Little Monsters
Aim: To produce baby monsters following Mendelian Inheritance
Materials
A coin for each student
Access to the Little Monster Traits Table
Method: Making the parent monster
1.
Work through the traits one at a time
2.
Flip a coin twice
3.
A coin that lands heads up codes for the dominant trait e.g. M
4.
A coin that lands tails up codes for the recessive trait e.g. m
5. Write down the genotype of the parent monster after flipping the coin twice
e.g. Mm
6.
Write down the phenotype of the monster e.g. sad mouth
Example: The gene for hair can be either straight or curly. Curly is dominant (H). Both coins are flipped. The
M coin has tails and so codes for h. The F coin has heads and codes for H. Write down Hh for the genotype
for hair. The phenotype is Curly hair.
Trait
Hair
Mouth
Teeth
Ears
Nose
Eyes
Eyebrows
Chin
Genotype
Phenotype
Draw your parent monster
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The next generation of Little Monsters
Your parent monster grows up and meets another parent monster. They have two
children. It is your job to determine what their children look like. Working with
another student, determine the genotype and phenotype of the children
1. If your parent monster is homozygous for a trait then it contributes the
allele that it has to the offspring.
2. If your parent monster is heterozygous for a trait then you need to flip a
coin to determine which allele the offspring is going to have.
3. Your partner and you contribute ONE allele for each trait.
4. Draw your monster offspring
Child 1
Trait
Hair
Mouth
Teeth
Ears
Nose
Eyes
eyebrows
Chin
Genotype
Phenotype
Child 2
Trait
Hair
Mouth
Teeth
Ears
Nose
Eyes
eyebrows
Chin
Genotype
Portraits of the children
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Phenotype
Trait
Hair
Mouth
Teeth
Ears
Nose
Eyes
Eyebrows
Chin
Dominant
Curly (H)
Upside down smile (M)
One tooth (T)
Small and pointy (E)
Large and pointy (N)
Diamond shaped (Y)
Thick and curly (B)
Square (S)
Recessive
Straight (h)
Big smile (m)
Lots of teeth (t)
Round ears (e)
Small button nose (n)
Circular (y)
Thin, long and droopy (b)
Pointy (s)
Trait
Hair
Mouth
Teeth
Ears
Nose
Eyes
Eyebrows
Chin
Dominant
Curly (H)
Upside down smile (M)
One tooth (T)
Small and pointy (E)
Large and pointy (N)
Diamond shaped (Y)
Thick and curly (B)
Square (S)
Recessive
Straight (h)
Big smile (m)
Lots of teeth (t)
Round ears (e)
Small button nose (n)
Circular (y)
Thin, long and droopy (b)
Pointy (s)
Trait
Hair
Mouth
Teeth
Ears
Nose
Eyes
Eyebrows
Chin
Dominant
Curly (H)
Upside down smile (M)
One tooth (T)
Small and pointy (E)
Large and pointy (N)
Diamond shaped (Y)
Thick and curly (B)
Square (S)
Recessive
Straight (h)
Big smile (m)
Lots of teeth (t)
Round ears (e)
Small button nose (n)
Circular (y)
Thin, long and droopy (b)
Pointy (s)
Trait
Hair
Mouth
Teeth
Ears
Nose
Eyes
Eyebrows
Chin
Dominant
Curly (H)
Upside down smile (M)
One tooth (T)
Small and pointy (E)
Large and pointy (N)
Diamond shaped (Y)
Thick and curly (B)
Square (S)
Recessive
Straight (h)
Big smile (m)
Lots of teeth (t)
Round ears (e)
Small button nose (n)
Circular (y)
Thin, long and droopy (b)
Pointy (s)
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