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"47,xyy" syndrome
- 47,XYY syndrome is characterized by an extra copy of the Y chromosome in each of an individual's ... causes no unusual physical features. Most individuals with 47,XYY syndrome have normal production of the male sex hormone ...
- ... children. More About This Health Condition Individuals with 47,XYY syndrome have one X chromosome and two Y chromosomes ... those individuals with this condition.Some people with 47,XYY syndrome have an extra Y chromosome in only some ...