Zoom in on a chromosome, and you will find that it is not (as often drawn) a haphazard tangle of DNA, nor even a single object, but a dynamic assembly of DNA, proteins and other chemicals.

• 如果将镜头朝染色体拉近，我们会发现染色体并不像一般绘制的那样，由DNA随意纠缠而成，同时它也不是单一物件，而是由DNA、蛋白质及其他化学物质形成的动态组合。