7.染色体主要是由dna和蛋白质组成.其中dna是生物的主要遗传物质.一般情况下在生物的体细胞内染色体是成对存在的位于染色体上的基因也是 Template




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tomski7.染色体主要是由dna和蛋白质组成.其中dna是生物的主要遗传物质.一般情况下在生物的体细胞内染色体是成对存在的位于染色体上的基因也是 coloring