虽然人类的染色体组很多部分都是相同的，但是微小的基因差别也许会对应他们在疾病上的不同感受和在治疗后的不同反应。
Although humans share most of their genome with one another, slight genetic differences may correspond to variation in their susceptibility to diseases and responses to therapeutics.
无论如何，如果我们检查这些螺旋状 DNA 的末端，我们会发现每条人类染色体的末端都有一个被称作“端粒”的 DNA 序列。
Anyway, if we examine these ends of these coils of DNA, we will find a sequence of DNA at each end of every human Chromosome, called a telomere.
像许多有性繁殖的物种一样，人类有特殊的性染色体。
Like many sexually reproducing species, humans have special gonosomes.
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