Question 1

Camels have a diploid chromosome number of 70. At prophase II, each cell would contain how many tetrads?

Accepted Answer

A)   0
B)   35
C)   70
D)   140
E)   280F) None of the above
G) All of the above

Question 2

A dyad consists of

Accepted Answer

A)   two homologous chromosomes consisting of two sister chromatids.
B)   two homologous chromosomes consisting of two nonsister chromatids.
C)   one duplicated chromosome consisting of two nonsister chromatids.
D)   one duplicated chromosome consisting of two sister chromatids.
E)   two homologous chromosomes consisting of a single DNA strand each.F) B) and E)
G) B) and C) D

Question 3

Swyer syndrome 46, XY, female appearance) , would most likely result from

Accepted Answer

A)   nondisjunction during meiosis I in the female parent.
B)   nondisjunction during meiosis I in the male parent.
C)   nondisjunction during meiosis II in the female parent.
D)   nondisjunction during meiosis II in the male parent.
E)   normal disjunction during meiosis, but deletion of a portion of the Y chromosome in the male parent.F) A) and C)
G) A) and E)

Question 4

Which of the following processes and products are paired correctly?

Accepted Answer

A)   spermatogenesis - 2n zygote
B)   oogenesis - 2n zygote
C)   oogenesis - 1n gamete
D)   meiosis - 2n zygote
E)   mitosis - 1n gameteF) B) and E)
G) A) and D)

Question 5

Camels have a diploid chromosome number of 70. At prophase II, each cell would contain how many chromatids?

Accepted Answer

A)   0
B)   35
C)   70
D)   140
E)   280F) A) and B)
G) C) and D)

Question 6

During crossing-over,

Accepted Answer

A)   genetic material is exchanged between sister chromatids, resulting in new combinations of alleles.
B)   genetic material is exchanged between nonsister chromatids, resulting in new combinations of alleles.
C)   sister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles.
D)   nonsister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles.
E)   one homologous chromosome of a tetrad is exchanged with another tetrad, resulting in new combinations of alleles.F) A) and E)
G) A) and D)

Question 7

The failure of sister chromatids to separate during meiosis is called

Accepted Answer

A)   synapsis.
B)   crossing-over.
C)   tetrad formation.
D)   disjunction.
E)   nondisjunction.F) A) and B)
G) B) and C) E

Question 8

In the human life cycle,

Accepted Answer

A)   meiosis produces haploid gametes, and fertilization creates a diploid cell that divides by mitosis to produce a new individual.
B)   mitosis produces haploid gametes, and fertilization creates a diploid cell that divides by meiosis to produce a new individual.
C)   diploid gametes reproduce by meiosis to produce haploid daughter cells that divide by mitosis to produce a new individual.
D)   diploid gametes reproduce by mitosis to produce diploid daughter cells that divide by meiosis to produce a new individual.
E)   a haploid zygote reproduces by meiosis to produce diploid daughter cells that divide by mitosis to produce a new individual.F) A) and E)
G) All of the above

Question 9

Interphase differs from interkinesis because

Accepted Answer

A)   DNA is duplicated during interphase, but not during interkinesis.
B)   DNA is duplicated during interkinesis, but not during interphase.
C)   homologous chromosomes separate during interkinesis, but not during interphase.
D)   homologous chromosomes separate during interphase, but not during interkinesis.
E)   interkinesis only occurs during mitosis, while interphase occurs during both meiosis and mitosis.F) D) and E)
G) A) and B)

Question 10

During meiosis I, the homologous chromosomes of a tetrad

Accepted Answer

A)   face the same spindle pole.
B)   face both spindle poles.
C)   face opposite spindle poles.
D)   do not face spindle poles but are aligned at the spindle equator.
E)   undergo separation of sister chromatids.F) A) and B)
G) B) and E)

Question 11

Which of the following does not occur twice during meiosis?

Accepted Answer

A)   production of daughter nuclei
B)   spindle formation
C)   pairing of homologous chromosomes
D)   separation of genetic material
E)   alignment of chromosomes at the spindle equatorF) A) and E)
G) B) and D)

Question 12

One major difference between meiosis I and meiosis II is that

Accepted Answer

A)   crossing-over occurs in prophase of meiosis I but not in prophase of meiosis II.
B)   sister chromatids are separated during meiosis I, while homologous chromosomes are separated during meiosis II.
C)   the resulting cells at the end of meiosis I are diploid, while the cells at the end of meiosis II are haploid.
D)   in telophase of meiosis I, four daughter cells form from the parent cell, and in telophase of meiosis II, each parent cell gives rise to two daughter cells.
E)   in meiosis I there is no pairing of chromosomes while homologues pair in meiosis II.F) B) and D)
G) A) and C)

Question 13

Which of the following statements is correct?

