Brainy sons owe intelligence to their mothers
Friday 28 June 1996
Intelligent men owe their brains to their mothers, according to research published today in The Lancet.
Growing evidence shows that several genes which determine intelligence appear to be located on the X chromosome, the one men inherit from their mothers .Any mutation on the X chromosome has more effect on a man than a woman because a woman inherits X chromosomes from both her parents, which tends to dilute the gene's impact.
But a man only has one X chromosome inherited from his mother, which is paired with the much smaller Y chromosomes from his father. Therefore, an intelligence-enhancing X gene has more of a chance of becoming the predominate gene, determining the man's basic intelligence, looks and character. It also works the other way; if the predominate gene is not as strong as it should be, the man is more likely to suffer mental retardation.
Professor Gillian Turner, the author of the study, said: "If the gene is the one that increases intelligence then its full effect will be seen in men, while in women the benefit is less pronounced. This explains why some men are extraordinarily intelligent." She concludes that if a man wants smart sons his best bet is to marry a smart woman.
- 4 Women think Irish men are the sexiest, survey finds
- 5 Florida couple forced to register as sex offenders for having sex on public beach
Italian police 'reveal' what Jesus looked like as a young boy
Who should I vote for in the general election? Take The Independent's interactive quiz to find out which party is the right choice for you
Florida couple forced to register as sex offenders for having sex on public beach
Mysterious 'X-Files' sounds heard miles above the Earth
Met Gala 2015: Jason Derulo falling over in epic fashion, the event's most talked about moment, wasn't what it seemed
In defence of liberal democracy
General Election 2015: Post-election 'shambles' looms as 70 per cent of voters say SNP 'should not be able to veto UK government policies'
The Rothschild Libel: Why has it taken 200 years for an anti-Semitic slur that emerged from the Battle of Waterloo to be dismissed?
General Election 2015: UK will be 'run for the wealthy and powerful' if Tories retain power, Labour warns
General election live: SNP suspends two members for disrupting Labour rally
Schools forced to act as 'miniature welfare states' with teachers buying underwear and even haircuts for poor pupils
£35000 - £40000 per annum + car and benefits: Ashdown Group: Marketing Manager...
£18000 - £20000 per annum: Ashdown Group: Helpdesk Analyst - Devon - £20,000 ...
£35000 - £50000 per annum + generous bonus: Ashdown Group: Business Analytics ...
£45000 - £50000 per annum: Ashdown Group: IT Project Coordinator (Software Dev...