We can observe a phenotype whether or not we understand the genetics behind it. In real life, there is a gene called HERC2 that works like I described, and most people with blue eyes have the broken allele of this gene.
Nerves, Neuroglia, and Ganglia. A nerve is a bundle of fibres (axons and/or dendrites) outside the CNS. Neuroglia are cells of the nervous system that help protect and support it. Ganglia are groups of nerve cell bodies lying outside the CNS.
Neuropathy--also called peripheral neuropathy--refers to any condition that affects the normal activity of the nerves of the peripheral nervous system. The peripheral nervous system is the network of nerves that connects the central nervous system--the brain and spinal cord--to the rest of the body.europathy--also called peripheral neuropathy--refers to any condition that affects the normal activity of the nerves of the peripheral nervous system. The peripheral nervous system is the network of nerves that connects the central nervous system--the brain and spinal cord--to the rest of the body.