英语听力文摘 English Digest 6、Women See More Color

　　In this Moment of Science Yael and Don discuss how women can see more color.
Yael: Not only are eight percent of men colorblind, but even compared to men who can distinguish between reds and greens, many women may live a more colorful existence. That's because about forty percent of women possess two types of so- called red cones¹, a key gene² involved in enabling one to see the color red.
Don: There aren't any men with two types of this gene?
Y: No. That's because it's located on the X chromosome³.
D: I have one of those.
Y: Yes, you do, but one only, whereas women have two, a distinction that makes for a discrepancy⁴ in how men and women see color. This gene has three times the number of variations of most other genes⁵. Possessing a variation on this gene can inhibit⁶ one's ability to distinguish red from green. But a variation of this gene coupled with a standard version of the gene theoretically may allow one to see more shades of reds and oranges than the average person.
D: And the only way to get such a combination of this gene is to get your hands on two X chromosomes⁷.
Y: Which you, my dear friend, Don, are without.
D: If these women are proven to be able to see a greater range of reds and oranges, is there any advantage or disadvantage to such an ability?
Y: That's yet to be determined⁸. But some scientists think that the ability to distinguish subtleties⁹ in reds and oranges may have meant life or death for our hunter-gatherer ancestors. They hypothesize that since women were the primary gatherers, they needed to be able to distinguish between ripe and unripened foods, as well as between edible¹⁰ berries and poisonous imposters.

1 cones   

n.（人眼）圆锥细胞；圆锥体( cone的名词复数 )；球果；圆锥形东西；（盛冰淇淋的）锥形蛋卷筒

参考例句：

• In the pines squirrels commonly chew off and drop entire cones. 松树上的松鼠通常咬掉和弄落整个球果。 来自辞典例句
• Many children would rather eat ice cream from cones than from dishes. 许多小孩喜欢吃蛋卷冰淇淋胜过盘装冰淇淋。 来自辞典例句

2 gene   

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 chromosome   

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。

4 discrepancy   

n.不同；不符；差异；矛盾

参考例句：

• The discrepancy in their ages seemed not to matter.他们之间年龄的差异似乎没有多大关系。
• There was a discrepancy in the two reports of the accident.关于那次事故的两则报道有不一致之处。

5 genes   

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

6 inhibit   

vt.阻止，妨碍，抑制

参考例句：

• Don't let ego and greed inhibit clear thinking and hard work.不要让自我和贪婪妨碍清晰的思维和刻苦的工作。
• They passed a law to inhibit people from parking in the street.他们通过一项法令以阻止人们在街上停车。

7 chromosomes   

n.染色体( chromosome的名词复数 )

参考例句：

• Chromosomes also determine the sex of animals. 染色体也决定动物的性别。 来自《简明英汉词典》
• Each of four chromosomes divide longitudinally. 四种染色体的每一种都沿着纵向分裂。 来自《现代汉英综合大词典》

8 determined   

adj.坚定的；有决心的

参考例句：

• I have determined on going to Tibet after graduation.我已决定毕业后去西藏。
• He determined to view the rooms behind the office.他决定查看一下办公室后面的房间。

9 subtleties   

细微( subtlety的名词复数 )； 精细； 巧妙； 细微的差别等

参考例句：

• I think the translator missed some of the subtleties of the original. 我认为译者漏掉了原著中一些微妙之处。
• They are uneducated in the financial subtleties of credit transfer. 他们缺乏有关信用转让在金融方面微妙作用的知识。

10 edible   

n.食品，食物；adj.可食用的

参考例句：

• Edible wild herbs kept us from dying of starvation.我们靠着野菜才没被饿死。
• This kind of mushroom is edible,but that kind is not.这种蘑菇吃得，那种吃不得。