1. Practicing Punnett Squares
Name__________________Date__________________Block________________
Answer the following questions.
1. What would be the Punnett square for two guinea pigs with the mother being brown
haired and the father being black haired? Assume that the black allele is dominant
and the father is heterozygous.
2. What is the phenotypic ratio for two pigs mated with one pig having a curly tail and
one pig having a straight tail? Assume curly is dominant and both parents are
homozygous?
3. For a cat with the genotype of BB, what could be the possible genotypes of the two
parents?

2. 4. Draw a Punnett square that shows intermediate inheritance.
5. Draw a Punnett square that shows codominance.
6. What does polygenic mean?
7. Compare and contrast heterozygous and homozygous.
8. For a flower showing an intermediate trait what would be the phenotype of a flower
whose genotype is written as FRFW? (Sometimes written just RW).

3. 9. In the human blood type, which types are considered dominant and which are
recessive?
10. Show a Punnett square for two people with the mother being blood type O and the
father being blood type A. Assume the father is heterozygous.
12. Draw your own Punnett square. Make sure to include a key telling me what trait is
dominant and what is recessive.