已知某物种的一条染色体上依次排列着A、B、C、D、E五个基因,下面

已知某物种的一条染色体上依次排列着A、B、C、D、E五个基因,下面列出的几种改变情况中,未发生染色体结构改变的是

答案

D


解析:

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