Question 1

Referring to a plant's sexual life cycle, which of the following terms describes the process that leads directly to the formation of gametes?

Accepted Answer

A) sporophyte meiosis 
B) gametophyte mitosis 
C) gametophyte meiosis 
D) sporophyte mitosis 
E) alternation of generations 
A) sporophyte meiosis 
B) gametophyte mitosis 
C) gametophyte meiosis 
D) sporophyte mitosis 
E) alternation of generations

Question 2

If the DNA content of a diploid cell in the G₁ phase of the cell cycle is x, then the DNA content of the same cell at metaphase of meiosis I would be

Accepted Answer

A) 0.25x. 
B) 0.5x. 
C) x. 
D) 2x. 
E) 4x. 
A) 0.25x. 
B) 0.5x. 
C) x. 
D) 2x. 
E) 4x.

Question 3

A certain gene found in a diploid species is known to have 18 alleles (variants). Any given organism of that species can/must have which of the following?

Accepted Answer

A) 2 alleles for that gene 
B) up to 18 chromosomes with that gene 
C) up to 18 genes for that trait 
D) a haploid number of 9 chromosomes 
E) up to, but not more than, 18 different traits 
A) 2 alleles for that gene 
B) up to 18 chromosomes with that gene 
C) up to 18 genes for that trait 
D) a haploid number of 9 chromosomes 
E) up to, but not more than, 18 different traits

Question 4

Use the following information to answer the questions below.
A species of lizard has been discovered that reproduces asexually.
-Upon further investigation, there appears to be a few males in the population. This suggests that

Accepted Answer

A) the environment is very stable. 
B) sexual reproduction may occur occasionally. 
C) this is a diploid population. 
D) there are no sex linked chromosomes in the species. 
E) the males must breed with a neighbouring species. 
A) the environment is very stable. 
B) sexual reproduction may occur occasionally. 
C) this is a diploid population. 
D) there are no sex linked chromosomes in the species. 
E) the males must breed with a neighbouring species.

Question 5

Use the following information to answer the questions below.
A species of lizard has been discovered that reproduces asexually.
-What type of habitat would you expect to find it in?

Accepted Answer

A) aquatic 
B) one with seasonal variation 
C) desert 
D) stable 
E) unstable 
A) aquatic 
B) one with seasonal variation 
C) desert 
D) stable 
E) unstable

Question 6

The multicellular, diploid phase in a plant life cycle is known as the

Accepted Answer

A) gametophyte. 
B) sporophyte. 
C) zygote. 
D) dispersal stage. 
E) F1 generation. 
A) gametophyte. 
B) sporophyte. 
C) zygote. 
D) dispersal stage. 
E) F1 generation.

Question 7

The following question refers to the essential steps in meiosis described below.
1. Formation of four new nuclei, each with half the chromosomes present in the parental nucleus
2. Alignment of tetrads at the metaphase plate
3. Separation of sister chromatids
4. Separation of the homologues; no uncoupling of the centromere
5. Synapsis; chromosomes moving to the middle of the cell in pairs
-For a species with a haploid number of 23 chromosomes, how many different combinations of maternal and paternal chromosomes are possible for the gametes?

Accepted Answer

A) 23 
B) 46 
C) 460 
D) 920 
E) about 8 million 
A) 23 
B) 46 
C) 460 
D) 920 
E) about 8 million

Question 8

Refer to the life cycles illustrated in the figure below to answer the following questions.
  
-In part III of the above figure, the progression of events corresponds to which of the following series?

Accepted Answer

A) zygote, mitosis, gametophyte, mitosis, fertilization, zygote, mitosis 
B) sporophyte, meiosis, spore, mitosis, gametophyte, mitosis, gametes, fertilization 
C) fertilization, mitosis, multicellular haploid, mitosis, spores, sporophyte 
D) gametophyte, meiosis, zygote, spores, sporophyte, zygote 
E) meiosis, fertilization, zygote, mitosis, adult, meiosis 
A) zygote, mitosis, gametophyte, mitosis, fertilization, zygote, mitosis 
B) sporophyte, meiosis, spore, mitosis, gametophyte, mitosis, gametes, fertilization 
C) fertilization, mitosis, multicellular haploid, mitosis, spores, sporophyte 
D) gametophyte, meiosis, zygote, spores, sporophyte, zygote 
E) meiosis, fertilization, zygote, mitosis, adult, meiosis

Question 9

Which of the following happens at the conclusion of meiosis I?

