XXY-syndrome

syndrome in males that is characterized by small testes and long legs and enlarged breasts and reduced sperm production and mental retardation; a genetic defect in which an extra X chromosome (XXY) is present in the male

小さな精巣、長い脚、女性化乳房、精子産生の減少、知的障害を特徴とする男性の症候群；男性に余分なX染色体（XXY）が存在する遺伝子異常