]> 2026-07-31T09:41:31+00:00 WBR0123 0 en Deletion of a maternal-derived allele; methylation of a paternal-derived allele on chromosome 14 Deletion of paternal-derived allele; methylation of maternal-derived allele on chromosome 14 Deletion of maternal-derived allele; methylation of paternal-derived allele on chromosome 15 Deletion of paternal-derived allele; methylation of maternal-derived allele on chromosome 15 Methylation of two maternal-derived alleles on chromosome 15 Genetics A 15-year-old girl is brought for evaluation by a medical geneticist. As an infant, she displayed significant development delays in both cognitive and motor functioning. She was only able to walk alone at the age of 32 months. Her past medical history is also significant for tonic seizures. Today, her gait is wide-based and she has notable ataxia. She is severely mentally retarded, with a vocabulary of approximately 20 words. Despite these symptoms she has a pleasant demeanor and laughs often without humorous stimulus. Which of the following genetic disorders is most likely responsible for the patient's condition? C Neurology General Principles 2020-10-27T23:25:51Z 2459150.4762847 WBR0123