Question 1

At thbeginning of prophasI therar__________ molecules of DNA in a developing human spercell.

Accepted Answer

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

Question 2

Sister chromatids arseparatefroeach other during __________ of meiosis.

Accepted Answer

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

Question 3

Homologous chromosomes

Accepted Answer

A) may exchange parts during meiosis. 
B) have alleles for the same characteristics even though the gene expression may not be the same. 
C) are in pairs, one chromosome of each pair from the father and one from the mother. 
D) pair up during meiosis. 
E) fit all of these descriptions. 
A) may exchange parts during meiosis. 
B) have alleles for the same characteristics even though the gene expression may not be the same. 
C) are in pairs, one chromosome of each pair from the father and one from the mother. 
D) pair up during meiosis. 
E) fit all of these descriptions.

Question 4

Four of thfivanswers listebelow arperiods of thsamcycle.Select thEXCEPTION.

Accepted Answer

A) G1 
B) M 
C) G2 
D) R 
E) S 
A) G1 
B) M 
C) G2 
D) R 
E) S

Question 5

In which of thfollowing stages does each chromosomconsist of two DNA molecules?
I.metaphase
II.telophase
III.prophase
IV.anaphase

Accepted Answer

A) III and IV 
B) I, III, and IV 
C) I and III 
D) I, II, and III 
E) I, II, III, and IV 
A) III and IV 
B) I, III, and IV 
C) I and III 
D) I, II, and III 
E) I, II, III, and IV

Question 6

Four of thfivanswers listebelow arrelateto thprocess of homologous pairing.Select thEXCEPTION.

Accepted Answer

A) genetic recombination 
B) increase in variability 
C) exchange of genes 
D) identical daughter cells 
E) chiasma 
A) genetic recombination 
B) increase in variability 
C) exchange of genes 
D) identical daughter cells 
E) chiasma

Question 7

Crossing over

Accepted Answer

A) generally results in pairing up and binary fission. 
B) involves nuclei. 
C) involves breakages and exchanges between sister chromatids. 
D) alters the composition of chromosomes and results in new combinations of alleles being channeled into the daughter cells. 
E) is true of all of these. 
A) generally results in pairing up and binary fission. 
B) involves nuclei. 
C) involves breakages and exchanges between sister chromatids. 
D) alters the composition of chromosomes and results in new combinations of alleles being channeled into the daughter cells. 
E) is true of all of these.

Question 8

Asexual reproduction

Accepted Answer

A) produces the events of meiosis. 
B) produces clones. 
C) is more like meiosis than mitosis. 
D) leads to increased variation in offspring. 
E) involves episodes of crossing over. 
A) produces the events of meiosis. 
B) produces clones. 
C) is more like meiosis than mitosis. 
D) leads to increased variation in offspring. 
E) involves episodes of crossing over.

Question 9

Four of thfivanswers listebelow arrelateby a common phasof mitosis.Select thEXCEPTION.

Accepted Answer

A) beginning of microtubule assembly outside the nucleus 
B) division of centromeres 
C) disappearance of nucleolus 
D) disappearance of nuclear membrane 
E) shortening and condensation of chromosomes make them more visible 
A) beginning of microtubule assembly outside the nucleus 
B) division of centromeres 
C) disappearance of nucleolus 
D) disappearance of nuclear membrane 
E) shortening and condensation of chromosomes make them more visible

Question 10

Four of thfivanswers listebelow arstages of actual nuclear division.Select thEXCEPTION.

Accepted Answer

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

Question 11

Animal cells dividby

Accepted Answer

A) budding. 
B) fusion. 
C) pinching. 
D) snapping. 
E) any of these. 
A) budding. 
B) fusion. 
C) pinching. 
D) snapping. 
E) any of these.

Question 12

-Which of thfollowing is thproper sequencfor mitosis?
I.metaphase
II.telophase
III.prophase
IV.anaphase

Accepted Answer

A) II, I, IV, III 
B) I, II, III, IV 
C) III, I, IV, II 
D) IV, III, II, I 
E) I, IV, II, III 
A) II, I, IV, III 
B) I, II, III, IV 
C) III, I, IV, II 
D) IV, III, II, I 
E) I, IV, II, III

Question 13

Under favorablconditions, during which phasof meiosis will thchromosomes appear as a packet of four chromatids?

Accepted Answer

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

Question 14

Cell lines allow researchers

Accepted Answer

A) to produce and purify useful proteins. 
B) to study cellular mechanisms. 
C) to study human diseases. 
D) to avoid experimentation on people. 
E) to do all of these. 
A) to produce and purify useful proteins. 
B) to study cellular mechanisms. 
C) to study human diseases. 
D) to avoid experimentation on people. 
E) to do all of these.

