For 10 points, name this effect that can follow a bottleneck event, in which a population arises from a limited number of original members.
Labuda et al. attributed the prevalence of rickets among Quebecois to this effect.  Wallace et al. found that it could be found among Amerindian populations by examining the mitochondrial DNA.  Prevalence of fumarase deficiency in Fundamentalist Latter-Day Saint populations is one clear modern example of it among human populations as are numerous examples among various Pacific islands.  First described by Ernst Mayr in 1952, it can result in increased genetic drift.  For 10 points, name this effect that can follow a bottleneck event, in which a population arises from a limited number of original members.
Labuda et al. attributed the prevalence of rickets among Quebecois to this effect.  
{founder effect}