Question 1

Somatic cells of roundworms have four individual chromosomes per cell. How many chromosomes would you expect to find in an ovum from a roundworm?

Accepted Answer

A)   four
B)   two
C)   eight
D)   a diploid number

Question 2

Refer to the life cycles illustrated in the figure below to answer the following questions.
 
-In a life cycle such as that shown in part III of the figure above, if the zygote's chromosome number is ten, which of the following statements will be true?

Accepted Answer

A)   The sporophyte's chromosome number per cell is ten and the gametophyte's is five.
B)   The sporophyte's chromosome number per cell is five and the gametophyte's is ten.
C)   The sporophyte and gametophyte each have ten chromosomes per cell.
D)   The sporophyte and gametophyte each have five chromosomes per cell.

Question 3

During which of the following processes do homologous pairs of chromosomes align adjacent to one another at the metaphase plate of a cell?

Accepted Answer

A)   metaphase of mitosis
B)   metaphase I of meiosis
C)   telophase II of meiosis
D)   metaphase II of meiosis

Question 4

Imagine that there are 25 different species of protists living in a tide pool. Some of these species reproduce both sexually and asexually, and some of them can reproduce only asexually. The pool gradually becomes infested with disease-causing viruses and bacteria. Which species are more likely to thrive in the changing environment?

Accepted Answer

A)   The sexually reproducing species is likely to thrive.
B)   The asexually reproducing species is likely to thrive.
C)   Sexually and asexually reproducing species are equally likely to thrive.
D)   Neither species will be able to thrive. A

Question 5

Which of the following statements describes an example of alternation of generations?

Accepted Answer

A)   A grandparent and grandchild each have dark hair, but the parent has blond hair.
B)   A diploid plant (sporophyte)  produces a spore by meiosis that gives rise to a multicellular, haploid pollen grain (gametophyte) .
C)   A diploid animal produces gametes by meiosis, and the gametes undergo fertilization to produce a diploid zygote.
D)   A haploid mushroom produces gametes by mitosis, and the gametes undergo fertilization, which is immediately followed by meiosis.

Question 6

During which of the following phases of meiosis do homologous chromosomes separate?

Accepted Answer

A)   anaphase II
B)   prophase I
C)   mitosis
D)   anaphase I

Question 7

Which of the following processes facilitates the fastest way for organisms to adapt to a changing environment?

Accepted Answer

A)   mutation
B)   asexual reproduction
C)   sexual reproduction
D)   mitosis C

Question 8

Refer to the drawings in the figure below of a single pair of homologous chromosomes as they might appear during various stages of either mitosis or meiosis, and answer the following question(s) .
 
-Which diagram represents anaphase II of meiosis?

Accepted Answer

A)   I
B)   III
C)   IV
D)   V

Question 9

Which of the following processes occur during meiosis but not mitosis?

Accepted Answer

A)   Haploid cells fuse to form diploid cells.
B)   Haploid cells multiply into more haploid cells.
C)   Diploid cells form haploid cells.
D)   A diploid cell combines with a haploid cell.

Question 10

Which of the following statements describes the chromosomal makeup of each daughter cell after telophase of meiosis I?

Accepted Answer

A)   The cells are diploid, and the chromosomes are each composed of a single chromatid.
B)   The cells are diploid, and the chromosomes are each composed of two chromatids.
C)   The cells are haploid, and the chromosomes are each composed of a single chromatid.
D)   The cells are haploid, and the chromosomes are each composed of two chromatids.

Question 11

If a horticulturist breeding gardenias succeeds in having a single plant with a particularly desirable set of traits, which of the following would be her most probable and efficient route to establishing a line of such plants?

Accepted Answer

A)   Backtrack through her previous experiments to obtain another plant with the same traits.
B)   Breed this plant with another plant with much weaker traits.
C)   Clone the plant.
D)   Force the plant to self-pollinate to obtain an identical one.

Question 12

Crossing over of chromosomes normally takes place during which of the following processes?

