Gene PoolGene FrequencyPrader-Willi SyndromeFathersChromosomes, Human, YGenomic ImprintingAllelesGenetics, PopulationSelection, GeneticIndians, South AmericanGenetic VariationModels, GeneticPolymorphism, GeneticHeterozygoteGenotypeSwimming PoolsBlood Group AntigensPaternityGenes, RecessiveJewsHeterozygote DetectionConsanguinityEthnic GroupsHaplotypesPhenotypeElectrophoresis, Starch GelInbreedingBiological EvolutionHomozygoteGenetic MarkersPhosphoglucomutase