Your Genes, Your Future
How would you feel if someone gave you an envelope with a description of every one of your genes? Supposing this information could tell you what illnesses you were likely to get, or even what illness you might die of, would you open the envelope?
It's a difficult question to answer. But the fact is that scientists have already begun to discover how certain genes influence us. And in the next decade, they will learn a lot more.
We have known for a long time that many of our physical characteristics are inherited(继承). For example, our eye colour and certain diseases are decided by our genes. As long as you have a good diet, scientists can predict your height by looking at your parents' heights. And we now know that the need to wear glasses has a genetic cause. Our eating habits also appear to be decided by our genes!
With other characteristics, things are not so clear. Certainly, scientists have now shown that some traits(特性,特质) are strongly influenced by our genes. Do you prefer getting up early or late? To a great extent, it's your genes that decide. Do you enjoy dangerous sports such as car racing? There is a gene that influences how much excitement we need.
But with most psychological characteristics, scientists are learning that both our genes and our environment affect us. This is true of things such as how violent we are, and how well we get on with other people. So, even though scientists may soon be able to describe our genes in detail, it does not mean they will be able to predict our future with any real success.
Nevertheless, the fact is that scientists will be able to "read" our genes in the near future. This will create new problems. To give a few examples, insurance companies may not want to insure people whose genes predict certain illnesses. Employers may not want to employ people who have a gene for violence. One thing is already clear -- with these new developments, life is going to become even more complicated!
1. Which characteristics is mostly likely to be inherited?A.Eye color. | B.Interest. |
C.Future. | D.Ability. |
A.You may die of a certain illness described in the envelope. |
B.There will be an increased number of violent people. |
C.People may take part in dangerous sports such as car racing. |
D.Insurance companies may refuse to insure people with a gene for certain disease. |
A.Because we’re affected not only by our genes but also by our environment. |
B.Because scientists will not be able to read our genes in the near future. |
C.Because life in the future will be more complicated. |
D.Because scientists can’t describe our genes in detail. |
相似题推荐
【推荐1】If you want to slow aging, you might want to eat less. This finding is good news—if you were a mouse. The researchers studied mice, not people.
John Price and other researchers studied two groups of mice. One group was able to eat as much as it wanted. The researchers limited what the mice in the other group ate. Their diet had 35 percent fewer calories than the first group of mice.
Price says the mice with the diet restrictions were more energetic and suffered fewer disease. They were not just living longer but seemed to stay younger for a longer period of time.
The researchers found that fewer calories slow down a natural mechanism in cells called ribosomes. Price explains that ribosomes are responsible for making important proteins in the cells. But with fewer calories, they slow down. This gives the cells more time to repair themselves.
The researchers say ribosomes use from 10 to 20 percent of the cell’s energy to make those proteins. Price wrote that because of this, it is impractical to destroy an entire ribosome when it starts to break down. However, repairing individual parts of the ribosome on a regular basis enables ribosomes to continue producing high quality proteins for longer than they would otherwise. This top quality production, in turn, keeps cells and the entire body functioning well.
Price said, “ribosome is a very complex machine, like a car.” “They need maintenance to replace the parts that wear out the fastest. When tires wear out,” he explained,” you don’t throw the whole car away and buy a new one. It costs less to replace the old tires.”
“Food,” he said, “isn’t just material to be burned—it’s a signal that tells our body and cells how to respond.” Price said the findings help to explain how exactly our bodies age. And this may “help us make more educated decisions about what we eat.”
1. What can we know about the mice with limited calories from the study?A.They can keep healthy easily. |
B.They need more energy to be active. |
C.They can look younger than they are. |
D.They will live a longer life like humans. |
A.They will completely break down. |
B.They make proteins in the cells slowly. |
C.They will produce high quality proteins more. |
D.They may need more time to repair themselves. |
A.telling a story | B.listing basic data |
C.making comparisons | D.experimenting on mice |
A.Food decides how long you live. |
B.Can you slow down your aging process? |
C.Eating less may help you live longer. |
D.Should your diet be reduced for your health? |
【推荐2】If you’ re a sports fan, you may be familiar with the emotional rollercoaster that comes with sports audience. Whether you’ re part of a buzzing crowd in a stadium, or just watching at home on TV, it’s easy to get caught up in the highs and the lows when you celebrate or commiserate with your favourite team or athlete.
Those feelings are so strong, in fact, that a study from Croatia, published in PubMed, showed that the emotional stress during a football match increased the risk of a cardiovascular (心血管的) incident.
But can watching sports be good for you too? The evidence suggests that people who watch live sporting events experience greater wellbeing than those who don’t. A study published in Frontiers in Public Health by the Anglia Ruskin University in the UK, found sports spectators felt less lonely and had higher scores for life satisfaction. Lead author Helen Keys said in a press release, “Watching live sport of all types provides many opportunities for social interaction and this helps to forge group identity and belonging.” She says this then reduces loneliness and boosts wellbeing. But, if for any reason you aren’t keen on going to live events, don’t worry! Watching sports on TV or on the Internet may also have great benefits, according to a study by Tsuji and colleagues.
They found that older adults who watched sports were less likely to have depressive symptoms than those who didn’t. On top of that, the sports watchers tended to have richer social networks than non-watchers. The authors suggest that the social networks you gain through watching sports may lower the risk of depressive symptoms. So, the cheers at a live sports event or even casual chit-chat with friends about your favourite team can bring a friendship and may reduce loneliness and depression.
It seems the health benefits of sports are not limited to physical activity through participation in them, but that we can make gains in our general wellbeing through social bonding.
1. What does the underlined word “commiserate” in paragraph 1 mean?A.Agree. | B.Struggle. | C.Sympathize. | D.Correspond. |
A.Benefits of doing sports. | B.Loneliness in sports men’s life. |
C.Positive effects of watching sports. | D.Players’ satisfaction with their performance. |
A.To demonstrate watching sports can improve physical health. |
B.To praise older people’s high spirit while watching sports. |
C.To advocate the senior taking sports instead of watching. |
D.To show sports watching reduces risk of mental diseases. |
A. | B. | C. | D. |
【推荐3】You can misremember something just seconds after it happened, reframing events in your mind to better fit with your own preconceptions (预想).
Marte Otten at the University of Amsterdam in the Netherlands and her colleagues wanted to figure out the relationship between previous expectations and short-term memories. The team conducted several experiments on more than 400 people that involved showing the participants random letters arranged in a circle on a computer screen.
In the simplest form of this experiment, the participants were shown the letters for a quarter of a second before the screen went blank. After a gap of 3 seconds, a box appeared where one of the letters had been for half a second, followed by a different circle of letters for half a second. The participants were asked to recall which letter from the original circle had been in the position held by the box on the screen. Crucially, some of the letters were flashed, which Otten calls “fake-letters”. The participants were clearly warned not to mistake them for real ones. This test was repeated.
After recalling the letters, the participants were asked to rate their confidence in each answer. The team focused its analysis on the most confident participants, in order to remove random guesses. The researchers found that, when asked to recall the position of a fake-letter, the confident participants incorrectly gave the answer as its real letter 39 per cent of the time, despite their high confidence in the answer.
“People seem to be sensitive to this memory illusion(错觉) where they already have a preset concept of what the world should look like. This effect appears to be due to a feature of our neural system that relies on generating predictions about the world. We expect to see normal letters when reading. These predictions are normally quite helpful and efficient in normal life and this is not something we have control over,” says Otten.
Several studies have previously shown that long-term memory is unreliable and affected by previous expectations. This new study reveals that the same is true for short-term memories.
1. What did the participants see on the computer during the experiment?A.Random letters hidden in a box. | B.Random letters lined in a circle. |
C.Random boxes arranged in a circle. | D.Random circles showed in a box. |
A.To introduce the topic of the passage. | B.To unfold the process of the experiment. |
C.To present the result of the experiment. | D.To show the background of the research. |
A.By focusing on the least confident participants. |
B.By showing participants’ letters after 3 seconds. |
C.By changing letters’ positions from a different circle. |
D.By analyzing participants’ confidence in each answer. |
A.Short-term memories can be affected by preconceptions. |
B.Long-term memories are unreliable and easily affected. |
C.Memory illusion relies on predictions about the world. |
D.Our predictions about the world can be controlled. |
【推荐1】The summer months are fast approaching, and the excitement of new adventures and outdoor experiences are on the horizon (地平线). Now is the time to start booking locations for camping and van sites. But where to go? Which one to choose? Here are some useful tips for you.
Choosing the best campground location
Everyone has different needs when it comes to booking an ideal spot for spending time outdoors. Contact the campground directly and well in advance and ask what campsites and areas tend to be the best fit for what you’re looking for, such as family-friendly, older crowds or quieter grounds. For a less crowded experience, book your stay during the week instead of the weekend. Some of the most popular destinations for camping in America include the Great Smoky Mountains National Park, which boasts (拥有) wildflowers, hiking and a scenic 11-mile ring road that can be walked or cycled; Yosemite National Park is one of the most popular places to put up a tent, with 13 campgrounds to choose from, including camping with an RV; the Mojave and the Colorado desert meet at Joshua Tree National Park, an ideal spot to park an RV.
Where to set up a tent
Location! This is vital when considering where you will be setting up shop, especially when it comes to a good night’s rest. Find a flat and dry campsite and build the tent on higher ground in case it rains so it won’t get flooded. Look for natural elements to help keep you warm. Trees and large rocks will keep the wind out and the warmth in. Be aware that the campsite should be close to things such as toilets, water, roads and playgrounds.
1. What should you do to have a pleasant camping?A.Telephone the campground on arrival. | B.Choose to go with friendly families |
C.Go camping during the week. | D.Set up the tent on the weekend. |
A.The Colorado desert. | B.Joshua Tree National Park. |
C.Yosemite National Park. | D.The Great Smoky Mountains National Park. |
A.On the level and warm place. | B.On the high and flat place. |
C.Next to large rocks. | D.On the place near big trees. |
【推荐2】Ancient China produced many types of beautiful works of art. Among them, calligraphy, poetry and painting are the most famous. Often they would be put together in art.These became important starting with the Song Dynasty.
Calligraphy is the art of handwriting. In the old times the Chinese considered writing as an important form of art. Calligraphers would practice for years to learn to write perfectly, but with style. Each of the over 40,000 characters needed to be written correctly. And each stroke (笔画) in a character had to be written in a certain order.
Poetry is also an important form of art. Great poets were famous all over the country, and all educated people were expected to write poetry. During the Tang Dynasty poetry was so important that writing poetry was part of the examinations to become a civil servant (文官) and work for the government.
Chinese painting is often connected with calligraphy. It is one of the oldest artistic traditions in the world. The most traditional way of Chinese painting is known as “national painting” or “native painting” which is quite different from Western painting. People can draw mountains, buildings, birds, trees and water.
1. Calligraphers needed to write over ______ characters correctly in the old times.A.10,000 | B.20,000 |
C.30,000 | D.40,000 |
A.Painting. | B.Calligraphy. |
C.Writing poetry. | D.Playing music. |
A.Chinese art. | B.Chinese examinations. |
C.Chinese history. | D.Chinese dynasties. |
【推荐3】If English means endless new words, difficult grammar and sometimes strange pronunciation, you are wrong. Haven’t you noticed that you have become smarter since you started to learn a language? According to a new study by a British university, learning a second language can lead to an increase in your brain power. Researchers found that learning other languages changes grey matter. This is the area of the brain which processes information, It is similar to the way that exercise builds muscles.
Scans (扫描) showed that grey matter density (密度) in the brain was greater in bilinguals than in people without a second language.
“Our findings suggest that the structure of the brain is changed by the experience of learning a second language,” said the scientists. It means that the change itself increases the ability to learn.
Professor Dylan Vaughan Jones of the University of Wales, has researched the link between bilingualism and maths skills. “Having two languages gives you two windows on the world and makes the brain more flexible,” he said, “You are actually going beyond language and have a better understanding of different ideas.”
The findings were matched in a study of native Italian speakers who had learned English as a second language between the ages of two and thirty-four. Reading, writing, and comprehension were all tested, The results showed that the younger they started to learn, the better, “Studying a language means you get an entrance to another world, ”explained the scientists.
1. If you are learning a second language, how will you be?A.Lazier. | B.Happier. | C.Smarter. |
A.Diseases. | B.Emotion. | C.Information. |
A.The ability to speak one language. |
B.The ability to speak two languages. |
C.The ability to speak three languages |
A.Writing, listening, and reading. |
B.Reading, writing, and translating. |
C.Writing, comprehension, and reading. |