Colour Blindness on Pingelap: An Extreme Example of the Founder Effect

Writing about the twins of Cândido Godói last month got me thinking about another extreme example of genetic bottlenecking and the resulting founder effect on future generations, namely the high percentage of persons suffering from complete colour blindness (complete achromatopsia) on the Micronesian atoll of Pingelap in Pohnpei state. Sufferers of ‘maskun’, as it is…

Continue Reading →