How does your DNA know where it is in your body and which body part to grow into?
In: Biology
Early on, cells in an embryo “know” whether they are on the outside or inside, top or bottom. They then turn on certain genes and turn off others. This makes the cells increasingly specialized. The cells send signals to each other which become more and more complex, until you get certain tissues and organs in particular places and arms and feet where they are supposed to go.
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