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SSS 2009-08-28

时间:2010-05-18 06:30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)

You can’t judge a book by its cover. But you can judge a dog by its coat. You can even read right through to its genes2. Because a study in the August 27th online issue of Science shows that just three key genes govern the length and texture3 of dog fur.

Domestic dogs come in a stunning4 variety of shapes and sizes, and different breeds wear different coats. They can have short hair or long hair, or fur that’s straight, wavy5, curly, wiry or smooth. To find the genes responsible for this furry6 rainbow, scientists scanned the DNA7 of a thousand individual dogs from 80 different breeds. And they found that every coat’s appearance boils down to three simple traits: length, curl and texture. And that each of these traits is controlled by just one gene1.

So, a long-haired Golden retriever has one variant8 of a gene called FGF5, whereas a short-haired lab has another. By mixing and matching variants9 of these three genes, you get everything from a curly-haired poodle to a wire-haired Scottie with bushy eyebrows10 and a droopy moustache.

Which is probably more than you’ll ever need to know about the hair of the dog that bit you.

—Karen Hopkin
 


点击收听单词发音收听单词发音  

1 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。
2 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
3 texture kpmwQ     
n.(织物)质地;(材料)构造;结构;肌理
参考例句:
  • We could feel the smooth texture of silk.我们能感觉出丝绸的光滑质地。
  • Her skin has a fine texture.她的皮肤细腻。
4 stunning NhGzDh     
adj.极好的;使人晕倒的
参考例句:
  • His plays are distinguished only by their stunning mediocrity.他的戏剧与众不同之处就是平凡得出奇。
  • The finished effect was absolutely stunning.完工后的效果非常美。
5 wavy 7gFyX     
adj.有波浪的,多浪的,波浪状的,波动的,不稳定的
参考例句:
  • She drew a wavy line under the word.她在这个词的下面画了一条波纹线。
  • His wavy hair was too long and flopped just beneath his brow.他的波浪式头发太长了,正好垂在他的眉毛下。
6 furry Rssz2D     
adj.毛皮的;似毛皮的;毛皮制的
参考例句:
  • This furry material will make a warm coat for the winter.这件毛皮料在冬天会是一件保暖的大衣。
  • Mugsy is a big furry brown dog,who wiggles when she is happy.马格斯是一只棕色大长毛狗,当她高兴得时候她会摇尾巴。
7 DNA 4u3z1l     
(缩)deoxyribonucleic acid 脱氧核糖核酸
参考例句:
  • DNA is stored in the nucleus of a cell.脱氧核糖核酸储存于细胞的细胞核里。
  • Gene mutations are alterations in the DNA code.基因突变是指DNA密码的改变。
8 variant GfuzRt     
adj.不同的,变异的;n.变体,异体
参考例句:
  • We give professional suggestions according to variant tanning stages for each customer.我们针对每位顾客不同的日晒阶段,提供强度适合的晒黑建议。
  • In a variant of this approach,the tests are data- driven.这个方法的一个变种,是数据驱动的测试。
9 variants 796e0e5ff8114b13b2e23cde9d3c6904     
n.变体( variant的名词复数 );变种;变型;(词等的)变体
参考例句:
  • Those variants will be preserved in the'struggle for existence". 这些变异将在“生存竞争”中被保留下来。 来自辞典例句
  • Like organisms, viruses have variants, generally called strains. 与其他生物一样,病毒也有变种,一般称之为株系。 来自辞典例句
10 eyebrows a0e6fb1330e9cfecfd1c7a4d00030ed5     
眉毛( eyebrow的名词复数 )
参考例句:
  • Eyebrows stop sweat from coming down into the eyes. 眉毛挡住汗水使其不能流进眼睛。
  • His eyebrows project noticeably. 他的眉毛特别突出。
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