Eli5: How do bones and other organs know what shapes to grown into?

Question

Eli5: How do bones and other organs know what shapes to grown into?

In: 3675

Answer 1

Here is the super ELI5. Imagine you have a puzzle. You remove a bunch of pieces then fold it up. That’s dna. It basically unfolds and combines with the bits floating around until it’s the shape of the puzzle you started with.