Mystery #4Tier 3growing cells
How does one cell in a growing baby know whether to become skin, bone or blood?
A baby begins as a single cell. It splits again and again, and every new cell carries the same DNA. Yet somehow some cells become skin, others become bone, and others become blood. If they all start out identical, how does each cell know what it is meant to turn into?
Your guess
Every cell starts the same, then takes on a job. How do you think a cell knows whether to become skin, bone or blood?
There's no single magic word to type, have a go in your own words, then reveal the answer to see how close you got.
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