Accepted Answer

A) Homologous chromosomes are separated. 
B) The chromosome number per cell is conserved. 
C) Sister chromatids are separated. 
D) Four daughter cells are formed. 
E) The sperm cells elongate to form a head and a tail end. 
A) Homologous chromosomes are separated. 
B) The chromosome number per cell is conserved. 
C) Sister chromatids are separated. 
D) Four daughter cells are formed. 
E) The sperm cells elongate to form a head and a tail end.

Question 10

A human cell containing 22 autosomes and a Y chromosome is

Accepted Answer

A) a sperm. 
B) an egg. 
C) a zygote. 
D) a somatic cell of a male. 
E) a somatic cell of a female. 
A) a sperm. 
B) an egg. 
C) a zygote. 
D) a somatic cell of a male. 
E) a somatic cell of a female.

Question 11

Which of the following occurs in meiosis but not in mitosis?

Accepted Answer

A) chromosome replication 
B) synapsis of chromosomes 
C) production of daughter cells 
D) alignment of chromosomes at the equator 
E) condensation of chromatin 
A) chromosome replication 
B) synapsis of chromosomes 
C) production of daughter cells 
D) alignment of chromosomes at the equator 
E) condensation of chromatin

Question 12

A tetrad includes which of the following sets of DNA strands?

Accepted Answer

A) two single-stranded chromosomes that have synapsed 
B) two sets of sister chromatids that have synapsed 
C) four sets of sister chromatids 
D) four sets of unique chromosomes 
E) eight sets of sister chromatids 
A) two single-stranded chromosomes that have synapsed 
B) two sets of sister chromatids that have synapsed 
C) four sets of sister chromatids 
D) four sets of unique chromosomes 
E) eight sets of sister chromatids

Question 13

For the following questions, match the key event of meiosis with the stages listed below.
I. Prophase I V. Prophase II
II. Metaphase I VI. Metaphase II
III. Anaphase I VII. Anaphase II
IV. Telophase I VIII. Telophase II
-Centromeres of sister chromatids disjoin and chromatids separate.

Accepted Answer

A) II 
B) III 
C) IV 
D) V 
E) VII 
A) II 
B) III 
C) IV 
D) V 
E) VII

Question 14

A given organism has 46 chromosomes in its karyotype. We can therefore conclude which of the following?

Accepted Answer

A) It must be human. 
B) It must be a primate. 
C) It must be an animal. 
D) It must be sexually reproducing. 
E) Its gametes must have 23 chromosomes. 
A) It must be human. 
B) It must be a primate. 
C) It must be an animal. 
D) It must be sexually reproducing. 
E) Its gametes must have 23 chromosomes.

Question 15

If the DNA content of a diploid cell in the G₁ phase of the cell cycle is x, then the DNA content of a single cell at metaphase of meiosis II would be

Accepted Answer

A) 0.25x. 
B) 0.5x. 
C) x. 
D) 2x. 
E) 4x. 
A) 0.25x. 
B) 0.5x. 
C) x. 
D) 2x. 
E) 4x.

Question 16

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

Accepted Answer

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

Question 17

The transmission of traits from one generation to the next is called

Accepted Answer

A) inheritance. 
B) dominance. 
C) natural selection. 
D) Mendelian genetics. 
E) evolution. 
A) inheritance. 
B) dominance. 
C) natural selection. 
D) Mendelian genetics. 
E) evolution.

Question 18

Homologous chromosomes move toward opposite poles of a dividing cell during

Accepted Answer

A) mitosis. 
B) meiosis I. 
C) meiosis II. 
D) fertilization. 
E) binary fission. 
A) mitosis. 
B) meiosis I. 
C) meiosis II. 
D) fertilization. 
E) binary fission.

Question 19

When we see chiasmata under a microscope, that lets us know which of the following has occurred?

