Question 1

Chromosome segregation in anaphase I is consistent with which statement?

Accepted Answer

A)  ​The position where crossing over occurs is random. 
B)  ​The pole that any one chromosome moves toward is completely independent of the movement of the other 45 chromosomes in human cells. 
C)  ​Either partner of a homologous pair of chromosomes may end up at either spindle pole. 
D)  ​The sperm that fertilizes the egg is selected at random. 
E)  ​The number of crossing over events is random. 
A)  ​The position where crossing over occurs is random. 
B)  ​The pole that any one chromosome moves toward is completely independent of the movement of the other 45 chromosomes in human cells. 
C)  ​Either partner of a homologous pair of chromosomes may end up at either spindle pole. 
D)  ​The sperm that fertilizes the egg is selected at random. 
E)  ​The number of crossing over events is random.

Question 2

Crossing over​

Accepted Answer

A)  ​increases variability in gametes. 
B)  ​happens only once per homologue pair. 
C)  ​occurs between sister chromatids. 
D)  ​prevents genetic recombination. 
E)  ​is followed immediately by separation of the chromatids. 
A)  ​increases variability in gametes. 
B)  ​happens only once per homologue pair. 
C)  ​occurs between sister chromatids. 
D)  ​prevents genetic recombination. 
E)  ​is followed immediately by separation of the chromatids.

Question 3

The figure above represents

Accepted Answer

A)  ​individual genes from an asexual worm. 
B)  ​maternal chromosomes that are identical. 
C)  ​paternal chromosomes that are identical. 
D)  ​homologous chromosomes. 
E)  nonhomologous chromosomes.​ 
A)  ​individual genes from an asexual worm. 
B)  ​maternal chromosomes that are identical. 
C)  ​paternal chromosomes that are identical. 
D)  ​homologous chromosomes. 
E)  nonhomologous chromosomes.​

Question 4

Meiosis typically results in the production of

Accepted Answer

A)  ​two diploid cells. 
B)  ​four diploid cells. 
C)  ​four haploid cells. 
D)  ​two haploid cells. 
E)  ​one triploid cell. 
A)  ​two diploid cells. 
B)  ​four diploid cells. 
C)  ​four haploid cells. 
D)  ​two haploid cells. 
E)  ​one triploid cell.

Question 5

Sexual reproduction

Accepted Answer

A)  ​leads to uniform characteristics within a population. 
B)  ​results in new combinations of genetic traits. 
C)  ​creates genetic clones. 
D)  ​requires less tissue differentiation than asexual reproduction. 
E)  produces genetic clones and requires less tissue differentiation than asexual reproduction.​ 
A)  ​leads to uniform characteristics within a population. 
B)  ​results in new combinations of genetic traits. 
C)  ​creates genetic clones. 
D)  ​requires less tissue differentiation than asexual reproduction. 
E)  produces genetic clones and requires less tissue differentiation than asexual reproduction.​

Question 6

Which statement correctly describes human chromosomes?

Accepted Answer

A)  ​The haploid number is 22 
B)  ​Human gametes end up with two of each type of 23 chromosomes. 
C)  ​There are 42 pairs of chromosomes. 
D)  ​The diploid number is 46. 
E)  ​Human gametes end up with one of each type of 22 chromosomes. 
A)  ​The haploid number is 22 
B)  ​Human gametes end up with two of each type of 23 chromosomes. 
C)  ​There are 42 pairs of chromosomes. 
D)  ​The diploid number is 46. 
E)  ​Human gametes end up with one of each type of 22 chromosomes.

