Question 1

Homologous chromosomes ____.

Accepted Answer

A)  are found in somatic cells and gametes 
B)  align along the equatorial plane during metaphase II 
C)  are replicated during interkinesis 
D)  contain a maternal and paternal chromosome 
E)  are preserved in each daughter cell produced by meiosis 
A)  are found in somatic cells and gametes 
B)  align along the equatorial plane during metaphase II 
C)  are replicated during interkinesis 
D)  contain a maternal and paternal chromosome 
E)  are preserved in each daughter cell produced by meiosis D

Question 2

Meiosis produces ____.

Accepted Answer

A)  four haploid cells 
B)  two diploid cells 
C)  two diploid cells and two haploid cells 
D)  four diploid cells 
E)  one haploid and three diploid cells 
A)  four haploid cells 
B)  two diploid cells 
C)  two diploid cells and two haploid cells 
D)  four diploid cells 
E)  one haploid and three diploid cells A

Question 3

During telophase I, ____.

Accepted Answer

A)  chromosomes condense 
B)  chromosomes align along the equatorial plane of the cell 
C)  nuclear envelopes form in some species, but not in others 
D)  homologous chromosomes separate 
E)  tetrads form 
A)  chromosomes condense 
B)  chromosomes align along the equatorial plane of the cell 
C)  nuclear envelopes form in some species, but not in others 
D)  homologous chromosomes separate 
E)  tetrads form C

Question 4

What is the difference between sister chromatids before and after anaphase II?

Accepted Answer

A)  Before anaphase II, the sister chromatids are separate; after anaphase II, the sister chromatids join and form a chromosome. 
B)  Before anaphase II, the sister chromatids form a single chromosome; after anaphase II, each sister chromatid is an individual chromosome. 
C)  Before anaphase II, each sister chromatid is an individual chromosome; after anaphase II, the sister chromatids form a single chromosome. 
D)  Before anaphase II, the sister chromatids form a single chromosome; after anaphase II, the sister chromatids become homologous chromosomes. 
E)  There is no difference; they are still together as a single chromosome. 
A)  Before anaphase II, the sister chromatids are separate; after anaphase II, the sister chromatids join and form a chromosome. 
B)  Before anaphase II, the sister chromatids form a single chromosome; after anaphase II, each sister chromatid is an individual chromosome. 
C)  Before anaphase II, each sister chromatid is an individual chromosome; after anaphase II, the sister chromatids form a single chromosome. 
D)  Before anaphase II, the sister chromatids form a single chromosome; after anaphase II, the sister chromatids become homologous chromosomes. 
E)  There is no difference; they are still together as a single chromosome.

Question 5

Which statement most accurately describes plant gametes?

Accepted Answer

A)  Gametophytes produced by mitotic divisions of spores can mature into gametes. 
B)  Gametes are formed directly from meiosis. 
C)  Haploid spores produced by meiosis are mature gametes. 
D)  Gametophytes produced directly from meiosis are mature gametes. 
E)  Sporophytes undergo meiosis to produce mature gametes called spores. 
A)  Gametophytes produced by mitotic divisions of spores can mature into gametes. 
B)  Gametes are formed directly from meiosis. 
C)  Haploid spores produced by meiosis are mature gametes. 
D)  Gametophytes produced directly from meiosis are mature gametes. 
E)  Sporophytes undergo meiosis to produce mature gametes called spores.

Question 6

Sex chromosomes are ____.

Accepted Answer

A)  completely different between the two sexes 
B)  partially homologous, but also have unique regions 
C)  found only in males 
D)  unable to line up properly at the metaphase plate 
E)  completely homologous, but always have different alleles 
A)  completely different between the two sexes 
B)  partially homologous, but also have unique regions 
C)  found only in males 
D)  unable to line up properly at the metaphase plate 
E)  completely homologous, but always have different alleles

Question 7

The formation of gametes is called ____.

Accepted Answer

A)  gametogenesis 
B)  mitosis 
C)  gametosis 
D)  fertilization 
E)  reproduction 
A)  gametogenesis 
B)  mitosis 
C)  gametosis 
D)  fertilization 
E)  reproduction

Question 8

Which pattern of diploid and haploid phases reflects the life cycle in plants?

Accepted Answer

A)  alternation between haploid and diploid generations 
B)  two haploid generations followed by a diploid generation 
C)  one haploid generation followed by two diploid generations 
D)  a single generation that limits the haploid state to gametes, while the rest of the organism is diploid 
E)  a single generation that limits the diploid state to gametes, while the rest of the organism is haploid 
A)  alternation between haploid and diploid generations 
B)  two haploid generations followed by a diploid generation 
C)  one haploid generation followed by two diploid generations 
D)  a single generation that limits the haploid state to gametes, while the rest of the organism is diploid 
E)  a single generation that limits the diploid state to gametes, while the rest of the organism is haploid

Question 9

Explain the purpose of meiosis.

