gene, which signals melanocytes to produce eumelanin instead of pheomelanin.
: Most individuals with dark hair possess two functional copies of the MC1Rcap M cap C 1 cap R dark hair
: Dark hair results from high levels of eumelanin produced by melanocytes in the hair follicle bulb. gene, which signals melanocytes to produce eumelanin instead
Evolutionary biologists suggest that dark hair and skin evolved as an adaptation to intense solar radiation, particularly in equatorial regions. Biochemistry, Melanin - StatPearls - NCBI Bookshelf - NIH particularly in equatorial regions. Biochemistry