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Tongue rolling is a dominant trait. Explain why it is possible for both parents being able to roll their tongue but their biological child is not able to do so.

Answer :

Hailey616
The parents are heterozygous so when they have a kid they got the ressesive trait so they can’t roll there tongue
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Answer:

The answer is 0 ( AKA A )

Explanation:

Parents form the same type of gene, which is Rr. Since all the genes are the same, there can not be a chance that the offspring can not roll the tongue. Next time focus on your work!! :3

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