Do you have these Traits? Attached Earlobes Tongue Rolling Dimples Right-Handed Freckles Straight Hair Cleft Chin Allergies Hitchhikers Thumb Widow’s Peak

Inventory of Traits Lab Problem Are dominant traits or recessive traits more common? Hypothesis If people are surveyed about their traits, then we will learn… Dominant traits are more common More people have traits that are recessive Etc.

Method Take Survey. Graph the class results of the survey. Survey 10 people outside class. Graph Results

Data Trait Answer Attached Earlobes Tongue Rolling Dimples Class Yes Class No Attached Earlobes Tongue Rolling Dimples Right-Handed Freckles Straight Hair Cleft Chin Allergies Hitchhikers Thumb Widow’s peak

Number of Students in Class with Trait Class Graph Number of Students in Class with Trait Dimples Attached Earlobes Hitchhiker’s Thumb Tongue Rolling Right Handed Freckles Straight Hair Cleft Chin Allergies Widow’s Peak

Dominant or Recessive Trait (Phenotype) Dominant or Recessive Possible Genotype Attached Earlobes Tongue Rolling Dimples Right-Handed Freckles Straight Hair Cleft Chin Allergies Hitchhikers Thumb Widow’s peak Recessive Dominant Dominant Dominant Dominant Recessive Dominant Not determined Recessive Dominant

Conclusion Which dominant traits are more common? Which recessive traits are more common? Are dominant traits or recessive traits more common (in general)? Hypothesis