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Name: Xio
Status: Other
Grade:  9-12
Location: N/A
Country: United States
Date: June 2005

My daughter can curl her tongue but my husband and I cannot. She doubted herself as an adopted child because she searched everywhere saying tongue curling is inherited. Why?

In view of the fact that identical twins aren't always both tongue rollers, tongue rolling is not a simple Mendelian trait. Do a search on Google under "tongue rolling genetics" and you will see many articles showing that tongue rolling is not a good example of Mendelian inheritance.

Ron Baker, Ph.D.

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