Question

【題目】閱讀短文，根據(jù)短文內(nèi)容判斷下列句子的正(T)誤(F)。

People’s appearance (外貌) depends on things called genes (基因). Genes are found in the cells (細(xì)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 (隱性的) and the gene for brown eyes is dominant (顯性的). 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】

文章講述了人的基因會遺傳給后代，有隱性基因和顯性基因，它們決定著孩子跟父母的某些特征關(guān)系。

【1】閱讀判斷題，根據(jù)Genes are found in the cells（細(xì)胞）of people's bodies，and they are passed on from parents to children，可知基因可以遺傳給孩子，所以孩子看起來像父母，故答案為T。

【2】閱讀判斷題，根據(jù)But a brown-eyed person，for example，may also carry genes for another colour in its body．可知一個(gè)褐色眼睛的人，也可能身體里攜帶著別的顏色的基因，題干敘述錯(cuò)誤，故答案為F。

【3】閱讀判斷題，根據(jù)So two brown-eyed or green-eyed parents may not have a child with the same colour eyes因此，兩只棕色眼睛或兩只綠色眼睛的父母可能沒有一個(gè)有著同樣顏色眼睛的孩子，可知一個(gè)褐色眼睛的孩子，它的爸爸（媽媽）可能有其他顏色的眼睛，故答案為T。

【4】閱讀判斷題，根據(jù)If a child's father and mother both have brown eyes，the child will probably also have brown eyes，but this is not certain如果一個(gè)孩子的父親和母親都有褐色的眼睛，孩子可能也有棕色的眼睛，但這也不絕對．可知如果一個(gè)孩子的爸爸和媽媽都是綠色的眼睛，孩子的眼睛是綠色的可能性很大，也不絕對是綠色的眼睛，題干敘述錯(cuò)誤，故答案為F。

【5】閱讀判斷題，根據(jù)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，可知當(dāng)父母一個(gè)是藍(lán)色的眼睛一個(gè)是褐色的眼睛，孩子的眼睛顏色可能是藍(lán)色也可能是褐色，但大多數(shù)是褐色的眼睛，故答案為T。