Accepted Answer

A)   Meiosis involves two divisions and produces four nonidentical daughter nuclei.
B)   Meiosis involves one division and produces two nonidentical daughter nuclei.
C)   Mitosis involves one division and produces two nonidentical daughter nuclei.
D)   Mitosis involves two divisions and produces four identical daughter nuclei.
E)   Meiosis involves two divisions and produces four identical daughter nuclei.F) B) and D)
G) A) and D) A

Question 14

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

Accepted Answer

A)   1
B)   2
C)   3
D)   4
E)   8F) C) and E)
G) B) and C)

Question 15

The possibility of Down syndrome increases as the mother's age increases because

Accepted Answer

A)   her DNA is damaged through an accumulation of replication errors.
B)   her DNA stops checking for replication errors.
C)   fertilization no longer occurs correctly with older eggs.
D)   the contents of the egg contain the wrong signals for the correct development of the fetus.
E)   the possibility of nondisjunction increases.F) C) and E)
G) A) and B)

Question 16

Which of the diagrams represent a chromosome or chromosome pair in a cell at the end of prophase II?

Accepted Answer

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

Question 17

The human life cycle consists of

Accepted Answer

A)   adults who are haploid and produce diploid gametes; these gametes fuse to produce a haploid zygote which grows into an adult.
B)   zygotes who are haploid fuse to produce a diploid gamete which grows into an adult.
C)   gametes that are diploid and produce haploid zygotes; these grow into haploid adults.
D)   adults who are diploid and produce haploid gametes; these gametes fuse to produce a diploid zygote which grows into an adult.
E)   adults that are diploid who produce zygotes that are also diploid.F) A) and B)
G) C) and D)

Question 18

It is essential that germ cells undergo meiosis so that

Accepted Answer

A)   the cells can differentiate.
B)   the fertilized egg has half the genetic material of the parents.
C)   the number of chromosomes is cut in half in gametes.
D)   genetic disorders are prevented.
E)   genetic diversity is reduced.F) C) and E)
G) B) and E)

Question 19

You are looking at a cell under a microscope and see what appears to be several "X" structures being pulled to each side of the cell. What stage of meiosis are you looking at?

Accepted Answer

A)   anaphase I
B)   prophase I
C)   prophase II
D)   metaphase I
E)   anaphase IIF) A) and B)
G) B) and C)

Question 20

Which of the following is a correct match?

Accepted Answer

A)   separation of tetrads - anaphase II
B)   synapsis - metaphase I
C)   separation of sister chromatids - anaphase I
D)   synapsis - prophase II
E)   separation of sister chromatids - anaphase IIF) D) and E)
G) A) and E)

Exam 9: Meiosis and the Genetic Basis of Sexual Reproduction

Camels have a diploid chromosome number of 70. At prophase II, each cell would contain how many tetrads?

Correct AnswerverifiedShow Answer

A dyad consists of

Correct AnswerverifiedD

Swyer syndrome 46, XY, female appearance) , would most likely result from

Correct AnswerverifiedShow Answer

Which of the following processes and products are paired correctly?

Correct AnswerverifiedShow Answer

Camels have a diploid chromosome number of 70. At prophase II, each cell would contain how many chromatids?

Correct AnswerverifiedShow Answer

During crossing-over,

Correct AnswerverifiedShow Answer

The failure of sister chromatids to separate during meiosis is called

Correct AnswerverifiedE

In the human life cycle,

Correct AnswerverifiedShow Answer

Interphase differs from interkinesis because

Correct AnswerverifiedShow Answer

During meiosis I, the homologous chromosomes of a tetrad

Correct AnswerverifiedShow Answer

Which of the following does not occur twice during meiosis?

Correct AnswerverifiedShow Answer

One major difference between meiosis I and meiosis II is that

Correct AnswerverifiedShow Answer

Which of the following statements is correct?

Correct AnswerverifiedA

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

Correct AnswerverifiedShow Answer

The possibility of Down syndrome increases as the mother's age increases because

Correct AnswerverifiedShow Answer

Which of the diagrams represent a chromosome or chromosome pair in a cell at the end of prophase II?

Correct AnswerverifiedShow Answer

The human life cycle consists of

Correct AnswerverifiedShow Answer

It is essential that germ cells undergo meiosis so that

Correct AnswerverifiedShow Answer

You are looking at a cell under a microscope and see what appears to be several "X" structures being pulled to each side of the cell. What stage of meiosis are you looking at?

Correct AnswerverifiedShow Answer

Which of the following is a correct match?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified
D

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
E

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
A

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified