A gene is the master instruction that describes to a cell how to make a particular molecule. Since our entire body is made up of molecules of one kind or another, genes can have very profound effects on what our body does and how it does it. A gene is stored in the cell using a substance called DNA. People get their genes from a mixing of their parents’ genes. Genes even describe how to make the cells reading the genes – this sounds very confusing, even impossible! However, the body solves it by starting life with special cell called an egg, which comes with some of the reading equipment ready-made.

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