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Characterized by significant hypotonia in infancy, which evolves to a pattern of overeating and obesity by six months to a year, with variable mental retardation, characteristic facies, small hands and feet, and hypogonadism; this defect is a result of abnormalities on:
a) maternal chromosome 15q11-15q13
b) paternal chromosome 15q11-15q13
c) maternal chromosome 7p11-7p13
d) paternal chromosome 7p11-7p13
e) maternal chromosome 17q13-17q15

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