Question 15

During thS stage,

Accepted Answer

A) chromosomes become thick and compact. 
B) the cell is at rest. 
C) the cytoplasm starts separating its organelles. 
D) DNA is replicated. 
E) the cell prepares to divide. 
A) chromosomes become thick and compact. 
B) the cell is at rest. 
C) the cytoplasm starts separating its organelles. 
D) DNA is replicated. 
E) the cell prepares to divide.

Question 16

Crossing over is onof thmost important events in meiosis because

Accepted Answer

A) it produces new arrays of alleles on chromosomes. 
B) homologous chromosomes must be separated into different daughter cells. 
C) the number of chromosomes allotted to each daughter cell must be halved. 
D) homologous chromatids must be separated into different daughter cells. 
E) all of these are true. 
A) it produces new arrays of alleles on chromosomes. 
B) homologous chromosomes must be separated into different daughter cells. 
C) the number of chromosomes allotted to each daughter cell must be halved. 
D) homologous chromatids must be separated into different daughter cells. 
E) all of these are true.

Question 17

Cells with two of each kinof chromosomardescribeby thterm

Accepted Answer

A) polyploid. 
B) diploid. 
C) triploid. 
D) haploid. 
E) tetraploid. 
A) polyploid. 
B) diploid. 
C) triploid. 
D) haploid. 
E) tetraploid.

Question 18

A pintreis callea sporophytbecausit

Accepted Answer

A) develops from a germinated spore. 
B) produces spores by meiosis. 
C) is haploid. 
D) undergoes fertilization. 
E) reproduces by both sexual and asexual means. 
A) develops from a germinated spore. 
B) produces spores by meiosis. 
C) is haploid. 
D) undergoes fertilization. 
E) reproduces by both sexual and asexual means.

Question 19

Which of thfollowing is NOT correct about thcell cycle?

Accepted Answer

A) The cell cycle could be described as the events that occur from the time that a cell forms until the time it divides. 
B) During the cell cycle, DNA is replicated. 
C) The cell cycle consists of four phases. 
D) Cytoplasmic division is part of the cell cycle. 
E) All of these are NOT correct. 
A) The cell cycle could be described as the events that occur from the time that a cell forms until the time it divides. 
B) During the cell cycle, DNA is replicated. 
C) The cell cycle consists of four phases. 
D) Cytoplasmic division is part of the cell cycle. 
E) All of these are NOT correct.

Question 20

Which of thfollowing stages is (are) part of thinterphase?

Accepted Answer

A) G1 and G2 
B) S and G2 
C) G1and S 
D) G1, S, and G2 
E) none of these 
A) G1 and G2 
B) S and G2 
C) G1and S 
D) G1, S, and G2 
E) none of these

Exam 8: How Cells Reproduce

At thbeginning of prophasI therar__________ molecules of DNA in a developing human spercell.

Sister chromatids arseparatefroeach other during __________ of meiosis.

Homologous chromosomes

Four of thfivanswers listebelow arperiods of thsamcycle.Select thEXCEPTION.

In which of thfollowing stages does each chromosomconsist of two DNA molecules? I.metaphase II.telophase III.prophase IV.anaphase

Four of thfivanswers listebelow arrelateto thprocess of homologous pairing.Select thEXCEPTION.

Crossing over

Asexual reproduction

Four of thfivanswers listebelow arrelateby a common phasof mitosis.Select thEXCEPTION.

Four of thfivanswers listebelow arstages of actual nuclear division.Select thEXCEPTION.

Animal cells dividby

-Which of thfollowing is thproper sequencfor mitosis? I.metaphase II.telophase III.prophase IV.anaphase

Under favorablconditions, during which phasof meiosis will thchromosomes appear as a packet of four chromatids?

Cell lines allow researchers

During thS stage,

Crossing over is onof thmost important events in meiosis because

Cells with two of each kinof chromosomardescribeby thterm

A pintreis callea sporophytbecausit

Which of thfollowing is NOT correct about thcell cycle?

Which of thfollowing stages is (are) part of thinterphase?

Invitation to Biology

Molecules of Life

Cell Structure

Energy and Metabolism

Capturing and Releasing Energy

Dna Structure and Function

Gene Expression and Control

Patterns of Inheritance

Biotechnology

Evidence of Evolution

Processes of Evolution

Early Life Forms and the Viruses

Plants and Fungi

Animal Evolutionunit

Population Ecology

Communities and Ecosystems

The Biosphere and Human Eff Ects

Animal Tissues and Organs

How Animals Move

Circulation and Respiration

Immunity

Digestion and Excretion

Neural Control and the Senses

Endocrine Control

Reproduction and Development

Plant Form and Function

Plant Reproduction and Development

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