Translations:Adventist Youth Honors Answer Book/Health and Science/Heredity/21/en
From Pathfinder Wiki
- Rolling tongue
- It was once taught with certainty that the ability to roll one's tongue into the shape of a tube was a dominant trait, however; based on the research data kept by Genome Research, this may not be the case. In 1952 Matlock and again in 1975 Martin realized that identical twins are no more likely to be able to roll their tongues than are fraternal twins. From the evidence, it appears that the ability to roll one's tongue may not be a genetic trait after all.
