Question 1

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

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=2F) B) and C)
G) A) and E)

Question 2

Chromosomes that occur in pairs and code for the same traits are called _____________ chromosomes; these do not include the __________________ chromosomes which code for gender.

Accepted Answer

A)   homologous; autosomes
B)   autosomes; homologous
C)   diploid; haploid
D)   homologous: sex
E)   sex; autosomesF) B) and D)
G) A) and C)

Question 3

Which of the following phases results in separation of sister chromatids into daughter chromosomes?

Accepted Answer

A)   anaphase of mitosis
B)   anaphase I, anaphase II, and anaphase of mitosis
C)   anaphase I and anaphase II
D)   anaphase I and anaphase of mitosis
E)   anaphase II and anaphase of mitosisF) B) and D)
G) C) and D) E

Question 4

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=4F) A) and E)
G) A) and D)

Question 5

Which of the following is not a symptom of Down syndrome?

Accepted Answer

A)   increased mental abilities
B)   eyelid fold
C)   stubby fingers
D)   short stature
E)   fissured tongueF) A) and B)
G) A) and E)

Question 6

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) None of the above

Question 7

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)   16F) B) and E)
G) B) and C)

Question 8

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 portion of the Y chromosome in the male parent.F) None of the above
G) All of the above

Question 9

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) All of the above
G) B) and E)

Question 10

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; 240F) D) and E)
G) B) and D)

Question 11

Which of the following statements is true?

Accepted Answer

A)   Chromosomes are classified into two categories, the sex chromosomes that determine gender and autosomes that determine non-gender related traits.
B)   Homologous chromosomes differ in banding patterns, the traits they code for and size.
C)   While sex chromosomes determine different genders they look the same until they are stained.
D)   In humans all 46 chromosomes have an identical match called the homologue.
E)   Chromosomes are classified into two categories, autosomes that determine gender and the sex chromosomes that determine non-gender related traits.F) A) and E)
G) D) and E)

Question 12

In each gamete following telophase II,how many copies of each gene is/are present?

Accepted Answer

A)   1
B)   2
C)   3
D)   4
E)   8F) All of the above
G) A) and B) A

Question 13

An 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.F) A) and B)
G) A) and C)

Question 14

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 D)
G) B) and C)

Question 15

An individual with the karyotype 48,XYYY would have how many Barr bodies?

Accepted Answer

A)   0
B)   1
C)   2
D)   3
E)   4F) B) and D)
G) B) and C)

Question 16

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) All of the above
G) A) and B) A

Question 17

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) C) and E)
G) A) and B)

Question 18

All but which one of these results from nondisjunction?

Accepted Answer

A)   trisomy
B)   diploidy
C)   monosomy
D)   polyploidy
E)   Down syndromeF) A) and D)
G) None of the above

Question 19

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 syndromeF) B) and E)
G) B) and C)

Question 20

Figure: 
-Which of the diagrams represents a 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) A) and D)

Exam 9: Meiosis and the Genetic Basis of Sexual Reproduction

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

Correct AnswerverifiedShow Answer

Chromosomes that occur in pairs and code for the same traits are called _____________ chromosomes; these do not include the __________________ chromosomes which code for gender.

Correct AnswerverifiedShow Answer

Which of the following phases results in separation of sister chromatids into daughter chromosomes?

Correct AnswerverifiedE

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

Correct AnswerverifiedShow Answer

Which of the following is not a symptom of Down syndrome?

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The failure of sister chromatids to separate during meiosis is called

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following statements is true?

Correct AnswerverifiedShow Answer

In each gamete following telophase II,how many copies of each gene is/are present?

Correct AnswerverifiedA

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

Correct AnswerverifiedShow Answer

Which of the following processes and products are paired correctly?

Correct AnswerverifiedShow Answer

An individual with the karyotype 48,XYYY would have how many Barr bodies?

Correct AnswerverifiedShow Answer

Interphase differs from interkinesis because

Correct AnswerverifiedA

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

Correct AnswerverifiedShow Answer

All but which one of these results from nondisjunction?

Correct AnswerverifiedShow Answer

Which of the following human syndromes is a monosomy?

Correct AnswerverifiedShow Answer

Figure: -Which of the diagrams represents a chromosome pair in a cell at the end of prophase II?

Correct AnswerverifiedShow Answer

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Chromosomes that occur in pairs and code for the same traits are called _ chromosomes; these do not include the ______ chromosomes which code for gender.

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E

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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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A

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A

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