Genotype Practice Worksheet



Phenotype Practice Worksheet

Directions: Use the information given to you below about each trait to answer the problems that follow.

Trait Dominant Form Recessive Form Letter to Use

Hair Color Dark Red D or d

Eye Color Hazel Gray H or h

Cleft Chin Cleft Chin Non-cleft C or c

Widow’s Peak Widow’s Peak Not Present W or w

Freckles Freckles No Freckles F or f

Tongue Rolling Can Can’t T or t

1. What is the phenotype of a female who is heterozygous for eye color? _______________________

2. What is the phenotype of a female who is homozygous dominant for cleft chin? _________________

3. What is the phenotype of a male who is homozygous recessive for hair color? ___________________

4. What is the phenotype of a male who is heterozygous for the widow’s peak? _________________

5. What is the phenotype of a female who is homozygous recessive for eye color? __________________

6. What is the phenotype of a male who is heterozygous for cleft chin? ________________________

7. What is the phenotype of a female who is homozygous dominant for tongue rolling? __________________

8. What is the phenotype of a male who is homozygous recessive for freckles? ____________________

9. What is the phenotype of a male who is heterozygous for tongue rolling? _____________________

10. What is the phenotype of a female who is homozygous dominant for hair color? __________________

11. If a person has the genotype DD, what trait would they show? _____________________________

12. If a person has the genotype tt, what trait would they show? _______________________________

13. If a person has the genotype Ww, what trait would they show? _____________________________

14. If a person has the genotype Ff, what trait would they show? ______________________________

15. If a person has the genotype CC, what trait would they show? _____________________________

16. If a person has gray eyes, what genotype do they have? __________________________________

17. If a person has brown hair, what genotypes might they have? ______________________________

18. If a person does not have a widow’s peak, what genotypes might they have? __________________

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