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Genetics

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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.