Name: _______________________ Period: _____
Probability/Inheritance and Punnett Square Quiz
1. What is the definition of probability?
2. If you toss a coin twice, what is the probability that you will get heads the second time?
a) 25%
b) 50%
c) 75%
d) none of the above
3. What process creates gametes?
a) Fertilization
b) Mitosis
c) Meiosis
d) Karyotyping
4. To what aspect of genetics does probability apply?
a) Meiosis and genotyping
b) Mitosis and genotyping
c) Mitosis and fertilization
d) Meiosis and fertilization
4. If a parent has Tt alleles, what is the probability that its gametes will contain a T?
a) 0%
b) 25%
c) 50%
d) 75%
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5. If a female parent has a genotype of Aa, which egg cell is more likely to be fertilized by a
sperm cell– the egg cell with ‘A’ or the egg cell with ‘a’?
a) The gamete with ‘A’
b) The gamete with ‘a’
c) They are both equally likely to be fertilized
d) None of the above
6. You can determine the probability of two independent events that occur together by
calculating the probability of each event individually.
a) True
b) False
For the following questions, use the following information: Purple color (P) is dominant
over white color (p) and Tall plants (T) are dominant over short plants (t). You can draw
Punnett Squares if you need to…
10. If a Pp plant is crossed with another Pp plant, what is (are) the expected genotype(s) in
the offspring?
a) 100% Pp
b) 25% PP, 50% Pp, 25% pp
c) 50% PP, 50% pp
d) 75% purple, 25% white
11. What is the likelihood of a heterozygous genotype from a homozygous dominant and a
homozygous recessive parent?
a) 25%
b) 50%
c) 75%
d) 100%
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12. A cross involving two heterozygous parents will likely result in
a) 50% heterozygous offspring.
b) 75% of their offspring with the dominant trait.
c) 25% homozygous dominant offspring.
d) all of the above
13. A ____________ _______________ allows you to determine the expected percent of
different genotypes in the offspring of two parents.
14. Use Long fur (F) is dominant to short fur (f) for the following problem. Determine the
parental genotypes according to the resulting offspring phenotypes: 50% Long fur and
50% short fur.
Parental genotypes:
___________
___________
15. Using a Punnett square, determine the likelihood of a AaBb genotype from a AABB x
aabb cross.
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