'Our discovery complicates our entire view of how variation is transmitted across generations, but also opens up exciting new possibilities and avenues of research,' said lead author Dr Crean.We know that features that run in families are not just influenced by the genes that are passed down from parents to their children,' Dr Clean added.

Has your little one got an unexplained rash? Crying for no apparent reason? He may have an intolerance that hasn’t yet been diagnosed. But don’t panic – a food intolerance is never threatening, unlike an allergy can be, and there are lots of symptoms you can look out for so you know when it’s time to pay your GP a visit.