Tongue Rolling

Biology Level 1

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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