Accepted Answer

A) asexual reproduction 
B) meiosis II 
C) anaphase II 
D) prophase I 
E) separation of homologues 
A) asexual reproduction 
B) meiosis II 
C) anaphase II 
D) prophase I 
E) separation of homologues

Question 20

You have isolated DNA from cells in different stages of meiosis within one species. You have determined the relative DNA content for each type, and plotted the results on the graph shown below. Refer to the graph to answer the following questions.
  
-Which sample might represent an animal cell which is at the end of meisosi II?

Accepted Answer

A) I 
B) II 
C) III 
D) both I and II 
E) either II or III 
A) I 
B) II 
C) III 
D) both I and II 
E) either II or III

Exam 13: Meiosis and Sexual Life Cycles

Referring to a plant's sexual life cycle, which of the following terms describes the process that leads directly to the formation of gametes?

If the DNA content of a diploid cell in the G₁ phase of the cell cycle is x, then the DNA content of the same cell at metaphase of meiosis I would be

A certain gene found in a diploid species is known to have 18 alleles (variants). Any given organism of that species can/must have which of the following?

Use the following information to answer the questions below. A species of lizard has been discovered that reproduces asexually. -Upon further investigation, there appears to be a few males in the population. This suggests that

Use the following information to answer the questions below. A species of lizard has been discovered that reproduces asexually. -What type of habitat would you expect to find it in?

The multicellular, diploid phase in a plant life cycle is known as the

Refer to the life cycles illustrated in the figure below to answer the following questions. -In part III of the above figure, the progression of events corresponds to which of the following series?

Which of the following happens at the conclusion of meiosis I?

A human cell containing 22 autosomes and a Y chromosome is

Which of the following occurs in meiosis but not in mitosis?

A tetrad includes which of the following sets of DNA strands?

For the following questions, match the key event of meiosis with the stages listed below. I. Prophase I V. Prophase II II. Metaphase I VI. Metaphase II III. Anaphase I VII. Anaphase II IV. Telophase I VIII. Telophase II -Centromeres of sister chromatids disjoin and chromatids separate.

A given organism has 46 chromosomes in its karyotype. We can therefore conclude which of the following?

If the DNA content of a diploid cell in the G₁ phase of the cell cycle is x, then the DNA content of a single cell at metaphase of meiosis II would be

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

The transmission of traits from one generation to the next is called

Homologous chromosomes move toward opposite poles of a dividing cell during

When we see chiasmata under a microscope, that lets us know which of the following has occurred?

Introduction: Evolution and Themes of Biology

The Chemical Context of Life

Water and Life

Carbon and the Molecular Diversity of Life

The Structure and Function of Large Biological Molecules

A Tour of the Cell

Membrane Structure and Function

An Introduction to Metabolism

Cellular Respiration and Fermentation

Photosynthesis

Cell Communication

The Cell Cycle

Mendel and the Gene Idea

The Chromosomal Basis of Inheritance

The Molecular Basis of Inheritance

From Gene to Protein

Regulation of Gene Expression

Viruses

Dna Tools and Biotechnology

Genomes and Their Evolution

Descent With Modification: a Darwinian View of Life

The Evolution of Populations

The Origin of Species

The History of Life on Earth

Phylogeny and the Tree of Life

Bacteria and Archaea

Protists

Plant Diversity I: How Plants Colonized Land

Plant Diversity Ii: the Evolution of Seed Plants

Fungi

An Overview of Animal Diversity

An Introduction to Invertebrates

The Origin and Evolution of Vertebrates

Plant Structure, Growth, and Development

Resource Acquisition and Transport in Vascular Plants

Soil and Plant Nutrition

Angiosperm Reproduction and Biotechnology

Plant Responses to Internal and External Signals

Basic Principles of Animal Form and Function

Animal Nutrition

Circulation and Gas Exchange

The Immune System

Osmoregulation and Excretion

Hormones and the Endocrine System

Animal Reproduction

Animal Development

Neurons, Synapses, and Signalling

Nervous Systems

Sensory and Motor Mechanisms

Animal Behaviour

An Introduction to Ecology and the Biosphere

Population Ecology

Community Ecology

Ecosystems and Restoration Ecology

Conservation Biology and Global Change

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