Question

【题目】阅读短文，根据短文内容判断下列句子的正(T)误(F)。

People’s appearance (外貌) depends on things called genes (基因). Genes are found in the cells (细胞) of people’s bodies, and they are passed on from parents to children. Here are some facts about eyes.

Many Europeans and Americans can have blue, green or brown eyes. But a brown-eyed person, for example, may also carry genes for another colour in his body. So two brown-eyed or green-eyed parents may not have a child with the same colour eyes. If a child’s father and mother both have brown eyes, their child will probably also have brown eyes, but this is not certain.

If one parent has blue eyes and one has brown eyes, their child may have either blue eyes or brown eyes, but most will probably have brown eyes. The gene for blue eyes is recessive (隐性的) and the gene for brown eyes is dominant (显性的). This means that if a child gets a gene for blue eyes and also a gene for brown eyes from one of his parents, brown will win, and the child’s eyes will be brown, not blue.

【1】Children look like their parents because they get genes from their parents.

【2】A brown-eyed child only carries the gene for brown eyes in his body.

【3】If a child has brown eyes, one of his parents may have other colour eyes.

【4】If a child’s father and mother both have green eyes, the child’s eyes must be green.

【5】If one parent has blue eyes and one has brown eyes, their child mostly has brown eyes.

Answer 1

【答案】

【1】T

【2】F

【3】T

【4】F

【5】T

【解析】

文章讲述了人的基因会遗传给后代，有隐性基因和显性基因，它们决定着孩子跟父母的某些特征关系。

【1】阅读判断题，根据Genes are found in the cells（细胞）of people's bodies，and they are passed on from parents to children，可知基因可以遗传给孩子，所以孩子看起来像父母，故答案为T。

【2】阅读判断题，根据But a brown-eyed person，for example，may also carry genes for another colour in its body．可知一个褐色眼睛的人，也可能身体里携带着别的颜色的基因，题干叙述错误，故答案为F。

【3】阅读判断题，根据So two brown-eyed or green-eyed parents may not have a child with the same colour eyes因此，两只棕色眼睛或两只绿色眼睛的父母可能没有一个有着同样颜色眼睛的孩子，可知一个褐色眼睛的孩子，它的爸爸（妈妈）可能有其他颜色的眼睛，故答案为T。

【4】阅读判断题，根据If a child's father and mother both have brown eyes，the child will probably also have brown eyes，but this is not certain如果一个孩子的父亲和母亲都有褐色的眼睛，孩子可能也有棕色的眼睛，但这也不绝对．可知如果一个孩子的爸爸和妈妈都是绿色的眼睛，孩子的眼睛是绿色的可能性很大，也不绝对是绿色的眼睛，题干叙述错误，故答案为F。

【5】阅读判断题，根据If one parent has blue eyes and one has brown eyes，their children may have either blue eyes or brown eyes，but most will probably have brown eyes，可知当父母一个是蓝色的眼睛一个是褐色的眼睛，孩子的眼睛颜色可能是蓝色也可能是褐色，但大多数是褐色的眼睛，故答案为T。