Question 1

Which of the following is not a function of meiosis?

Accepted Answer

A)   cause an organism to grow
B)   create genetic variability
C)   reduce the chromosome number in gametes
D)   keep the chromosome number constant from one generation to the next
E)   produce gametes

Question 2

During which stage of meiosis will the pairs of homologous chromosomes line up?

Accepted Answer

A)   metaphase I
B)   metaphase II
C)   metaphase
D)   anaphase I
E)   prophase II

Question 3

For the figure shown here, indicate the correct stage of meiosis and the diploid number of the cell.

Accepted Answer

A)   prophase I, 2n=4
B)   prophase II, 2n=4
C)   metaphase I, 2n=4
D)   metaphase II, 2n=2
E)   anaphase II, 2n=2

Question 4

During meiosis II,

Accepted Answer

A)   homologous chromosomes line up separately, with sister chromatids facing the same spindle pole.
B)   chromosomes line up separately, with sister chromatids facing opposite spindle poles.
C)   chromosomes line up separately, with sister chromatids facing the same spindle pole.
D)   homologous chromosomes line up separately, with sister chromatids facing opposite spindle poles.
E)   homologous chromosomes line up together, with sister chromatids facing opposite spindle poles.

Question 5

Following meiosis I, the daughter cells are ________; following meiosis II, the daughter cells are ________; and following mitosis, the daughter cells are ________.

Accepted Answer

A)   diploid; haploid; diploid
B)   diploid; diploid; haploid
C)   haploid; haploid; diploid
D)   haploid; haploid; haploid
E)   diploid; diploid; diploid

Question 6

Which of the following human syndromes is a monosomy?

Accepted Answer

A)   Turner syndrome
B)   Klinefelter syndrome
C)   Down syndrome
D)   Swyer syndrome
E)   Barr body syndrome

Question 7

During prophase II, a diploid organism contains how many copies of each gene?

Accepted Answer

A)   1
B)   2
C)   3
D)   4
E)   8

Question 8

For the figure shown here, indicate the correct stage of meiosis and diploid chromosome number.

Accepted Answer

A)   metaphase II, 2n=4
B)   metaphase II, 2n=2
C)   metaphase II, 2n=8
D)   metaphase I, 2n=4
E)   metaphase I, 2n=8

Question 9

Which statement best describes how the members of a tetrad are separated during meiosis I?

Accepted Answer

A)   The two homologous chromosomes of a tetrad separate into different daughter nuclei.
B)   The sister chromatids of each chromosome separate into different daughter nuclei.
C)   The nonsister chromatids of each tetrad separate into different daughter nuclei.
D)   The two homologous chromosomes of a tetrad separate into one of two daughter nuclei.
E)   The two homologous chromosomes of a tetrad are duplicated and separate into each daughter nucleus.

Question 10

A human egg with 22 chromosomes that is fertilized by a normal sperm will result in

Accepted Answer

A)   a zygote with trisomy.
B)   a zygote with disomy.
C)   a zygote with monosomy.
D)   a zygote with normal chromosome number.
E)   nondisjunction during subsequent mitosis.

Question 11

Klinefelter syndrome can result from nondisjunction during

Accepted Answer

A)   meiosis I in the female parent.
B)   meiosis I in the male parent.
C)   meiosis I in either female parent.
D)   meiosis I or II in the male parent.
E)   meiosis I or II in either parent.

Question 12

It would be possible for a male and a female to have exactly the same ________, but they would have to differ in ________.

Accepted Answer

A)   diploid chromosomes; haploid chromosomes
B)   autosomes; sex chromosomes
C)   homologues; autosomes
D)   karyotype; sex chromosomes
E)   karyotype; autosomes

Question 13

Armadillos have a diploid chromosome number of 64. At prophase I, an armadillo's cell would have ________ tetrads present.

Accepted Answer

A)   16
B)   32
C)   64
D)   80
E)   128

Question 14

All but which one of the following results from nondisjunction?

