Question 1
Experimental advantages of using pea plants include which of the following?
a. They came in several different varieties.
b. They were capable of self-fertilization.
c. They were easy to cross.
d. All of the above were advantages.
CORRECT ANSWER
d. All of the above were advantages
Question 2
With regard to Mendel's experiments, the term cross refers to an experiment in which
a. the gametes come from different individuals.
b. the gametes come from a single flower of the same individual.
c. the gametes come from different flowers of the same individual.
d. Both a and c are true.
CORRECT ANSWER
a. the gametes come from different individuals
Question 3
To avoid self-fertilization in his pea plants, Mendel had to
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,a. spray the plants with a chemical that damaged the pollen.
b. remove the anthers from immature flowers.
c. grow the plants in a greenhouse that did not contain pollinators (e.g., bees).
d. do all of the above.
CORRECT ANSWER
d. do all of the above
Question 4
A pea plant is Tt. Which of the following statements is correct?
a. Its genotype is Tt, and its phenotype is dwarf.
b. Its phenotype is Tt, and its genotype is dwarf.
c. Its genotype is Tt, and its phenotype is tall.
d. Its phenotype is Tt, and its genotype is tall.
CORRECT ANSWER
c. its genotype is Tt, and its phenotype is tall
Question 5
A Tt pea plant is crossed to a tt plant. What is the expected ratio of phenotypes for
offspring from this cross?
a. 3 tall : 1 dwarf
b. 1 tall : 1 dwarf
c. 1 tall : 3 dwarf
d. 2 tall : 1 dwarf
CORRECT ANSWER
b. 1 tall : 1 dwarf
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, Question 6
A pea plant has the genotype rrYy. How many different types of gametes can it make and
in what proportions?
a. 1 rr : 1 Yy
b. 1 rY : 1 ry
c. 3 rY : 1 ry
d. 1 RY : 1 rY : 1 Ry : 1 ry
CORRECT ANSWER
b. 1 rY : 1 ry
Question 7
A cross is made between a pea plant that is RrYy and one that is rrYy. What is the
predicted outcome of the seed phenotypes?
a. 9 round, yellow : 3 round, green : 3 wrinkled, yellow : 1 wrinkled, green
b. 3 round, yellow : 3 round, green : 1 wrinkled, yellow : 1 wrinkled, green
c. 3 round, yellow : 1 round, green : 3 wrinkled, yellow : 1 wrinkled, green
d. 1 round, yellow : 1 round, green : 1 wrinkled, yellow : 1 wrinkled, green
CORRECT ANSWER
c. 3 round, yellow : 1 round, green : 3 wrinkled, yellow : 1 wrinkled, green
Question 8
In a population of wild squirrels, most of them have gray fur, but an occasional squirrel is
completely white. If we let P and p represent dominant and recessive alleles, respectively,
of a gene that encodes an enzyme necessary for pigment formation, which of the
following statements do you think is most likely to be correct?
a. The white squirrels are pp, and the p allele is a loss-of-function allele.
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Experimental advantages of using pea plants include which of the following?
a. They came in several different varieties.
b. They were capable of self-fertilization.
c. They were easy to cross.
d. All of the above were advantages.
CORRECT ANSWER
d. All of the above were advantages
Question 2
With regard to Mendel's experiments, the term cross refers to an experiment in which
a. the gametes come from different individuals.
b. the gametes come from a single flower of the same individual.
c. the gametes come from different flowers of the same individual.
d. Both a and c are true.
CORRECT ANSWER
a. the gametes come from different individuals
Question 3
To avoid self-fertilization in his pea plants, Mendel had to
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,a. spray the plants with a chemical that damaged the pollen.
b. remove the anthers from immature flowers.
c. grow the plants in a greenhouse that did not contain pollinators (e.g., bees).
d. do all of the above.
CORRECT ANSWER
d. do all of the above
Question 4
A pea plant is Tt. Which of the following statements is correct?
a. Its genotype is Tt, and its phenotype is dwarf.
b. Its phenotype is Tt, and its genotype is dwarf.
c. Its genotype is Tt, and its phenotype is tall.
d. Its phenotype is Tt, and its genotype is tall.
CORRECT ANSWER
c. its genotype is Tt, and its phenotype is tall
Question 5
A Tt pea plant is crossed to a tt plant. What is the expected ratio of phenotypes for
offspring from this cross?
a. 3 tall : 1 dwarf
b. 1 tall : 1 dwarf
c. 1 tall : 3 dwarf
d. 2 tall : 1 dwarf
CORRECT ANSWER
b. 1 tall : 1 dwarf
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, Question 6
A pea plant has the genotype rrYy. How many different types of gametes can it make and
in what proportions?
a. 1 rr : 1 Yy
b. 1 rY : 1 ry
c. 3 rY : 1 ry
d. 1 RY : 1 rY : 1 Ry : 1 ry
CORRECT ANSWER
b. 1 rY : 1 ry
Question 7
A cross is made between a pea plant that is RrYy and one that is rrYy. What is the
predicted outcome of the seed phenotypes?
a. 9 round, yellow : 3 round, green : 3 wrinkled, yellow : 1 wrinkled, green
b. 3 round, yellow : 3 round, green : 1 wrinkled, yellow : 1 wrinkled, green
c. 3 round, yellow : 1 round, green : 3 wrinkled, yellow : 1 wrinkled, green
d. 1 round, yellow : 1 round, green : 1 wrinkled, yellow : 1 wrinkled, green
CORRECT ANSWER
c. 3 round, yellow : 1 round, green : 3 wrinkled, yellow : 1 wrinkled, green
Question 8
In a population of wild squirrels, most of them have gray fur, but an occasional squirrel is
completely white. If we let P and p represent dominant and recessive alleles, respectively,
of a gene that encodes an enzyme necessary for pigment formation, which of the
following statements do you think is most likely to be correct?
a. The white squirrels are pp, and the p allele is a loss-of-function allele.
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