Genetics Home Reference Genetics Home Reference Genetics Home Reference: 47,XYY syndrome http://ghr.nlm.nih.gov/condition/47xyy-syndrome#diagnosis Genetics Home Reference: 47,XYY syndrome Genetics Home Reference: 47,XYY syndrome http://ghr.nlm.nih.gov/condition/47xyy-syndrome http://ghr.nlm.nih.gov/condition/47xyy-syndrome http://ghr.nlm.nih.gov/condition/47xyy-syndrome XYY « 47,XYY syndrome » XYY syndrome National Institutes of Health http://ghr.nlm.nih.gov/condition/47xyy-syndrome http://ghr.nlm.nih.gov/condition/47xyy-syndrome http://ghr.nlm.nih.gov/condition/47xyy-syndrome http://ghr.nlm.nih.gov/condition/47xyy-syndrome#diagnosis XYY syndrome Genetics Home Reference http://ghr.nlm.nih.gov/condition/47xyy-syndrome « 47,XYY syndrome » Genetics Home Reference: 47,XYY syndrome