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Chapter 13
Meiosis and Sexual
Life Cycles
Active Lecture Questions for use with Classroom Response Systems
Biology, Seventh Edition
Neil Campbell and Jane Reece
Edited by William Wischusen, Louisiana State University
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings
1. How do cells at the completion of meiosis compare
with cells that have replicated their DNA and are just
about to begin meiosis?
a. They have twice the amount of cytoplasm and half the
amount of DNA.
b. They have half the number of chromosomes and half
the amount of DNA.
c. They have the same number of chromosomes and
half the amount of DNA.
d. They have half the number of chromosomes and onefourth the amount of DNA.
e. They have half the amount of cytoplasm and twice the
amount of DNA.
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings
2. Which number represents G2? *
a. I
b. II
c. III
d. IV
e. V
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings
3. Which number represents the DNA content of
a sperm cell?
a. I
b. II
c. III
d. IV
e. V
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings
4. The DNA content of a diploid cell in the G1
phase of the cell cycle is measured. If the
DNA content is x, then the DNA content of the
same cell at metaphase of meiosis I would be
a. 0.25x
b. 0.5x
c. x.
d. 2x.
e. 4x.
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings
5. The DNA content of a diploid cell in the G1
phase of the cell cycle is measured. If the
DNA content is x, then the DNA content at
metaphase of meiosis II would be
a. 0.25x.
b. 0.5x.
c. x.
d. 2x.
e. 4x.
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings
6. The DNA content of a cell is measured in the
G2 phase. After meiosis I, the DNA content of
one of the two cells produced would be
a. equal to that of the G2 cell.
b. twice that of the G2 cell.
c. one-half that of the G2 cell.
d. one-fourth that of the G2 cell.
e. impossible to estimate due to independent
assortment of homologous chromosomes.
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings
7. Which of the following would not be
considered a haploid cell?
a. daughter cell after meiosis II
b. gamete
c. daughter cell after mitosis in gametophyte
generation of a plant
d. cell in prophase I
e. cell in prophase II
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings
8. A cell in G2 before meiosis compared with one of the
four cells produced by that meiotic division has
a. twice as much DNA and twice as many
chromosomes.
b. four times as much DNA and twice as many
chromosomes.
c. four times as much DNA and four times as many
chromosomes.
d. half as much DNA but the same number of
chromosomes.
e. half as much DNA and half as many chromosomes.
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings
Chapter 14
Mendel and the Gene Idea
Active Lecture Questions for use with Classroom Response Systems
Biology, Seventh Edition
Neil Campbell and Jane Reece
Edited by William Wischusen, Louisiana State University
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings
1. A couple who are both carriers of the gene
for cystic fibrosis have two children who have
cystic fibrosis. What is the probability that their
next child will have cystic fibrosis?
a. 0%
b. 25%
c. 50%
d. 75%
e. 100%
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings
2. A couple who are both carriers of the gene
for cystic fibrosis have two children who have
cystic fibrosis. What is the probability that their
next child will be phenotypically normal?
a. 0%
b. 25%
c. 50%
d. 75%
e. 100%
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings
3. In cattle, roan coat color (mixed red and white hairs)
occurs in the heterozygous (Rr) offspring of red (RR)
and white (rr) homozygotes. When two roan cattle are
crossed, the phenotypes of the progeny are found to
be in the ratio of 1 red:2 roan:1 white. Which of the
following crosses could produce the highest
percentage of roan cattle? *
a. red  white
b. roan  roan
c. white  roan
d. red  roan
e. All of the above crosses would give the same
percentage of roan.
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings
4. What is the probability that individual C-1
is Ww?
a. 3/4
b. 1/4
c. 2/4
d. 2/3
e. 1
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings
5. A woman and her spouse both show the normal
phenotype for pigmentation, but both had one parent
who was an albino. Albinism is an autosomal
recessive trait. If their first two children have normal
pigmentation, what is the probability that their third
child will be an albino?
a. 0
b. 1/4
c. 1/2
d. 3/4
e. 1
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings
6. In a cross AaBbCc  AaBbCc, what is the
probability of producing the genotype
AABBCC?
a. 1/4
b. 1/8
c. 1/16
d. 1/32
e. 1/64
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings
7. Feather color in budgies is determined by two
different genes that affect the pigmentation of the
outer feather and its core. Y_B_ is green; yyB_ is
blue; Y_bb is yellow; and yybb is white. A green
budgie is crossed with a blue budgie. Which of the
following results is not possible?
a. all green offspring
b. all blue offspring
c. all white offspring
d. all yellow offspring
e. All of the above are possible, but with different
probabilities.
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings
8. Three babies were recently mixed up in a hospital.
After consideration of the data below, which of the
following represent the correct baby/parent
combinations?
Couple #
Blood groups
Baby #
Blood groups
I
A and A
1
B
a. I-3, II-1, III-2
b. I-1, II-3, III-2
c. I-2, II-3, III-1
d. I-2, II-1, III-3
e. I-3, II-2, III-1
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings
II
A and B
2
O
III
B and O
3
AB
9. A man is brought to court in a paternity case.
He has blood type B, Rh positive. The mother
has blood type B, Rh negative.
