将含有一对同源染色体的精原细胞的dna分子用15n标记并供给含14n的原料该细胞进行减数分裂产生的4个精子中含有15n标记的dna的精子 Template




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tomski将含有一对同源染色体的精原细胞的dna分子用15n标记并供给含14n的原料该细胞进行减数分裂产生的4个精子中含有15n标记的dna的精子 coloring