Authors: Unique – Rare Chromosome Disorder Support Group
Date of Publication: 2014
An article with general information about XYY Syndrome.
“Approximately one boy in 1000 has XYY chromosomes. In the cells of their body, instead of 46 chromosomes including one X and one Y chromosome, they have one X and two Y chromosomes, making 47 in all. The impact of the extra Y chromosome is extremely variable.”