Question 1

In prophase I of spermatogenesis, there are ____ chromatids.

Accepted Answer

A)  92 
B)  23 
C)  46 
D)  half as many (as in somatic cells) 
E)  twice as many (as compared to mature sperm) 
A)  92 
B)  23 
C)  46 
D)  half as many (as in somatic cells) 
E)  twice as many (as compared to mature sperm)

Question 2

Ionizing radiation that can harm living cells does so by

Accepted Answer

A)  creating chemical compounds. 
B)  lysing lysosomes. 
C)  removing electrons from atoms to create positive ions. 
D)  creating buffers. 
E)  destroying buffers. 
A)  creating chemical compounds. 
B)  lysing lysosomes. 
C)  removing electrons from atoms to create positive ions. 
D)  creating buffers. 
E)  destroying buffers.

Question 3

Different, or alternative, forms of the same gene are called

Accepted Answer

A)  genetomorphs. 
B)  alleles. 
C)  mutants. 
D)  chromatids. 
E)  homologous. 
A)  genetomorphs. 
B)  alleles. 
C)  mutants. 
D)  chromatids. 
E)  homologous.

Question 4

The mature ovum is produced by maturation of the

Accepted Answer

A)  oogonium. 
B)  primary oocyte. 
C)  secondary polar body. 
D)  primary polar body. 
E)  secondary oocyte. 
A)  oogonium. 
B)  primary oocyte. 
C)  secondary polar body. 
D)  primary polar body. 
E)  secondary oocyte.

Question 5

The chromosomes detach from one another and become visibly separated during

Accepted Answer

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

Question 6

The chromosomes are moving to opposite poles during

Accepted Answer

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

Question 7

The essence of meiosis is that

Accepted Answer

A)  gametes are formed that receive one copy of each member of each pair of homologous chromosomes. 
B)  gametes are formed that are diploid. 
C)  each gamete receives one member of each pair of homologous chromosomes. 
D)  gametes are formed that are haploid. 
E)  each gamete receives one member of each pair of homologous chromosomes, and gametes are formed that are haploid. 
A)  gametes are formed that receive one copy of each member of each pair of homologous chromosomes. 
B)  gametes are formed that are diploid. 
C)  each gamete receives one member of each pair of homologous chromosomes. 
D)  gametes are formed that are haploid. 
E)  each gamete receives one member of each pair of homologous chromosomes, and gametes are formed that are haploid.

Question 8

Chromosome pairs numbered 1 through 22 are classified as

Accepted Answer

A)  centrosomes. 
B)  somatosomes. 
C)  sex chromosomes. 
D)  autosomes. 
E)  corposomes. 
A)  centrosomes. 
B)  somatosomes. 
C)  sex chromosomes. 
D)  autosomes. 
E)  corposomes.

Question 9

Chromosomes of a pair of homologous chromosomes may differ from other chromosomes in terms of

Accepted Answer

A)  size. 
B)  shape. 
C)  alleles they carry. 
D)  position of the centromere. 
E)  all of these. 
A)  size. 
B)  shape. 
C)  alleles they carry. 
D)  position of the centromere. 
E)  all of these.

Question 10

Selecting the Exception Four of the five answers listed below are related by a common phase of mitosis. Select the exception.

Accepted Answer

A)  chromosomes decondense 
B)  spindle microtubules disappear 
C)  nucleolus reappears 
D)  chromosomes separate 
E)  nuclear envelope reforms 
A)  chromosomes decondense 
B)  spindle microtubules disappear 
C)  nucleolus reappears 
D)  chromosomes separate 
E)  nuclear envelope reforms

Question 11

Which statement is true of homologous chromosomes?

Accepted Answer

A)  They are of unequal length. 
B)  Each gamete receives one member of each pair. 
C)  There are 46 pairs in humans. 
D)  They are identical in every way. 
E)  They include all chromosomes except X and Y. 
A)  They are of unequal length. 
B)  Each gamete receives one member of each pair. 
C)  There are 46 pairs in humans. 
D)  They are identical in every way. 
E)  They include all chromosomes except X and Y.

Question 12

Which of the following cells is NOT haploid?

Accepted Answer

A)  secondary spermatocyte 
B)  sperm 
C)  primary oocyte 
D)  spermatids 
E)  polar bodies 
A)  secondary spermatocyte 
B)  sperm 
C)  primary oocyte 
D)  spermatids 
E)  polar bodies

Question 13

The diploid number of chromosomes found in a eukaryotic cell

Accepted Answer

A)  indicates the phylogenetic position of the organism. 
B)  is constant during the life cycle. 
C)  is haploid among asexually reproducers and diploid if they reproduce sexually. 
D)  is cut in half by meiosis and is restored by fertilization. 
E)  is dependent on the age of the tissue. 
A)  indicates the phylogenetic position of the organism. 
B)  is constant during the life cycle. 
C)  is haploid among asexually reproducers and diploid if they reproduce sexually. 
D)  is cut in half by meiosis and is restored by fertilization. 
E)  is dependent on the age of the tissue.

