Question

which disorder is caused in man by the presence of one extra sex chromosomes

Answer 1

Its probably called Jacob's Syndrome. Try searching this on Google. I hope it will help you.

Thanks.

Answer 2

It can cause a change in the genetic constitution of a person that makes the prsn behave unusual..the genetic constitution might be either XXX or XXY..
It is also responsible for the change in the growth hormones of the person that makes the person appear and behave both like a man and a female..

Jacob's syndrome is responsible for genetic constitution as XYY Klinefelter syndromenis responsible for genetic constitution as XXY Hope it helps;)