize that maybe most lose this ability with age, but that what a so-called pitch gene does is extend this talent through a crucial period in childhood.

 

Thanks for the minute for Scientific American's 60-second Science. I'm Christie Nicholson.

 


点击收听单词发音收听单词发音  

1 innate xbxzC     
adj.天生的,固有的,天赋的
参考例句:
  • You obviously have an innate talent for music.你显然有天生的音乐才能。
  • Correct ideas are not innate in the mind.人的正确思想不是自己头脑中固有的。
2 gene WgKxx     
n.遗传因子,基因
参考例句:
  • A single gene may have many effects.单一基因可能具有很多种效应。
  • The targeting of gene therapy has been paid close attention.其中基因治疗的靶向性是值得密切关注的问题之一。
3 genes 01914f8eac35d7e14afa065217edd8c0     
n.基因( gene的名词复数 )
参考例句:
  • You have good genes from your parents, so you should live a long time. 你从父母那儿获得优良的基因,所以能够活得很长。 来自《简明英汉词典》
  • Differences will help to reveal the functions of the genes. 它们间的差异将会帮助我们揭开基因多种功能。 来自英汉非文学 - 生命科学 - 生物技术的世纪
4 chromosome 7rUzX     
n.染色体
参考例句:
  • Chromosome material with exhibits of such behaviour is called heterochromatin.表现这种现象的染色体物质叫做异染色质。
  • A segment of the chromosome may become lost,resulting in a deletion.染色体的一个片段可能会丢失,结果产生染色体的缺失。
5 ancestry BNvzf     
n.祖先,家世
参考例句:
  • Their ancestry settled the land in 1856.他们的祖辈1856年在这块土地上定居下来。
  • He is an American of French ancestry.他是法国血统的美国人。
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