Genetics With A Smile
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1
2Genetics with a Smile
Name _________________________________
Part A: Smiley Face Traits
(1) Obtain two chips from your teacher. The white chip represents the female parent and
the red chip represents the male parent. The parents are heterozygous for all the
Smiley Face traits.
(2) Flip the chips for each parent for each trait. If the chip lands with the letter ‘d’ up, it
represents a dominant allele. A chip that lands with the letter ‘r’ up indicates a
recessive allele. Record the result for each person by circling the correct letter on the
chart. Use the results and the Smiley Face Traits page to determine the genotype and
phenotype for each trait.
Trait
Female (White
Male (Red
Genotype
Phenotype
Chip)
Chip)
Face Shape
C
c
C
c
Eye Shape
E
e
E
e
Hair Style
S
s
S
s
Smile
T
t
T
t
Ear Style
V
v
V
v
Nose Style
D
d
D
d
Face Color
Y
y
Y
y
Eye Color
B
b
B
b
Hair Length
L
l
L
l
Freckles
F
f
F
f
Ear Color
P
T
P
T
Nose Color
R
Y
R
Y
Part B: Is it a boy or girl?
To determine the sex of your smiley face, flip the chip for the male parent ONLY. “D”
would represent X, while “r” would be Y.
Female
Male
Genotype
Phenotype
Sex
X
X
Y
Part C: Create Your Smiley Face!
Use the Smiley Face Traits chart and your results from Part A to create a picture of your
smiley face. Use the computer paper that’s provided.
Don’t forget to give your smiley face a name!
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