Betsy Grunch, MD | Neurosurgeon on Instagram: "Most do not know exactly how it feels to walk through life as a red head. Red hair often comes from MC1R gene variants on chromosome 16, which increase pheomelanin (red pigment) and reduce eumelanin (dark pigment)- leading to red hair, lighter skin, and freckles. Blue eyes trace back to changes in the OCA2 and HERC2 genes on chromosome 15, which limit melanin in the iris, giving that striking blue shade. Both traits are recessive, meaning they can h