7.下列有关基因突变的叙述正确的是 A.不同基因突变的�率是相同的b.基因突变的方�是由环境决定的c.一个基因可以�多个方�突变d.细胞 Template




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tomski7.下列有关基因突变的叙述正确的是 a.不同基因突变的�率是相同的b.基因突变的方�是由环境决定的c.一个基因可以�多个方�突变d.细胞 coloring