Question 7

Which of the following occur in telophase I of meiosis?​

Accepted Answer

A)  ​nuclear envelope formation 
B)  ​pairing of homologues 
C)  ​formation of a bipolar spindle 
D)  ​crossing over 
E)  condensation of chromosomes​ 
A)  ​nuclear envelope formation 
B)  ​pairing of homologues 
C)  ​formation of a bipolar spindle 
D)  ​crossing over 
E)  condensation of chromosomes​

Question 8

Duplicated chromosomes linked together at their centromeres at the beginning of meiosis are appropriately called what kind of chromatids?​

Accepted Answer

A)  ​mother 
B)  ​parallel 
C)  ​sister 
D)  ​homogenous 
E)  haploid​ 
A)  ​mother 
B)  ​parallel 
C)  ​sister 
D)  ​homogenous 
E)  haploid​

Question 9

In comparing mitosis and meiosis, which statement is true?

Accepted Answer

A)  ​Meiosis I is more like mitosis than is meiosis II. 
B)  ​Both processes result in four cells. 
C)  ​Pairing of homologues occurs in both. 
D)  ​Chromatids are present only in mitosis. 
E)  Meiosis II resembles mitosis.​ 
A)  ​Meiosis I is more like mitosis than is meiosis II. 
B)  ​Both processes result in four cells. 
C)  ​Pairing of homologues occurs in both. 
D)  ​Chromatids are present only in mitosis. 
E)  Meiosis II resembles mitosis.​

Question 10

What would happen if sister chromatids did not break apart during anaphase of mitosis?

Accepted Answer

Each duplicated chromosome wou

Question 11

Discuss the unique reproductive capacity of the bdelloid rotifer.

Accepted Answer

A newly discovered ability may help to e

Question 12

Which of the following is an advantage of sexual reproduction?​

Accepted Answer

A)  ​It prevents adaptation in a changing environment. 
B)  ​It eliminates the possibility of harmful traits being passed on. 
C)  ​It passes on half of a parent's genome. 
D)  ​It reduces genetic variation, which may be useful in the future. 
E)  ​It yields offspring with novel combinations of traits. 
A)  ​It prevents adaptation in a changing environment. 
B)  ​It eliminates the possibility of harmful traits being passed on. 
C)  ​It passes on half of a parent's genome. 
D)  ​It reduces genetic variation, which may be useful in the future. 
E)  ​It yields offspring with novel combinations of traits.

Question 13

Crossing over​

Accepted Answer

A)  occurs during mitosis. 
B)  ​involves centrioles. 
C)  ​involves breakages and exchanges between sister chromatids. 
D)  ​results in new combinations of alleles being channeled into the daughter cells. 
E)  only occurs in animal cells.​ 
A)  occurs during mitosis. 
B)  ​involves centrioles. 
C)  ​involves breakages and exchanges between sister chromatids. 
D)  ​results in new combinations of alleles being channeled into the daughter cells. 
E)  only occurs in animal cells.​

Question 14

At __________, the fusion of two gametes produces a(n) __________.

Accepted Answer

fertilizat

Question 15

Figure 12.7
  
-The accompanying illustration shows one possible outcome of the random alignment of homologous chromosomes at metaphase I. How many OTHER possible arrangements exist?

Accepted Answer

A)  ​none 
B)  ​one 
C)  ​two 
D)  seven 
E)  ​eight 
A)  ​none 
B)  ​one 
C)  ​two 
D)  seven 
E)  ​eight

Question 16

A diploid organism has ten homologous chromosome pairs. Disregarding crossing over, how many genetically different gametes are possible?

Accepted Answer

Each gamete will inherit one o

Question 17

Match the term to the correct description.​
-Spindle microtubules attach to each sister chromatid as the nuclear envelope breaks up.

Accepted Answer

A) ​prophase II 
B) ​metaphase I 
C) ​telophase II 
D) ​meoisis II 
A) ​prophase II 
B) ​metaphase I 
C) ​telophase II 
D) ​meoisis II

Question 18

During prophase II, ____.

