Download Genotype Practice Worksheet

Genetics:
Phenotype
Name: _______________________________
Date: ________________
Phenotype Practice Worksheet
Directions: Use the information given to you below about each trait to answer the problems that follow.
Trait
Hair Color
Eye Color
Cleft Chin
Widow’s Peak
Freckles
Tongue Rolling
Dominant Form
Dark
Hazel
Cleft Chin
Widow’s Peak
Freckles
Can
Recessive Form
Red
Gray
Non-cleft
Not Present
No Freckles
Can’t
Letter to Use
D or d
H or h
C or c
W or w
F or f
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? __________________