TOPICS: Gene expression, allele, DNA methylation, transcription, Prader-Wili syndrome, 15q11-q13 region, PWS gene, deletion, mutation, chromosome 15, spermatid, secondary oocyte, zygote, Angelman syndrome, UBE3A gene, seizures, intellectual disability, ataxia, obesity, hyperphagia, uniparental disomy, meiosis I nondisjunction, heterodisomy, meiosis II nondisjunction, meiosis, isodisomy, gametes, haploid, diploid, fertilization, loss of parental chromosome, uniparental disomy
