XYY syndrome
XYY syndrome (sometimes referred to as 'super-males') is a condition where males possess an extra Y chromosome, producing the 47, XYY karyotype.
It is usually asymptomatic. Affected individuals tend to be taller than average. Testosterone levels are normal and fertility and sexual development are usually unaffected.
There is an increased risk of learning difficulties. Aggression is not seen in higher levels than the normal population.
It is usually asymptomatic. Affected individuals tend to be taller than average. Testosterone levels are normal and fertility and sexual development are usually unaffected.
There is an increased risk of learning difficulties. Aggression is not seen in higher levels than the normal population.
