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Published byBrett Cannon Modified over 9 years ago
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A trait is inherited from from genes that are found on DNA.
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Unattached earlobes is considered a dominant gene Attached earlobe is considered recessive
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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
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Cleft chin present dominant No cleft chin recessive Dimples present dominant Lack of dimples recessive
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Left handed is recessive Right handed is dominant
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Straight hair is recessive Curly hair is dominant
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Widows peak is dominantStraight line is recessive
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Cross left thumb over right 55% of the people do this Cross right thumb over left 45% of people do this
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Freckles present dominant Absence of freckles recessive
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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/
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