The Punnett square below shows a cross between a tabby cat and a tan cat. Use the Punnett square to answer the
questions.
1. What is the pattern of inheritance shown in this example? _____________________________
2. What are the genotypes and phenotypes of the parents?
3. List the possible genotypes and phenotypes of the offspring.
4.
5.
6.
7.
What percentage of the offspring will have tabby fur? ___________%
What percentage of the offspring will have tan fur? _____________%
What percentage of the offspring will have black fur? ___________%
Suppose two cats with tan fur have kittens. What are the possible genotypes and phenotypes of their offspring?
There are three possible genotypes and phenotypes for wing color in a species of moth. RR = red wings. RY =orange
wings. YY=yellow wings. Use the Punnett square below to answer the following questions.
1. What is the pattern of inheritance shown in this example? ___________________
2. What are the genotypes and phenotypes of the parents?
3.
4.
5.
6.
What percentage of the offspring will have red wings? ____________%
What percentage of the offspring will have orange wings? _________%
What percentage of the offspring will have yellow wings? _________%
Moths lay a lot of eggs! Suppose the parents produce 1200 offspring. Predict how many of those will have
orange wings.
7. Suppose out of the 1200 offspring, 950 have orange wings. Is that possible? Why or why not?
8. Suppose two moths with orange wings produce offspring. Make a Punnett square of the cross. List all the
possible genotypes and phenotypes of the offspring,
In a fictional species of mice, one gene determines fur color. B=black fur and W=white fur. Use the Punnett square to
answer the following questions
1. What is the genotype of the offspring? __________________________
2. Suppose the alleles in the example show incomplete dominance. What would be the phenotype of the
offspring? Explain your answer.
3. Suppose the alleles in the example show co dominance. What would be the phenotype of the offspring? Explain
your answer.