Accepted Answer

Meiosis is a process that reduces the ch

Question 10

What is the name of the period of time that separates meiosis I and meiosis II?

Accepted Answer

A)  telophase II 
B)  interkinesis 
C)  prophase II 
D)  interphase 
E)  telophase I 
A)  telophase II 
B)  interkinesis 
C)  prophase II 
D)  interphase 
E)  telophase I

Question 11

For humans, which parent's gamete will determine the sex of the child?

Accepted Answer

A)  The father, because his gametes only contain the Y chromosome. 
B)  The mother, because her gametes only contain the X chromosome. 
C)  The father, because his gametes can contain either the X or the Y chromosome. 
D)  The mother, because her gametes can contain either the X or the Y chromosome. 
E)  Either parent, because the random mixing of gametes determines the sex of the child. 
A)  The father, because his gametes only contain the Y chromosome. 
B)  The mother, because her gametes only contain the X chromosome. 
C)  The father, because his gametes can contain either the X or the Y chromosome. 
D)  The mother, because her gametes can contain either the X or the Y chromosome. 
E)  Either parent, because the random mixing of gametes determines the sex of the child.

Question 12

In plants, the gametes produced by a particular gametophyte are ____.

Accepted Answer

A)  always identical because they result from meiosis 
B)  always identical because they result from mitosis 
C)  sometimes identical because they result from meiosis 
D)  sometimes identical because they result from mitosis 
E)  never identical because they result from meiosis 
A)  always identical because they result from meiosis 
B)  always identical because they result from mitosis 
C)  sometimes identical because they result from meiosis 
D)  sometimes identical because they result from mitosis 
E)  never identical because they result from meiosis

Question 13

Crossing-over ____.

Accepted Answer

A)  only takes place towards the middle of chromatids 
B)  can only occur once for each non-sister chromatid 
C)  can only occur once for each homologous chromosome pair 
D)  only takes place between sister chromatids 
E)  can occur at multiple sites in each set of paired chromosomes 
A)  only takes place towards the middle of chromatids 
B)  can only occur once for each non-sister chromatid 
C)  can only occur once for each homologous chromosome pair 
D)  only takes place between sister chromatids 
E)  can occur at multiple sites in each set of paired chromosomes

Question 14

How do the haploid and diploid phases of the plant life cycle differ from those of the animal life cycle?

Accepted Answer

A)  In plants, the diploid phase dominates the life cycle, while in animals the haploid phase dominates the life cycle. 
B)  In plants, mitosis occurs only during the haploid phase, while in animals mitosis occurs only during the diploid phase. 
C)  In plants, mitosis occurs only during the diploid phase, while in animals mitosis occurs only during the haploid phase. 
D)  In plants, mitosis occurs during both the haploid and diploid phases, while in animals mitosis occurs only during the diploid phase. 
E)  In plants, meiosis occurs during the haploid phase, while in animals meiosis occurs during the diploid phase. 
A)  In plants, the diploid phase dominates the life cycle, while in animals the haploid phase dominates the life cycle. 
B)  In plants, mitosis occurs only during the haploid phase, while in animals mitosis occurs only during the diploid phase. 
C)  In plants, mitosis occurs only during the diploid phase, while in animals mitosis occurs only during the haploid phase. 
D)  In plants, mitosis occurs during both the haploid and diploid phases, while in animals mitosis occurs only during the diploid phase. 
E)  In plants, meiosis occurs during the haploid phase, while in animals meiosis occurs during the diploid phase.

Question 15

Which pattern of diploid and haploid phases reflects the life cycle in some fungi and algae, but not plants or animals?

Accepted Answer

A)  alternation between haploid and diploid generations 
B)  two haploid generations followed by a diploid generation 
C)  one haploid generation followed by two diploid generations 
D)  a life cycle that limits the diploid state to a single cell produced by fertilization 
E)  a life cycle that limits the haploid state to a single cell that is immediately fertilized 
A)  alternation between haploid and diploid generations 
B)  two haploid generations followed by a diploid generation 
C)  one haploid generation followed by two diploid generations 
D)  a life cycle that limits the diploid state to a single cell produced by fertilization 
E)  a life cycle that limits the haploid state to a single cell that is immediately fertilized

Question 16

The chromosome number is halved by ____ and restored by ____.