Accepted Answer

A)   meiosis II
B)   meiosis I
C)   mitosis
D)   mitosis and meiosis II B

Question 13

Which of the following statements correctly describes a karyotype?

Accepted Answer

A)   It is a display of all of the cell types in an organism.
B)   It is an organized image of a cell's chromosomes.
C)   It reveals the appearance of an organism.
D)   It is a display of a cell's mitotic stages.

Question 14

Which of the following statements describes one characteristic of each chromosome in a cell during the entire process of meiosis I?

Accepted Answer

A)   Each chromosome is paired with a homologous chromosome.
B)   Each chromosome consists of two sister chromatids joined by a centromere.
C)   Each chromosome consists of a single strand of DNA.
D)   Each chromosome is joined with its homologous pair to form a synaptonemal complex.

Question 15

Quaking aspen trees can send out underground stems for asexual reproduction. Sexual reproduction is not as common, but when it does happen, the haploid gametes have 19 chromosomes. How many chromosomes are in the cells of the underground stems?

Accepted Answer

A)   9
B)   10
C)   19
D)   38

Question 16

Which of the following processes occurs when homologous chromosomes cross over in meiosis I?

Accepted Answer

A)   Two sister chromatids get tangled, resulting in one re-sequencing its DNA.
B)   Two sister chromatids exchange identical pieces of DNA.
C)   Corresponding segments of non-sister chromatids are exchanged.
D)   Maternal alleles are "corrected" to be like paternal alleles and vice versa.

Question 17

How does natural selection apply to sexual reproduction as opposed to asexual reproduction?

Accepted Answer

A)   Sexual reproduction results in many new gene combinations, some of which will lead to differential reproduction.
B)   Sexual reproduction results in the greatest number of new mutations.
C)   Sexual reproduction allows the greatest number of offspring to be produced.
D)   Sexual reproduction utilizes far less energy than asexual reproduction.

Question 18

Many organisms spend most of their life cycle in the diploid state. If meiosis produces haploid cells, how is the diploid number restored for these types of organisms?

Accepted Answer

A)   by DNA replication
B)   through the transcription of DNA to RNA
C)   by synapsis of the homologous pairs of chromosomes during prophase of meiosis I
D)   by fertilization

Question 19

At which stage of mitosis are chromosomes usually photographed in the preparation of a karyotype?

Accepted Answer

A)   prophase
B)   metaphase
C)   anaphase
D)   interphase

Question 20

Refer to the life cycles illustrated in the figure below to answer the following questions.
 
-Which of the life cycles is typical for plants and some algae?

Accepted Answer

A)   I only
B)   II only
C)   III only
D)   I and III

Exam 13: Meiosis and Sexual Life Cycles

Somatic cells of roundworms have four individual chromosomes per cell. How many chromosomes would you expect to find in an ovum from a roundworm?

Correct Answer
verified

Refer to the life cycles illustrated in the figure below to answer the following questions. -In a life cycle such as that shown in part III of the figure above, if the zygote's chromosome number is ten, which of the following statements will be true?

Correct Answer
verified

During which of the following processes do homologous pairs of chromosomes align adjacent to one another at the metaphase plate of a cell?

Correct Answer
verified

Correct Answer
verified
A

Which of the following statements describes an example of alternation of generations?

Correct Answer
verified

During which of the following phases of meiosis do homologous chromosomes separate?

Correct Answer
verified

Which of the following processes facilitates the fastest way for organisms to adapt to a changing environment?

Correct Answer
verified
C

Refer to the drawings in the figure below of a single pair of homologous chromosomes as they might appear during various stages of either mitosis or meiosis, and answer the following question(s) . -Which diagram represents anaphase II of meiosis?

Correct Answer
verified

Which of the following processes occur during meiosis but not mitosis?

Correct Answer
verified

Which of the following statements describes the chromosomal makeup of each daughter cell after telophase of meiosis I?

Correct Answer
verified

If a horticulturist breeding gardenias succeeds in having a single plant with a particularly desirable set of traits, which of the following would be her most probable and efficient route to establishing a line of such plants?

