That is a very good question, with a not so complicated answer. DNA is what has the instructions for your cell's nucleus, or your genes, in other terms. But how do they replicate? Well, as you know there are four kinds of bases to DNA, and DNA has a double helix shape ( See my The Structure of DNA blog post if you don't know ). But what does that have to do with DNA replicating? I'll tell you what. DNA replicates by pretty much unzipping itself. It breaks the bond between the two bases, and unzips itself. While it is unzipping, with the help of proteins, new nucleotides are put together with the loose ends. It keeps doing this until there are two chromosomes now. Each new DNA has a new strand and an old strand.

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    Author: Vahae O.

    The Science Solutions blogs are about various science subjects. Some of these blogs might help you with various science problems.