Height differences 'could be caused by DNA changes'

Subtle changes in our genetic make-up could help to explain why some people are taller than others, the largest ever study of height has suggested.

About 400 genome regions have been identified that may be responsible for the extra inches, according to research involving more than 250,000 people.

Scientists say this could pave the way for a simple test to reassure parents with fears about their child's growth.

It may also shed more light on cancer, where cell growth is out of control.

Studies suggest up to 80% of what determines height lies in our genetic code.

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