Which blood type of a child would exclude the
accused from paternity?
a. AB, Rh negative
b. B, Rh negative
c. O, Rh negative
d. B, Rh positive
e. None of these choices will exclude.
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings
10. You are handed a “mystery’’ pea plant with long stems and axial
flowers, and asked to determine its genotype as quickly as
possible. You know the allele for long stems (L) is dominant to that
for dwarf stems (l) and that the allele for axial flowers (A) is
dominant to that for terminal flowers (a). You cross the “mystery”
plant with a dwarf stemmed axial flowered plant. If your mystery
plant is heterozygous at both loci, what is/are the expected
proportion of offspring?
a. 100% long stemmed terminal flowered
b. 100% dwarf stemmed terminal flowered
c.
100% long stemmed axial flowered
d. 50% long stemmed axial flowered, 50% dwarf stemmed terminal
flowered
e. 25% long stemmed axial flowered, 25% long stemmed terminal
flowered, 25% dwarf stemmed axial flowered, 25% dwarf
stemmed terminal flowered
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings
11. You think that two alleles for coat color in mice show
incomplete dominance. What is the best and
simplest cross to perform in order to support your
hypothesis?
a. a testcross of a homozygous recessive mouse with a
mouse of unknown genotype
b. a cross of F1 mice to look for a 1:2:1 ratio in the
offspring
c. a reciprocal cross in which the sex of the mice of
each coat color is reversed
d. a cross of two true-breeding mice of different colors
to look for an intermediate phenotype in the F1
e. a cross of F1 mice to look for a 9:7 ratio in the
offspring
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings
12. A mother with type B blood has two children, one
with type A blood and one with type O blood. Her
husband has type O blood. Which of the following
could you conclude from this information?
a. The husband could not have fathered either child.
b. The husband could have fathered both children.
c. The husband must be the father of the child with type
O blood and could be the father of the type A child.
d. The husband could be the father of the child with
type O blood, but not the type A child.
e. Neither the mother nor the husband could be the
biological parent of the type A child.
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings
Chapter 15
The Chromosomal Basis
of Inheritance
Active Lecture Questions for use with Classroom Response Systems
Biology, Seventh Edition
Neil Campbell and Jane Reece
Edited by William Wischusen, Louisiana State University
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings
1. Vermilion eyes is a sex-linked recessive
characteristic in fruit flies. If a female having
vermilion eyes is crossed with a wild-type
male, what percentage of the F1 males will
have vermilion eyes?
a. 0%
b. 25%
c. 50%
d. 75%
e. 100%
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings
2. Barring in chickens is due to a sex-linked
dominant gene (B). The sex of chicks at hatching
is difficult to determine, but barred chicks can be
distinguished from nonbarred at that time. To use
this trait so that at hatching all chicks of one sex
are barred, what cross would you make?
a. barred males  barred females
b. barred males  nonbarred females
c. nonbarred males  barred females
d. nonbarred males  nonbarred females
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings
3. A recessive allele on the X chromosome is
responsible for red-green color blindness in
humans. A woman with normal vision whose
father is color-blind marries a color-blind male.
What is the probability that this couple’s son will
be color-blind?
a. 0
b. 1/4
c. 1/2
d. 3/4
e. 1
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings
4. An achondroplastic dwarf man with normal vision marries
a color-blind woman of normal height. The man's father
was six feet tall, and both the woman's parents were of
average height. Achondroplastic dwarfism is autosomal
dominant, and red-green color blindness is X-linked
recessive.
How many of their female children might be expected to
be color-blind dwarfs? *
a. all
b. none
c. half
d. one out of four
e. three out of four
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings
5. An achondroplastic dwarf man with normal vision marries
a color-blind woman of normal height. The man's father
was six feet tall, and both the woman's parents were of
average height. Achondroplastic dwarfism is autosomal
dominant, and red-green color blindness is X-linked
recessive.
How many of their male children would be color-blind and
normal height?
a. all
b. none
c. half
d. one out of four
e. three out of four
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings
6. In cats, black color is caused by an X-linked
allele; the other allele at this locus causes
orange color. The heterozygote is tortoiseshell.
What kinds of offspring would you expect from
the cross of a black female and an orange male?
a. tortoiseshell female; tortoiseshell male
b. black female; orange male
c. orange female; orange male
d. tortoiseshell female; black male
e. orange female; black male
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings
7. Red-green color blindness is a sex-linked
recessive trait in humans. Two people with
normal color vision have a color-blind son. What
are the genotypes of the parents?
a. XcXc and XcY
b. XcXc and XCY
c. XCXC and XcY
d. XCXC and XCY
e. XCXc and XCY
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings
8. A color-blind son inherited this trait from his
a. mother.
b. father.
c. mother only if she is color-blind.
d. father only if he is color-blind.
e. mother only if she is not color-blind.
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings
ANSWERS
Ch 13
1.
2.
3.
D
B
E
Ch 14
Ch 15
1. B
1. E
2. D
2. B
3. A
3. C
4. E
4. B
5. B
5. C
4.
D
6. E
6. D
5.
C
7. E
7. E
6.
C
8. C
8. A
7.
D
9. A
8.
B
10. E
11. D
12. D
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings