Angelman SyndromePrader-Willi SyndromeChromosomes, Human, Pair 15snRNP Core ProteinsGenomic ImprintingSyndromeUbiquitin-Protein LigasesGene DeletionChromosome DeletionUniparental DisomySequence DeletionLaughterRibonucleoproteins, Small NuclearBeckwith-Wiedemann SyndromeIntellectual DisabilityMicrocephalyChromosome InversionIn Situ Hybridization, FluorescenceDNA MethylationChromosome MappingPhenotypePedigreeChromosome BreakageAbnormalities, MultipleAtaxiaMutationChromosome BandingGenetic CounselingAutoantigensBase SequenceGenetic MarkersMolecular Sequence DataMethyl-CpG-Binding Protein 2FathersDisease Models, Animal