The Sun Sneeze Gene

I have the photic sneeze reflex so I sneeze when I look at bright light. Check out 23andMe: *So technically the single nucleotide swap (C instead of T) is not actually in a gene per se but in an intergenic region on chromosome 2. It’s also not clear exactly how this affects physiology or causes the sun sneeze but there is correlative evidence that every copy of this single nucleotide polymorphism (SNP) is associated with a increase in likelihood of having the photic sneeze reflex