下列叙述哪一项是正确的a生物体的遗传物质都在细胞核内b生物的体细胞经过分裂产生的新细胞与原来的细胞相比其染色体和dna数目减�了一半c Template




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tomski下列叙述哪一项是正确的a生物体的遗传物质都在细胞核内b生物的体细胞经过分裂产生的新细胞与原来的细胞相比其染色体和dna数目减�了一半c coloring