Accepted Answer

A)  ​a new spindle forms 
B)  ​crossing over occurs 
C)  ​chromosomes are single-stranded 
D)  ​the cell is diploid 
E)  the nuclear envelope re-forms​ 
A)  ​a new spindle forms 
B)  ​crossing over occurs 
C)  ​chromosomes are single-stranded 
D)  ​the cell is diploid 
E)  the nuclear envelope re-forms​

Question 19

If a diploid organism has a genome consisting of four pairs of homologous chromosomes, it can produce ____ different combinations of maternal and paternal chromosomes in gametes (disregarding crossing over).

Accepted Answer

A)  ​4 
B)  ​8 
C)  ​12 
D)  ​16 
E)  ​32 
A)  ​4 
B)  ​8 
C)  ​12 
D)  ​16 
E)  ​32

Question 20

Fertilization of plant gametes produces a

Accepted Answer

A)  ​zygote. 
B)  ​gametophyte. 
C)  ​spore. 
D)  ​meiospore. 
E)  multicellular haploid plant.​ 
A)  ​zygote. 
B)  ​gametophyte. 
C)  ​spore. 
D)  ​meiospore. 
E)  multicellular haploid plant.​

Exam 12: Meiosis and Sexual Reproduction

Chromosome segregation in anaphase I is consistent with which statement?

Crossing over​

The figure above represents

Meiosis typically results in the production of

Sexual reproduction

Which statement correctly describes human chromosomes?

Which of the following occur in telophase I of meiosis?​

Duplicated chromosomes linked together at their centromeres at the beginning of meiosis are appropriately called what kind of chromatids?​

In comparing mitosis and meiosis, which statement is true?

What would happen if sister chromatids did not break apart during anaphase of mitosis?

Discuss the unique reproductive capacity of the bdelloid rotifer.

Which of the following is an advantage of sexual reproduction?​

Crossing over​

At __________, the fusion of two gametes produces a(n) __________.

Figure 12.7 -The accompanying illustration shows one possible outcome of the random alignment of homologous chromosomes at metaphase I. How many OTHER possible arrangements exist?

A diploid organism has ten homologous chromosome pairs. Disregarding crossing over, how many genetically different gametes are possible?

Match the term to the correct description.​ -Spindle microtubules attach to each sister chromatid as the nuclear envelope breaks up.

During prophase II, ____.

If a diploid organism has a genome consisting of four pairs of homologous chromosomes, it can produce ____ different combinations of maternal and paternal chromosomes in gametes (disregarding crossing over).

Fertilization of plant gametes produces a

Invitation to Biology

Lifes Chemical Basis

Molecules of Life

Cell Structure and Function

Ground Rules of Metabolism

Where It Starts - Photosynthesis

How Cells Release Chemical Energy

Dna Structure and Function

From Dna to Protein

Gene Control

How Cells Reproduce

Observing Patterns in Inherited Traits

Chromosomes and Human Inheritance

Studying and Manipulating Genomes

Evidence of Evolution

Processes of Evolution

Organizating Information About Species

Lifes Origin and Early Evolution

Viruses - Bacteria - and Archaea

Protists - the Simplest Eukaryotes

The Land Plants

Fungi

Animal Evolution - the Invertibrates

Animal Evolution - the Chordates

Human Evolution

Plant Tissues

Plant Nutrition and Transport

Life Cycles of Flowering Plants

Communication Strategies in Plants

Animal Tissues

Neural Control

Sensory Perception

Endocrine Control

Structural Support and Movement

Circulation

Immunity

Respiration

Digestion and Nutrition

Maintaining the Internal Environment

Animal Reproductive Systems

Animal Development

Animal Behavior

Filters

Crossing over

Which of the following occur in telophase I of meiosis?

Duplicated chromosomes linked together at their centromeres at the beginning of meiosis are appropriately called what kind of chromatids?

Which of the following is an advantage of sexual reproduction?

Crossing over

At , the fusion of two gametes produces a(n) .

Match the term to the correct description. -Spindle microtubules attach to each sister chromatid as the nuclear envelope breaks up.