Genetics: Name: ______
Phenotype Date: ______
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? ______