Crazy Snowman Genetics
It is your job to make sure that you design your own snowperson for this activity; however, you are never
allowed to choose what the snowperson looks like, just like a parent can’t choose what his or her child will
look like. We will leave it up to chance by flipping a coin. Each time you flip the coin, it is symbolizing
random parts of the DNA being activated.
First you need to figure out the gender of your snow person! Heads is female, Tails is Male.
Our snow persons sex _________________ Our snow persons name______________________
Dominant allele is heads and recessive is tails for all of the questions below. Write your genotype and
phenotype in the lines provided before you draw your snowperson.
Part I
# of
Flips
2
2
2
2
2
2
2
2
2
2
2
2
Dominant
Trait
made up of 3 snowballs (H)
Big carrot nose (N)
Coal for mouth, belly, and eyes
(E)
Scarf (S)
Fat (F)
Sticks for arms
(A)
white snow (C)
No boots (B)
No top (T)
pants
Buck teeth
Got into a fight (draw band
aids, bruises, cuts, etc…)
Recessive
Trait
Made up of 2 snowballs
banana nose
Buttons for mouth, belly
and eyes
Bling bling necklace
Incredibly fat
Spotted cow arms
yellow snow
boots
Sweater vest
Grass skirt
Braces
No cuts or bruises
the mouth)
The genotype
The phenotype
(ex HH, Hh, hh) (Physical trait)
Incomplete dominance is when both alleles are dominant. When both dominant alleles are expressed
each gene is incompletely expressed resulting in a blend of the two trait.
Part II Flip your coin twice to determine the outcome of each trait below. Write your genotype and
phenotype in the lines provided before you draw your snowperson.
# of
Flips
2
2
Dominant #1
(2 heads)
Smooth snow
(SS)
Holding a
broom(BB)
Inc. Dominant trait
(1 heads and 1 tails)
Dominant #2
(2 tails)
Lumpy head (SL)
Lumpy all over (LL)
Holding a trident (SB)
A monocle
No glasses (NN) (NG)
Bear ears
Human ears (HH) (HM)
2
2
Genotype
Phenotype
Holding a spear(SS)
BIG 1970’s glasses
(GG)
Mickey mouse ears
(MM)
Co- dominance is when both alleles are also dominant. In this case when both dominant alleles are expressed
each gene is expressed equally. Co = together
Part III
Flip your coin twice to determine the outcome of each trait below. Write your genotype and phenotype in
the lines provided before you draw your snowperson.
# of
Flips
Dominant #1
(2 heads)
2
Blue flowers in
hand (BB)
2
2
Black Hat (HH)
Talking on cell
phone (CC)
Inc. Dominant trait
(1 heads and 1 tails)
Blue and pink
striped
flowers (BP)
Black and
yellow polka
dotted hat
(HY)
Voice texting (CT)
Dominant #2
(2 tails)
Genotype
Phenotype
Pink flowers in hand
(PP)
Yellow hat (LL)
Texting on cell phone
(TT)
Now find a group that has the opposite gender snow person in the class and mate them!!! Yes you are making a
snowbaby!! How cute  Use the next page to complete the Punnett squares for each trait. When all your Punnett
squares are complete come see your teacher for how to complete the final step of determining your babies traits.
Once you have determined all your babies traits, work with your partner and snow mates group to draw a family
portrait.
Snowball numbers
Fatness
Top clothing
Nose Type
Arm type
Bottom clothing
Mouth, Belly and Eyes
Scarf or necklace
Snow color
footwear
Teeth type
Fight marks
Snow consistency
Flowers
Holding
Hat
Glasses
Phone
Ears