Question 1

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) A) and E)
G) None of the above

Question 2

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) A) and C)
G) A) and D)

Question 3

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) None of the above
G) A) and B)

Question 4

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) A) and D)
G) B) and C)

Question 5

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.F) All of the above
G) B) and C) C

Question 6

An individual with Swyer syndrome (46, XY)  differs from an individual with Klinefelter syndrome (47, XXY)  because

Accepted Answer

A)   an individual with Swyer syndrome has a Barr body, while an individual with Klinefelter syndrome does not.
B)   an individual with Klinefelter syndrome has a functional SRY gene on his Y chromosome, whereas an individual with Swyer syndrome does not.
C)   both individuals have a functional SRY gene, but the extra X chromosome makes the individual with Klinefelter syndrome appear female.
D)   neither individual has a functional SRY gene, but the X chromosome of the individual with Swyer syndrome has a functional SRY and appears male.
E)   an individual with Swyer syndrome lacks a functional SRY gene, but appears male because it has moved to the X chromosome as in an individual with Klinefelter syndrome.F) C) and D)
G) B) and D)

Question 7

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 chromosome number constant from one generation to the next
E)   produce gametesF) B) and C)
G) B) and E)

Question 8

Down 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, XOF) A) and B)
G) A) and C)

Question 9

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; diploidF) None of the above
G) B) and E)

Question 10

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

Question 11

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 B)
G) None of the above

Question 12

All but which one of these results from nondisjunction?

Accepted Answer

A)   trisomy
B)   diploidy
C)   monosomy
D)   polyploidyE) All of the above
F) C) and D)

Question 13

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

Question 14

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) A) and D)
G) B) and E)

Question 15

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) All of the above
G) B) and D) C

Question 16

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; autosomesF) C) and D)
G) A) and B)

Question 17

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 cells gives rise to two daughter cells.
E)   in meiosis I there is no pairing of chromosomes while homologues pair in meiosis II.F) A) and B)
G) B) and D) A

Question 18

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 D)
G) A) and C)

Question 19

Which of the following processes does not contribute to creating genetic variability in the offspring?

Accepted Answer

A)   crossing-over
B)   independent assortment of chromosomes
C)   pairing of homologous chromosomes
D)   interkinesis
E)   different alleles of the same geneF) A) and D)
G) A) and E)

Question 20

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 D)
G) D) and E)

Exam 9: Sexual Reproduction

Which of the following human syndromes is a monosomy?

Correct AnswerverifiedShow Answer

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

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

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 is not correct about crossing over?

Correct AnswerverifiedC

An individual with Swyer syndrome (46, XY) differs from an individual with Klinefelter syndrome (47, XXY) because

Correct AnswerverifiedShow Answer

Which of the following is not a function of meiosis?

Correct AnswerverifiedShow Answer

Down syndrome is associated with which of the following karyotypes?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

In the human life cycle,

Correct AnswerverifiedShow Answer

All but which one of these results from nondisjunction?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following processes and products are paired correctly?

Correct AnswerverifiedC

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

One major difference between meiosis I and meiosis II is that

Correct AnswerverifiedA

Which of the following statements is true?

Correct AnswerverifiedShow Answer

Which of the following processes does not contribute to creating genetic variability in the offspring?

Correct AnswerverifiedShow Answer

It is essential that germ cells undergo meiosis so that

Correct AnswerverifiedShow Answer

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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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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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C

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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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C

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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A

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