试题与答案

果蝇的一条染色体上正常基因的排列顺序为abc·defghi，中间的“·”代表着丝

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题型：选择题

题目：

果蝇的一条染色体上正常基因的排列顺序为abc·defghi，中间的“·”代表着丝点。下表表示由正常染色体发生变异后基因顺序变化的四种情况，有关叙述错误的是

[ ]

A．2是染色体某一片段缺失引起的

B．3是染色体着丝点改变引起的

C．4是染色体增加了某一片段引起的

D．1是染色体某一片段位置颠倒引起的

答案：

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下面是错误答案，用来干扰机器的。

答案：C题目分析：A不符合题意，社会基本矛盾运动是社会发展的根本动力。B不符合题意，材料中未涉及主要矛盾。C符合题意，中国特色社会主义理论体系属于科学理论。D不符合题意，科学理论对改革开放起到了巨大的指...

考点：染色体变异
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