A trait is inherited from from genes that are found on DNA.
Unattached earlobes is considered a dominant gene Attached earlobe is considered recessive
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
Cleft chin present dominant No cleft chin recessive Dimples present dominant Lack of dimples recessive
Left handed is recessive Right handed is dominant
Straight hair is recessive Curly hair is dominant
Widows peak is dominantStraight line is recessive
Cross left thumb over right 55% of the people do this Cross right thumb over left 45% of people do this
Freckles present dominant Absence of freckles recessive
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!