Accepted Answer

A)  independent assortment; meiosis 
B)  mitosis; meiosis 
C)  meiosis; mitosis 
D)  meiosis; fertilization 
E)  mitosis; fertilization 
A)  independent assortment; meiosis 
B)  mitosis; meiosis 
C)  meiosis; mitosis 
D)  meiosis; fertilization 
E)  mitosis; fertilization

Question 17

During prophase I of meiosis, each chromosome consists of ____.

Accepted Answer

A)  one single-stranded DNA molecule 
B)  two sister chromatids 
C)  one sister chromatid 
D)  four sister chromatids 
E)  one double-stranded DNA molecule 
A)  one single-stranded DNA molecule 
B)  two sister chromatids 
C)  one sister chromatid 
D)  four sister chromatids 
E)  one double-stranded DNA molecule

Question 18

Which stage of meiosis is characterized by DNA condensation into compact chromosomes?

Accepted Answer

A)  prometaphase II 
B)  anaphase I 
C)  prophase II 
D)  prometaphase I 
E)  metaphase I 
A)  prometaphase II 
B)  anaphase I 
C)  prophase II 
D)  prometaphase I 
E)  metaphase I

Question 19

What is the main difference between the haploid and diploid phases of animal and plant life cycles?

Accepted Answer

In animals, the diploid phase

Question 20

DNA replication occurs ____.

Accepted Answer

A)  during interphase before meiosis 
B)  during prophase I of meiosis 
C)  during prophase II of meiosis 
D)  between meiosis I and meiosis II 
E)  during interkinesis 
A)  during interphase before meiosis 
B)  during prophase I of meiosis 
C)  during prophase II of meiosis 
D)  between meiosis I and meiosis II 
E)  during interkinesis

Exam 11: Meiosis: the Cellular Basis of Sexual Reproduction

Homologous chromosomes ____.

Meiosis produces ____.

During telophase I, ____.

What is the difference between sister chromatids before and after anaphase II?

Which statement most accurately describes plant gametes?

Sex chromosomes are ____.

The formation of gametes is called ____.

Which pattern of diploid and haploid phases reflects the life cycle in plants?

Explain the purpose of meiosis.

What is the name of the period of time that separates meiosis I and meiosis II?

For humans, which parent's gamete will determine the sex of the child?

In plants, the gametes produced by a particular gametophyte are ____.

Crossing-over ____.

How do the haploid and diploid phases of the plant life cycle differ from those of the animal life cycle?

Which pattern of diploid and haploid phases reflects the life cycle in some fungi and algae, but not plants or animals?

The chromosome number is halved by ____ and restored by ____.

During prophase I of meiosis, each chromosome consists of ____.

Which stage of meiosis is characterized by DNA condensation into compact chromosomes?

What is the main difference between the haploid and diploid phases of animal and plant life cycles?

DNA replication occurs ____.

Introduction to Biological Concepts and Research

Life, Chemistry, and Water

Biological Molecules: the Carbon Compounds of Life

Cells

Membranes and Transport

Energy, Enzymes, and Biological Reactions

Cellular Respiration: Harvesting Chemical Energy

Photosynthesis

Cell Communication

Cell Division and Mitosis

Mendel, Genes, and Inheritance

Genes, Chromosomes, and Human Genetics

Dna Structure, Replication, and Organization

Gene Expression: From Dna to Protein

Regulation of Gene Expression

Bacterial and Viral Genetics

Dna Technology: Making and Using Genetically Altered Organisms, and Other Applications

Genomes and Proteomes

The Development of Evolutionary Thought

Microevolution: Genetic Changes Within Populations

Speciation

Paleobiology and Macroevolution

Systematic Biology: Phylogeny and Classification

The Origin of Life

Prokaryotes and Viruses

Protists

Seedless Plants

Seed Plants

Fungi

Animal Phylogeny, Acoelomates, and Protostomes

Deuterostomes: Vertebrates and Their Closest Relatives

The Plant Body

Transport in Plants

Plant Nutrition

Reproduction and Development in Flowering Plants

Plant Signals and Responses to the Environment

Introduction to Animal Organization and Physiology

Information Flow and the Neuron

Nervous Systems

Sensory Systems

The Endocrine System

Muscles, Bones, and Body Movements

The Circulatory System

Defenses Against Disease

Gas Exchange: the Respiratory System

Digestive Systems and Animal Nutrition

Regulating the Internal Environment: Osmoregulation, Excretion, and Thermoregulation

Animal Reproduction

Animal Development

Ecology and the Biosphere

Population Ecology

Population Interactions and Community Ecology

Ecosystems

Biodiversity and Conservation Biology

Animal Behavior

Filters

The chromosome number is halved by and restored by .