3号染色体（Chromosome 3）

人类的每个细胞通常含有46条染色体，分为23对。3号染色体有两个拷贝，分别从父母各继承一条，构成其中的一对。3号染色体约含有1.98亿个碱基对（DNA的基本构建单位），占细胞总DNA的约6.5%。

识别每条染色体上的基因是遗传学研究中的一个活跃领域。由于研究人员使用不同的方法来预测每条染色体上的基因数量，因此估计的基因数量会有所不同。

3号染色体可能包含1,000到1,100个负责提供蛋白质合成指令的基因。这些蛋白质在人体中执行各种不同的功能。

参考文献

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Ensembl Human Map View: Chromosome 3

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UCSC Genome Browser: Statistics