Language Evolution: A Gene for Language?

How come humans learn to speak and use language in extraordinarily sophisticated ways, without any conscious effort, while other animals do not? Recent research suggests that the answer lies, in part, in our genes. And three generations of a British family held the key to discovering which gene. Neuroscientist Dr Frederique Liegeois joins Michael Rosen and Dr Laura Wright to discuss the genetic basis of language. Producer...Mary Ward-Lowery.