What are genes?

Genes are sections of DNA that are passed from generation to generation and perform one function. If we think of DNA as letters in the alphabet, the genes are words and the chromosomes is a full sentence. All 46 chromosomes then make up the whole book (cell).

There are many genes on each chromosome; we all have 10s of thousands of genes that instruct our bodies on how to develop. Genes are located on chromosomes that are in all our cells, including the sperm and egg that make a baby.

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