Comment on How does DNA decide the shape of the body?
lurch@sh.itjust.works 3 weeks ago
to add to what others wrote: cells also signal a bit with each other. they tell each other when they are ready or it’s time to do something, like detach or self destruct, so a flipper can split into fingers.
AFAIK all signals for the formation of a human body are chemical, even though some cells can also produce electricity and light.