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What are genes?

Tiny groups of chemicals found inside a cell.

How do genes work?

Genes work like instructions, telling each cell how to grow and do its job.

What do genes control?

The way a whole living thing works, what it looks like, and how it survives.

What are genes made up of?

A chemical substance called DNA.

How many cells does a human contain?

Humans contain billions of cells.

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