Name ______
Monster Punnett Squares
Part I
1. For each genotype below, indicate whether it is a heterozygous (HE) or homozygous (HM)
RR ______Hh ______gg ______Tt ______rr ______
HH ______Gg ______tt ______Rr ______hh ______
In Monsters, the following traits are dominant and recessive.
Trait Dominant Recessive
# of eyes Two (T) one (t)
Skin color Green (G) blue (g)
Coat texture Rough (R) smooth (r)
Horns Has horns (H) no horns (h)
2. Write all possible genotypes next to the descriptions.
a. One eye ______d. Two eyes ______
b. Green skin ______e. blue skin ______
c. Has horns ______f. no horns ______
3. Determine the phenotype for each genotype using the information provided about the Monsters.
a. TT ______Tt ______tt ______
b. GG______gg______Gg ______
c. rr ______Rr ______RR______
d. HH ______Hh______hh______
Part II. For each of the following, a) draw a Punnett Square in the space provided, b) write the percent genotype, and c) write the percent phenotype.
4. Tt X TT
______% has two eyes
5. GG X gg
______% has green skin
6. Rr X Rr
______% has rough coat
7. hh X hh
______% has horns
8. Cross a heterozygous two-eyed monster with a one-eyed monster.
______% two eyes
______% one eye
9. Cross a homozygous green monster with a blue monster.
______% green
______% blue
10. Cross two heterozygous horned monsters.
______% horns
______% no horns