Judged: two independent readers; copy check clear.
XYY syndrome
XYY syndrome XYY syndrome is a genetic condition in a male with an extra Y chromosome, producing a 47,XYY chromosome pattern.
XYY syndrome is a genetic condition in a male with an extra Y chromosome, producing a 47,XYY chromosome pattern. It is often linked with tall stature, a higher chance of learning disabilities, and delays in speech and language development.