The central nervous systems as well as the brain->muscles and sensory cells->brain nervous pathways, need to be precisely wired for life to be possible. Moreover they are wired almost exactly the same way for the individuals of a same species (animal, man, insects, etc.).
This information, must therefore be somehow encoded in the DNA.
I have never heard of any study or theory on how this would be possible - only about how proteins are encoded, and I couldn't find any bit of information on this topic (I am not a biologist though).
I would like to have a broad idea of what is currently know about the construction of such networks, i.e. not detailed explanation but rather takeaways facts and references.
- How is information about neural connections encoded in the DNA?
e.g. are there any genes linked with neurons (e.g. coding for neurotransmitters)? Do the DNA code for precise neural connections? Can development of specific parts of the brain be linked to specific parts of the DNA? How does a neuron knows from the DNA to which neurotransmitter be sensitive?
- How are connections between specific neurons established?
e.g. how an axon does know where to establish deliver a potential? How can the end of an axon move to the correct place?