Dominant



Human Traits and Genes

For each trait listed bellow fill in the genetic traits that are descriptive of you.

|Traits: Circle Your Phenotype |

|Ear Lobes Free or Attached |

|Hairline Straight or Widow’s Peak |

|Tongue Roll Tongue or Cannot Roll Tongue |

|Hand clasping Right over Left or Left over Right |

|Arm Folding Right on Top or Left on Top |

|Finger mid-joint hair Present or Absent |

|Thumb Hitchhiker’s Thumb or Straight Thumb |

|Hair Color Black/Brown or Red/Blonde |

|Hair Texture Curly or Straight |

|Eye color Blue/Green or Brown |

|Handedness Left Handed or Right Handed |

|Chin cleft Present or Absent |

|Dimples Present or Absent |

|Freckles Present or Absent |

Class Data: Now survey the class to see what traits are more prevalent:

|Trait |Form 1 |# |Form 2 |# |

|Ear Lobes |Free | |Attached | |

|Hairline |Straight | |Widow’s Peak | |

|Tongue |Roller | |Non-Roller | |

|Hand clasping |R. over L. | |L. over R. | |

|Arm Folding |R. on Top | |L. on Top | |

|Finger mid-joint hair |Present | |Absent | |

|Thumb |Hitchhiker’s | |Straight | |

|Hair Color |Brown | |Blonde | |

|Curly or Straight |Curly | |Straight | |

|Eye color |Blue/Green | |Brown | |

|Left Handed or Right Handed |Left | |Right | |

|Chin cleft |Present | |No cleft | |

|Dimples or no Dimples |Dimples | |None | |

|Freckles or No Freckles |Freckles | |No Freckles | |

Questions:

1. Based on your results, which traits do you think are dominant and which are recessive?

(Place a DOT next to the characteristic above that you feel is DOMINANT)

2. Were there any dominant traits that turned up low numbers? What were they?

3. Did any actual recessive traits turn up to be more common in your class? How might this have happened?

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