由于某种原因某生物体内某条染色体上多了几个或�了几个基因这种遗传物质的变化属于a.基因内部结构的改变 B.染色体结构变异 C.染色体数目 Template




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tomski由于某种原因某生物体内某条染色体上多了几个或�了几个基因这种遗传物质的变化属于a.基因内部结构的改变 b.染色体结构变异 c.染色体数目 coloring