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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