Accepted Answer

A)   trisomy
B)   diploidy
C)   monosomy
D)   polyploidy
E)   Down syndrome

Question 15

Which of the following is not correct about crossing-over?

Accepted Answer

A)   Crossing-over is preceded by a process known as synapsis, where homologous chromosomes attach to each other.
B)   Crossing-over results in greater genetic variability in offspring.
C)   Crossing-over is only detectable when it occurs between sister chromatids.
D)   Crossing-over occurs during prophase I when homologous chromosomes line up prior to separation.
E)   In humans, crossing-over occurs an average of approximately two events per chromosome.

Question 16

Goats have a diploid chromosome number of 60. At prophase I, each cell would have ________ tetrads present, for a total of ________ chromatids.

Accepted Answer

A)   30; 120
B)   30; 60
C)   60; 120
D)   60; 240
E)   30; 240

Question 17

For the figure shown here, indicate the correct stage of meiosis and diploid chromosome number.

Accepted Answer

A)   anaphase I, 2n=16
B)   anaphase II, 2n=16
C)   anaphase I, 2n=8
D)   anaphase II, 2n=8
E)   anaphase II, 2n=4

Question 18

Turner syndrome is associated with which of the following karyotypes?

Accepted Answer

A)   47, XXY
B)   47, XXX
C)   46, XY
D)   47, XY, trisomy 21
E)   45, XO

Question 19

During G1 stage of interphase, a diploid organism contains how many copies of each gene?

Accepted Answer

A)   1
B)   2
C)   4
D)   8
E)   16

Question 20

Which of the diagrams best illustrates the appearance of a chromosome or chromosome pair at the end of prophase I?

Accepted Answer

A)   diagram 1
B)   diagram 2
C)   diagram 3
D)   diagram 4
E)   diagram 5

Exam 9: Meiosis and the Genetic Basis of Sexual Reproduction

All but which one of the following results from nondisjunction?

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During prophase II, a diploid organism contains how many copies of each gene?

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Armadillos have a diploid chromosome number of 64. At prophase I, an armadillo's cell would have ________ tetrads present.

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During G1 stage of interphase, a diploid organism contains how many copies of each gene?

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During which stage of meiosis will the pairs of homologous chromosomes line up?

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Which of the following human syndromes is a monosomy?

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Goats have a diploid chromosome number of 60. At prophase I, each cell would have ________ tetrads present, for a total of ________ chromatids.

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Which of the following is not a function of meiosis?

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A human egg with 22 chromosomes that is fertilized by a normal sperm will result in

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Which of the following is not correct about crossing-over?

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Following meiosis I, the daughter cells are ________; following meiosis II, the daughter cells are ________; and following mitosis, the daughter cells are ________.

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Which statement best describes how the members of a tetrad are separated during meiosis I?

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Klinefelter syndrome can result from nondisjunction during

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For the figure shown here, indicate the correct stage of meiosis and diploid chromosome number.

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During meiosis II,

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Turner syndrome is associated with which of the following karyotypes?

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For the figure shown here, indicate the correct stage of meiosis and diploid chromosome number.

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Which of the diagrams best illustrates the appearance of a chromosome or chromosome pair at the end of prophase I?

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For the figure shown here, indicate the correct stage of meiosis and the diploid number of the cell.

Correct AnswerverifiedShow Answer

It would be possible for a male and a female to have exactly the same ________, but they would have to differ in ________.

Correct AnswerverifiedShow Answer

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During G₁ stage of interphase, a diploid organism contains how many copies of each gene?

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Goats have a diploid chromosome number of 60. At prophase I, each cell would have tetrads present, for a total of chromatids.

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Following meiosis I, the daughter cells are ; following meiosis II, the daughter cells are ; and following mitosis, the daughter cells are .

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It would be possible for a male and a female to have exactly the same , but they would have to differ in .

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