DNA is a substance that makes up genes．Everything alive has genes. Plants have genes. Animals have genes. You have genes. Genes are the basic units of heredity. Heredity means all the characteristics 题目和参考答案——青夏教育精英家教网—

题目内容

DNA is a substance that makes up genes．Everything alive has genes. Plants have genes. Animals have genes. You have genes. Genes are the basic units of heredity. Heredity means all the characteristics you inherit from your parents. You get your genes from your parents. You inherit half of your genes from your mother． You inherit half of your genes from your father． Genes are a kind of code． A tree’s genes tell what shape its leaves will be． A cat’s genes tell what color its fur will be． Your genes tell what color your eyes will be．Your genes tell what color your hair will be．Everything about you comes from the code in your genes．Genes line up on strands called chromosomes in cells．Everything alive is made up of cells．Chromosomes are in the center, or nucleus, of cells．

An Austrian monk named Gregor Mendel first saw inherited patterns in pea plants．He experimented with pea plants in the 1860s．One of the things, or traits, Mendel studied was what makes some pea plants tall and some short． He said that the traits （特征） must come from units of heredity （遗传）passed from the parent plants．These units were called genes．

In the mid-1900s, scientists discovered that genes are made of DNA． In the 1970s, scientists learned how to change DNA with genetic engineering．Scientists also learned that problems with certain genes cause diseases．Muscular dystrophy, cystic fibrosis, and hemophilia are some genetic diseases—diseases caused by problems in genes． Today, scientists are looking for ways to cure genetic diseases by altering genes through a process called gene therapy．

1． If one's father has blue eyes, while his mother has grey ones, _________．

A． their son will have blue eyes．

B． Their son is sure to have grey eyes．

C． their son's eyes will share both that of father's and mother's．

D． It is probable that their son will have either blue eyes or grey ones．

2． Which is the correct from large to small?

A． genes---chromosomes---cells B． cells---chromosomes---genes

C． chromosomes---cells---genes D． cells---genes---chromosomes

3． In the second paragraph, the author tells us ___________．

A． Gregor Mendel discovered genes

B． Gregor Mendel was an expert in plants

C． Gregor Mendel did a lot of experiments with pea plants

D． Something that happened to an Austrian monk

4． In the last sentence, the word "altering" can best be replaced by __________．

A． changing B． preserving C． deserving D． digesting

DBAA

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DNA is a substance（物质） that makes up genes. Everything alive has genes. Plans have genes. Animals have genes. You have genes.

Genes are the basic units of heredity（遗传）. Heredity means all the characteristics you inherit from your parents. You get your genes from your parents. You inherit half of your genes from your mother. You inherit half of your genes from your father.

Genes are a kind of code. A tree’s genes tell what shape its leaves will be. A cat’s genes tell what color its fur will be. Your genes tell what color your eyes will be. Your genes tell what color your hair will be. Everything about you comes from the code in your genes.

Genes line up on strands（链） called chromosomes（染色体） in cells. Everything alive is made up of cells. Chromosomes are in the center, or nucleus, of cells.

Different parts of you are made of different kinds of cells. Your muscles are made of muscle celIs. Your skin is made of skin cells. The code in your genes tells your body to make different kinds of cells. The genes in each cell tell the cell how to work. They tell the cell when to make new copies of itself.

An Austrian monk named Gregor Mendel first saw inherited patterns in pea plants. He experimented with pea plants in the 1860s. One of the things, or traits（特质）， Mendel studied was what makes some pea plants tall and some short. He said that the traits must come from units of heredity passed from the parent plants. These units were later called genes.

In the mid-1900s, scientists discovered that genes are made of DNA. In the 1970s, scientists learned how to change DNA with genetic engineering. Scientists also learned that problems with certain genes cause diseases. Muscular dystrophy, cystic fibrosis, and hemophilia are some genetic diseases-diseases caused by problems in genes. Today, scientists are looking for ways to cure genetic diseases by changing genes through a process called gene therapy.

What is DNA?

A. DNA is a kind of gene.

B.. DNA is a substance that makes up genes.

C. DNA is the basic unit of heredity.

D. DNA is a measure to protect crime.

Which of the following about genes is correct according to the passage?

A. Plants, animals and human beings have the same genes.

B. Half people inherit all genes from their mother, others from their father.

C. Genes decide the trees shapes, the cats’ fur color and our eyes’ color as well.

D. Genes will give you a code when you need them.

Where are genes?

A. Genes lining up on strands called chromosomes are in the center of cells.

B. Genes hide in everything alive in your body.

C. Genes can be nowhere but in your mind, controlling all your actions.

D. Genes travel in your body and help cope skin, muscle, and eyes.

An Austrian monk named Gregor Mendel .

A. first saw inherited patterns in people

B. was interested in why plants were different

C. first called the units of heredity from parents genes

D. was the first who discovered genes

We can conclude that .

