Human DNA is made up of 23 pairs of chromosomes: one set from the mother and one set from the father. But sometimes a genetic glitch causes a child to inherit both chromosomes from one parent, an occurrence called uniparental disomy. Angelman and Prader-Wklli symdromes are examples of this malfunction on chromosome number 15. 엔젤만 증후군은 아이의 15번 염색체 ..