Correct Answer
verified

Crossing over of chromosomes normally takes place during which of the following processes?

Correct Answer
verified
B

Which of the following statements correctly describes a karyotype?

Correct Answer
verified

Which of the following statements describes one characteristic of each chromosome in a cell during the entire process of meiosis I?

Correct Answer
verified

Quaking aspen trees can send out underground stems for asexual reproduction. Sexual reproduction is not as common, but when it does happen, the haploid gametes have 19 chromosomes. How many chromosomes are in the cells of the underground stems?

Correct Answer
verified

Which of the following processes occurs when homologous chromosomes cross over in meiosis I?

Correct Answer
verified

How does natural selection apply to sexual reproduction as opposed to asexual reproduction?

Correct Answer
verified

Many organisms spend most of their life cycle in the diploid state. If meiosis produces haploid cells, how is the diploid number restored for these types of organisms?

Correct Answer
verified

At which stage of mitosis are chromosomes usually photographed in the preparation of a karyotype?

Correct Answer
verified

Refer to the life cycles illustrated in the figure below to answer the following questions. -Which of the life cycles is typical for plants and some algae?

Correct Answer
verified

Exam 13: Meiosis and Sexual Life Cycles

Somatic cells of roundworms have four individual chromosomes per cell. How many chromosomes would you expect to find in an ovum from a roundworm?

Correct AnswerverifiedShow Answer

Refer to the life cycles illustrated in the figure below to answer the following questions. -In a life cycle such as that shown in part III of the figure above, if the zygote's chromosome number is ten, which of the following statements will be true?

Correct AnswerverifiedShow Answer

During which of the following processes do homologous pairs of chromosomes align adjacent to one another at the metaphase plate of a cell?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedA

Which of the following statements describes an example of alternation of generations?

Correct AnswerverifiedShow Answer

During which of the following phases of meiosis do homologous chromosomes separate?

Correct AnswerverifiedShow Answer

Which of the following processes facilitates the fastest way for organisms to adapt to a changing environment?

Correct AnswerverifiedC

Refer to the drawings in the figure below of a single pair of homologous chromosomes as they might appear during various stages of either mitosis or meiosis, and answer the following question(s) . -Which diagram represents anaphase II of meiosis?

Correct AnswerverifiedShow Answer

Which of the following processes occur during meiosis but not mitosis?

Correct AnswerverifiedShow Answer

Which of the following statements describes the chromosomal makeup of each daughter cell after telophase of meiosis I?

Correct AnswerverifiedShow Answer

If a horticulturist breeding gardenias succeeds in having a single plant with a particularly desirable set of traits, which of the following would be her most probable and efficient route to establishing a line of such plants?

Correct AnswerverifiedShow Answer

Crossing over of chromosomes normally takes place during which of the following processes?

Correct AnswerverifiedB

Which of the following statements correctly describes a karyotype?

Correct AnswerverifiedShow Answer

Which of the following statements describes one characteristic of each chromosome in a cell during the entire process of meiosis I?

Correct AnswerverifiedShow Answer

Quaking aspen trees can send out underground stems for asexual reproduction. Sexual reproduction is not as common, but when it does happen, the haploid gametes have 19 chromosomes. How many chromosomes are in the cells of the underground stems?

Correct AnswerverifiedShow Answer

Which of the following processes occurs when homologous chromosomes cross over in meiosis I?

Correct AnswerverifiedShow Answer

How does natural selection apply to sexual reproduction as opposed to asexual reproduction?

Correct AnswerverifiedShow Answer

Many organisms spend most of their life cycle in the diploid state. If meiosis produces haploid cells, how is the diploid number restored for these types of organisms?

Correct AnswerverifiedShow Answer

At which stage of mitosis are chromosomes usually photographed in the preparation of a karyotype?

Correct AnswerverifiedShow Answer

Refer to the life cycles illustrated in the figure below to answer the following questions. -Which of the life cycles is typical for plants and some algae?

Correct AnswerverifiedShow Answer

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A

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C

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B

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