2. A trait is inherited from from genes that are found on DNA.

3. Unattached earlobes is considered a dominant gene Attached earlobe is considered recessive

4. Famous geneticist Alfred Sturtevant noted about 70% of people of European ancestry are able to roll their tongues. 30% of twins do not share this trait. Ability to roll tongue is dominant gene. Recessive if you cannot roll tongue

5. Cleft chin present dominant No cleft chin recessive Dimples present dominant Lack of dimples recessive

6. Left handed is recessive Right handed is dominant

7. Straight hair is recessive Curly hair is dominant

8. Widows peak is dominantStraight line is recessive

9. Cross left thumb over right 55% of the people do this Cross right thumb over left 45% of people do this

10. Freckles present dominant Absence of freckles recessive

11. 75% people can taste PTC PTC like chemicals found in vegetables like cabbage, brussel sprouts, and broccoli PTC taster is dominant Let’s see if you can taste it! http://learn.genetics.utah.edu/content/inheritance/ptc/