47.控制细胞分裂次数的时钟是位于染色体两端的一种特殊构造随着细胞分裂而变短癌细胞中存在延长染色体端粒的酶正常人的生殖细胞中也有据此 Template




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tomski47.控制细胞分裂次数的时钟是位于染色体两端的一种特殊构造随着细胞分裂而变短癌细胞中存在延长染色体端粒的酶正常人的生殖细胞中也有据此 coloring