1. POD 2/13 or 2/14 1. What is a trait? 2. What is a dominant trait? 3. What is a recessive trait?

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

3. 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. Inventory of My Traits Lab

4. Method 1.Take Survey. 2.Graph the class results of the survey. 3.Graph the percent of people in the general population with the trait.

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

6. Class Graph Attached Earlobes Tongue RollingDimplesRight HandedFrecklesStraight HairCleft ChinAllergiesHitchhiker’s Thumb Widow’s Peak Number of Students in Class with Trait

7. General Population Graph Tongue Rolling 70% Right Handed 93% Hitchhiker’s Thumb 25% Percent of People in General Population with Trait

8. 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 Recessive

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