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Hi, I want to describe the relative length and size of DNA in a cell. I wish to use some items that students can handle and visualize a microscopic unit with something they can relate.

The lesson will be on 'amazing cells and genes' where I want to use scales to show the relative sizes. I am planning on using a piece of yarn that is the length of DNA in a human cell when stretched to give students an understanding of how DNA is packed into compact and supercoiled chromosomes. If you have any other such suggestions, please let me know. Thanks. Leina


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