Given that the ability to roll a tongue is a dominant trait, if a **heterozygous tongue-roller** marries a **non-tongue roller**, what is the probability that their child is a ** non-tongue roller**?

Punnett squares are used to estimate the probability of inheriting a certain gene by crossing the alleles from both parents. A capitalized letter is used to show a dominant trait while a non-capitalized letter shows a recessive trait. Here's an example:

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