Question 14

Match between columns
                        Premises: Condensation and shortening of chromosomes occurs during this phase.
Spindle fibers first appear during this stage.
During this stage, homologous pairs of chromosomes are lined up on the equatorial plate.
DNA replicates during this phase.
Cytokinesis occurs as this phase of mitosis proceeds.
The microtubular spindle develops during this phase.
During this phase, the centromeres break apart as the separated sister chromatids begin to move to opposite poles.
Genes replicate during this phase.
Chromosomes replicate during this phase.
New daughter nuclear membranes form during this phase.
Sister chromatids joined at their centromeres are attached to spindle fibers during this phase.

Accepted Answer

The Answer of interphase . and metaphase and prophase . is...

Question 15

Selecting the Exception Four of the five answers listed below are related by a common phase of mitosis. Select the exception.

Accepted Answer

A)  chromosomes align at the spindle equator 
B)  sister chromatids become individual chromosomes 
C)  centromeres divide 
D)  the chromosomes move apart 
E)  spindle microtubules shorten, pulling chromosomes toward the poles 
A)  chromosomes align at the spindle equator 
B)  sister chromatids become individual chromosomes 
C)  centromeres divide 
D)  the chromosomes move apart 
E)  spindle microtubules shorten, pulling chromosomes toward the poles

Question 16

During the "gap" phases of the cell cycle, most of the activity is directed toward

Accepted Answer

A)  DNA replication. 
B)  nuclear membrane synthesis. 
C)  resting for the next step. 
D)  sorting the chromosomes. 
E)  processes required for cell division. 
A)  DNA replication. 
B)  nuclear membrane synthesis. 
C)  resting for the next step. 
D)  sorting the chromosomes. 
E)  processes required for cell division.

Question 17

Homologous chromosomes may swap segments of genetic information during which phase of meiosis?

Accepted Answer

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

Question 18

The distribution of cytoplasm to daughter cells is accomplished during

Accepted Answer

A)  prokaryotic fission. 
B)  mitosis. 
C)  meiosis. 
D)  cytokinesis. 
E)  karyokinesis. 
A)  prokaryotic fission. 
B)  mitosis. 
C)  meiosis. 
D)  cytokinesis. 
E)  karyokinesis.

Question 19

Major gene reshuffling takes place during

Accepted Answer

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

Question 20

Which does NOT occur in prophase I of meiosis?

Accepted Answer

A)  cytokinesis 
B)  formation of groups of four chromatids 
C)  homologue pairing 
D)  crossing over 
E)  condensation of chromatin 
A)  cytokinesis 
B)  formation of groups of four chromatids 
C)  homologue pairing 
D)  crossing over 
E)  condensation of chromatin

Exam 18: Cell Reproduction

In prophase I of spermatogenesis, there are ____ chromatids.

Ionizing radiation that can harm living cells does so by

Different, or alternative, forms of the same gene are called

The mature ovum is produced by maturation of the

The chromosomes detach from one another and become visibly separated during

The chromosomes are moving to opposite poles during

The essence of meiosis is that

Chromosome pairs numbered 1 through 22 are classified as

Chromosomes of a pair of homologous chromosomes may differ from other chromosomes in terms of

Selecting the Exception Four of the five answers listed below are related by a common phase of mitosis. Select the exception.

Which statement is true of homologous chromosomes?

Which of the following cells is NOT haploid?

The diploid number of chromosomes found in a eukaryotic cell

Selecting the Exception Four of the five answers listed below are related by a common phase of mitosis. Select the exception.

During the "gap" phases of the cell cycle, most of the activity is directed toward

Homologous chromosomes may swap segments of genetic information during which phase of meiosis?

The distribution of cytoplasm to daughter cells is accomplished during

Major gene reshuffling takes place during

Which does NOT occur in prophase I of meiosis?

Learning About Human Biology

Chemistry of Life

Cells and How They Work

Tissues, Organs, and Organ Systems

The Skeletal System

The Muscular System

Circulation: the Heart and Blood Vessels

Blood

Immunity and Disease

The Respiratory System

Digestion and Nutrition

The Urinary System

The Nervous System

Sensory Systems

The Endocrine System

Reproductive Systems

Development and Aging

Introduction to Genetics

Chromosomes and Human Genetics

DNA, Genes, and Biotechnology

Genes and Disease: Cancer

Principles of Evolution

Principles of Ecology

Human Impacts on the Biosphere

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