1. Punnett Square Test Review
Created by sfalwell. Permission for teachers to use with link to

2. Part 1: Vocabulary

3. 1. The form of the gene that is “weaker” and can be hidden
by another allele
Dominant
Recessive
Genotype
Phenotype

4. 2. The form of the gene that is “stronger” and
appears more often
Dominant
Recessive
Genotype
Phenotype

5. 3. BB, Bb, and bb are examples
Dominant
Recessive
Genotype
Phenotype

6. Dominant Recessive Genotype Phenotype
4. Being tall or short are examples
Dominant
Recessive
Genotype
Phenotype

7. The genes or instructions
for a trait
Dominant
Recessive
Genotype
Phenotype

8. 6. Is represented by letters
Dominant
Recessive
Genotype
Phenotype

9. 7. The expression of a gene
Dominant
Recessive
Genotype
Phenotype

10. 8. Could look like the recessive trait
Homozygous
Heterozygous

11. 9. Would always look like the dominant trait
Homozygous
Heterozygous

12. 10. bb is an example
Homozygous
Heterozygous

13. 11. Bb is an example
Homozygous
Heterozygous

14. 12. BB is an example
Homozygous
Heterozygous

15. 13. BB would result in a _______ phenotype
Dominant
Recessive

16. 14. Bb would result in a _______ phenotype
Dominant
Recessive

17. 15. bb would result in a _______ phenotype
Dominant
Recessive

18. 16. BB would result in a _______ genotype
Homozygous
Heterozygous

19. 17. Bb would result in a _______ genotype
Homozygous
Heterozygous

20. 18. bb would result in a _______ genotype
Homozygous
Heterozygous

21. Part 2: Fill In

22. 19. Which is the correct way of filling in the punnett square?

23. 20. Which is the correct way of filling in the punnett square?

24. 21. Which is the correct way of filling in the punnett square?

25. Part 3: Set Up

26. How would you set up a punnett square for these parents?
B = Black fur b= white fur
Draw a punnett square for a
Mom who is heterozygous and a
Dad who is homozygous recessive.

27. How would you set up a punnett square for these parents?
B = Black fur b= white fur
Draw a punnett square for a
Mom who is homozygous dominant and a Dad who is homozygous recessive.

28. How would you set up a punnett square for these parents?
B = Black fur b= white fur
24. Draw a punnett square for a
Mom who is homozygous recessive and a Dad who is homozygous for black fur.

29. How would you set up a punnett square for these parents?
B = Black fur b= white fur
25. Draw a punnett square for a
Mom who is heterozygous and a Dad who has white fur.

30. Part 4: Reading a Punnett Square

31. B = Black fur b= white fur
26. What is the probability of a child with black fur?

32. B = Black fur b= white fur
27. What is the probability of a child with white fur?

33. B = Black fur b= white fur
28. What is the probability of a child with a homozygous genotype?

34. B = Black fur b= white fur
29. What is the probability of a child with a heterozgous genotype?

35. B = Black fur b= white fur
30. What is the probability of a child with a dominant phenotype?

36. B = Black fur b= white fur
31. What is the probability of a child with a recessive phenotype?

37. Part 5: Punnett Square Word Problems

38. B = Black fur b= white fur
32. If mom is homozygous dominant and dad is homozygous recessive, what is the probability of their child having black fur?

39. B = Black fur b= white fur
33. If mom is homozygous dominant and dad heterozygous, what is the probability of their child having white fur?

40. B = Black fur b= white fur
34. If mom and dad are both heterozygous, what is the probability of their child having white fur?

41. B = Black fur b= white fur
35. If mom is heterozygous and dad is homozygous recessive, what is the probability of their child having white fur?