Jacobs syndrome is a rare chromosomal disorder that affects only males. It is a condition where there is the presence of an extra Y chromosome in all of a male's cells. Males normally have only one X and one Y chromosome, however, individuals with Jacob's syndrome have at least one X and at least two Y chromosomes (XYY). It gives males a total of 47 chromosomes, instead of the average of 46.
Other names for Jacobs syndrome:
*This condition is usually asymptomatic which means that it shows no evidence of disease.*