若动物的初级精母细胞中同源染色体的对数为n在不�生互换的条件下经非同源染色体自由组合产生的配子种类将有a2n种b4n种cn2种d Template




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tomski若动物的初级精母细胞中同源染色体的对数为n在不�生互换的条件下经非同源染色体自由组合产生的配子种类将有a2n种b4n种cn2种d coloring