how does instinct work? If it’s just “baked” into an animal’s DNA, how does it “activate” and how does it “activate” successfully?
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DNA is the blueprint for how things in the body get built, dna itself does not play a role in thought or reaction.
The human brain, like all brains, is designed to develop with a whole bunch of pre-installed software, synapse connections, that are default to include things like breathing, blinking, sucking, grabbing and many more. Without this preinstalled software (which came from a genetic .zip file called the dna where it was decompressed from) then we would not survive as babies/children.
The physical portion of the brain that handles “instincts” is the brainstem, the part of the brain closest to the spinalcord. Because it is physically between the spinal cord and the rest of the brain, it is literally able to inject commands to the body without you having to think it.
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