People who have one of several well-documented medical conditions do not have only XX or XY chromosomes, which typically correspond with female and male sexes, respectively. Those conditions include ...

XYY syndrome affects 1 in 1,000 males and is caused by the presence of an extra Y chromosome. XYY syndrome symptoms vary but males with the disorder could be taller than average, have speech ...

Prenatal checks revealed that the unborn child has XYY syndrome, a genetic condition which has been wrongly linked to criminal behaviour. On July 14, six-month pregnant Jiujiu from Sichuan ...

For example, 47,XYY syndrome, also known as Jacobs ... For example, those with complete androgen insensitivity syndrome possess XY chromosomes, but because their bodies don’t respond to ...