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4. The Genetics of Photic Sneeze Reflex

The other name for this illness is ACHOO, an acronym that describes the genetic origins of the condition. ACHOO stands for Autosomal Dominant Compelling Helio-ophthalmic Outburst. "Autosomal" comes from the fact that the affiliated gene is located on a non-sex linked chromosome, meaning both men and women can have this condition. "Dominant" describes the fact that the gene only needs to be passed on from one parent to express in the offspring. Genetically speaking, this trait is even more common than green eyes.

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