Doyouhavebrownhair?Areyoutallerthanotherkidsyourage?...

问题详情：

    Do you have brown hair? Are you taller than other kids your age? These characteristics

were decided before you were born. You got your traits from your parents. They passed their

traits on to you through genes (基因).

    Genes carry codes (代码) for blue eyes or brown eyes. Genes say how tall you will get

and what color hair you will have. You got half of your genes from your mother. You got half

of your genes from your father. So you have your own set of genes. Each person gets different genes for each body part. That is why you look like but not exactly like your brother or sister.

    A dominant (显*的)  gene shows up most of the time. Brown eyes are dominant over

bluc eyes. A recessive (降*的)  gene shows up less often. light hair comes from a recessive

gene. Dark hair is more common. Look at the eye color and hair color of the people around

you. You will see that this is true.

    Genes help to make you who you are. But they don't tell the whole story. Your genes

may help you to be fast and strong. But you still need to learn how to run or swim or skate

wel.

1. The underlined word “traits” in Paragraph 1 means________.2

   A. charactcristics    B. expericnces    C. achievements      D. possibilities

2. According to Paragraph 3, you can see most of the people around you have______.

A. brown eyes with dark hair     B. brown eyes with light hair

C. blue eyes with dark hair       D. blue eyes with light hair

3. What is the passage mainly about?

A. Genes carry codes for eyes and hair.   B. Genes help to make you who you are.

C. Genes help you to be fast and strong.  D. Genes make brothers look similar.

【回答】

1．A 2．A  3.B

知识点：日常生活类

题型：阅读理解