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NAME __________________________ PERIOD ________
GENETICS PRACTICE QUIZ
PART I: MATCHING
_____ 1. Gregor Mendel
_____ 4. Recessive
A. One dominant and one recessive allele are
present
B. Shows all possible genetic combinations
between two parents
C. The allele that does not show in a heterozygous
individual
D. The physical appearance of an individual
_____ 5. Homozygous
E. The father of genetics
_____ 6. Heterozygous
_____ 7. Punnett Square
F. The allele that does show in a heterozygous
individual
G. Having two of the same alleles in a genotype
_____ 8. Genotype
H. The genetic make-up of an individual
_____ 2. Phenotype
_____ 3. Dominant
PART II: CROSSES
For the following two problems, be sure to show parental genotypes, complete the punnett
square, and give ratios indicated. Use the following letters for gerbil genes:
Hair Texture
N = Normal texture
n = curly
Hair Color
B = Brown
b = white
ONE FACTOR CROSS
9. Cross a heterozygous normal haired gerbil with a curly haired gerbil.
Parents: ______________ x _________________
Genotypic Ratio
Phenotypic Ratio
10. Cross two heterozygous brown-haired gerbils (use letters on front page)
Parental Genotypes:
_____________ x _________
Square:
Phenotypic Ratio:
SEX LINKED PROBLEM (REMEMBER X’S AND Y’S)
11. A color blind male marries a woman who is homozygous normal for vision. (N = normal vision; n =
color blindness)
1. What is the genotype of the male? ___________
2. What is the genotype of the female? __________
3. Show the cross between these two individuals:
4.
5. What are the chances that any of their children will
be color blind? ____________
6. Who did the father inherit his color blindness
from? _______________________
BLOOD TYPE PROBLEM (Remember to use A, B or O)
12. A woman with type A blood is expecting a child with a type B man. Both the woman and the man
had one parent who was type O.
What are the genotypes of the couple? ___________ x ______________
Cross:
What blood types can their baby be?
_____________________________
TWO-FACTOR CROSS PROBLEM
The next three questions refer to the following punnett square:
13. What would the genotype of offspring #4 be? _____________________
14. What would the phenotype of offspring #4 be? ____________________
15. Which three numbers would have the same phenotype as #7? ____, ____ and _____