A. scientists were less intelligent than monks in 1900s

B. some genes are bad and can cause diseases

C. we don’t need to worry about genetic diseases any longer

D. the discovery of genes may be of great help in our daily life

Several years ago, a student working on a research project in my laboratory approached me with concern.“I’m doing something wrong,”she exclaimed. I had seen her research results and knew she was making good progress, so I was surprised to hear that she was having a problem. Over the next several days we went through her experiment; yet I could not find a problem. Finally, I asked her,“Why do you think you’re doing something wrong?” “Because I’m not getting what you said I should get,”she replied with some confusion.
Her response shocked me. I had not told her what she“should get”, but we had discussed some published hypotheses(假说) several weeks earlier. On seeing the research data that did not fit these predictions, I recognized that she had a new finding and came to change my hypotheses. But she was interpreting her results as a mistake. With almost four years of a college science major behind her, this student still had the common misunderstanding that science is a boring exercise in proving something we already know to be true.
But how can this happen? Throughout school, science is often described in textbooks as a series of“known”facts and figures; for example, DNA is a double helix; earthquakes occur at plate boundaries, etc. Unfortunately, the process by which these discoveries were made and how they fit into scientific progress are often ignored in the classroom. These details help show the nature of scientific discoveries and the tails help show the nature of scientific discoveries and the skepticism(质疑) that goes with new discoveries before they are accepted.
Understanding science is more than memorizing that DNA is a double helix. It is to have the ability to take in new information on diet, exercise, or disease and apply it to our own lives. Understanding the process of science and scientific problem-solving can help us make better decisions every day.
【小题1】The student thought her research project had gone wrong because .

A．she was not making progress

B．her teacher told her so

C．she couldn’t get enough data

D．she had some unexpected findings

【小题2】How did the writer feel when he found out the reason for the student’s confusion?

【小题3】What is to blame for the student’s misunderstanding about science?

A．Her own carelessness.

B．Her teacher’s lack of experience.

C．The method of science education.

D．The publication of some wrong hypotheses.

【小题4】What is the last paragraph mainly about?

A．The meaning of understanding science.

B．How to use known facts.

C．The best way to make scientific discoveries.

D．How to use scientific knowledge in daily life.

Have you ever heard a news reporter talk about DNA? Reporters talk about DNA found at the scene of a crime. They talk about police finding DNA “fingerprints.” Police sometimes use DNA as a clue to find out who committed the crime.
DNA is a substance（物质） that makes up genes. Everything alive has genes. Plans have genes. Animals have genes. You have genes.
Genes are the basic units of heredity（遗传）. Heredity means all the characteristics you inherit from your parents. You get your genes from your parents. You inherit half of your genes from your mother. You inherit half of your genes from your father.
Genes are a kind of code. A tree’s genes tell what shape its leaves will be. A cat’s genes tell what color its fur will be. Your genes tell what color your eyes will be. Your genes tell what color your hair will be. Everything about you comes from the code in your genes.
Genes line up on strands（链） called chromosomes（染色体） in cells. Everything alive is made up of cells. Chromosomes are in the center, or nucleus, of cells.
Different parts of you are made of different kinds of cells. Your muscles are made of muscle celIs. Your skin is made of skin cells. The code in your genes tells your body to make different kinds of cells. The genes in each cell tell the cell how to work. They tell the cell when to make new copies of itself.
An Austrian monk named Gregor Mendel first saw inherited patterns in pea plants. He experimented with pea plants in the 1860s. One of the things, or traits（特质）， Mendel studied was what makes some pea plants tall and some short. He said that the traits must come from units of heredity passed from the parent plants. These units were later called genes.
In the mid-1900s, scientists discovered that genes are made of DNA. In the 1970s, scientists learned how to change DNA with genetic engineering. Scientists also learned that problems with certain genes cause diseases. Muscular dystrophy, cystic fibrosis, and hemophilia are some genetic diseases-diseases caused by problems in genes. Today, scientists are looking for ways to cure genetic diseases by changing genes through a process called gene therapy.
【小题1】 What is DNA?

A．DNA is a kind of gene.

B．DNA is a substance that makes up genes.

C．DNA is the basic unit of heredity.

D．DNA is a measure to protect crime.

【小题2】 Which of the following about genes is correct according to the passage?

A．Plants, animals and human beings have the same genes.

B．Half people inherit all genes from their mother, others from their father.

C．Genes decide the trees shapes, the cats’ fur color and our eyes’ color as well.

D．Genes will give you a code when you need them.

【小题3】Where are genes?

A．Genes lining up on strands called chromosomes are in the center of cells.

B．Genes hide in everything alive in your body.

C．Genes can be nowhere but in your mind, controlling all your actions.

D．Genes travel in your body and help cope skin, muscle, and eyes.

【小题4】An Austrian monk named Gregor Mendel .

A．first saw inherited patterns in people

B．was interested in why plants were different

C．first called the units of heredity from parents genes

D．was the first who discovered genes

【小题5】 We can conclude that .

A．scientists were less intelligent than monks in 1900s

B．some genes are bad and can cause diseases

C．we don’t need to worry about genetic diseases any longer

D．the discovery of genes may be of great help in our daily life

Her response shocked me. I had not told her what she“should get”, but we had discussed some published hypotheses(假说) several weeks earlier. On seeing the research data that did not fit these predictions, I recognized that she had a new finding and came to change my hypotheses. But she was interpreting her results as a mistake. With almost four years of a college science major behind her, this student still had the common misunderstanding that science is a boring exercise in proving something we already know to be true.

But how can this happen? Throughout school, science is often described in textbooks as a series of“known”facts and figures; for example, DNA is a double helix; earthquakes occur at plate boundaries, etc. Unfortunately, the process by which these discoveries were made and how they fit into scientific progress are often ignored in the classroom. These details help show the nature of scientific discoveries and the tails help show the nature of scientific discoveries and the skepticism(质疑) that goes with new discoveries before they are accepted.

Understanding science is more than memorizing that DNA is a double helix. It is to have the ability to take in new information on diet, exercise, or disease and apply it to our own lives. Understanding the process of science and scientific problem-solving can help us make better decisions every day.

1.The student thought her research project had gone wrong because .