1. CHARACTERISTIC
(trait)

2. Characteristics

3. Compare your smiley face with two other students in the class!
WRITE the trait that each smiley face has for each of the twelve characteristics.
CHARACTERISTIC
characteristics were the results of incomplete dominance (codominance)?
(How many faces did you compare? What are the possible percentage when you compare this many items )?
(How many faces did you compare? What are the possible percentage when you compare this many items )?

5. Wrapping It Up as a Class
NAME: DATE: PERIOD:
Genetics with a Smile
Wrapping It Up as a Class
Compare your Smiley Face phenotypes with the rest of your class
After we tally the number of smiley faces that have each trait, write the totals
calculate the dominant : recessive trait ratio (or first : second : third trait ratio for nose color and ear color).
Characteristic
dominant trait
# faces
recessive trait
trait ratio
(dominant : recessive)
Face shape
Eye shape
Hair style
Smile
Ear style
Nose style
Face color
Eye color
Hair length
Freckles
trait 1
#faces
trait 2
trait 3
trait ratio
(trait1:trait2:trait3)
Nose color
Ear color 5

6. Wrapping It Up as a Class
NAME: DATE: PERIOD:
Genetics with a Smile
Wrapping It Up as a Class
Make a punnett square for the characteristic face shape, using the male and female parents’ genotypes from Genetics with a Smile.
Fill in the possible genotypes for the offspring
What is the expected trait ratio (dominant:recessive)?
What is the expected trait ratio for the other completely dominant characteristics
Discuss how our class’s trait ratios compare to our expected ratio!
Make a punnett square for the characteristic nose color, using the male and female parents’ genotypes from Genetics with a Smile.
What is the expected trait ratio (trait 1:trait 2:trait 3)?
What is the expected trait ratio for ear color? 6