Tuesday, September 8, 1998 Published at 09:39 GMT 10:39 UK
Born to be rude
Do their genes make them rude?
Controversial new research suggests that there is a scientific reason why boys tend to be ruder and naughtier than girls.
Scientists meeting in Cardiff are to hear that boys' genes may make them less socially adept and more prone to conditions like autism.
They made the discovery when studying girls born with Turner's Syndrome.
They can come across as insensitive, a trait normally associated with boys.
While most women have two X chromosomes, Turner's sufferers have only one complete one.
It turns out that the social difficulties are linked to girls whose complete X chromosome was inherited from their mother - as it is in all normal boys.
Turner girls whose undamaged X chromosome came from their fathers did not have the same problems.
His conclusions, published in Nature magazine, were dismissed by rival researchers.
Professor Kruse intends to reveal new evidence to back his findings at the British Association's science festival in Cardiff.