Why can some people roll their tongues but others can’t?

Although we’re often taught in school that
tongue rolling is due to genes, the truth is
likely to be more complex. There is likely
to be an overlap of genetic factors and
environmental infl uence. Studies on
families and twins have shown that it
cannot be a case of simple genetic
inheritance. Ask around – the fact that
some people can learn to do it suggests
that in at least some people it’s
environmental (ie a learned behaviour)
rather than genetic (inborn)

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