Question 1

Independent orientation of chromosomes at metaphase I and random fertilization are most like

Accepted Answer

A) shuffling cards and dealing out hands of poker. 
B) alphabetizing files in a filing cabinet. 
C) cutting up a pie into eight even- sized slices. 
D) pairing up similar socks after washing your clothes. 
A) shuffling cards and dealing out hands of poker. 
B) alphabetizing files in a filing cabinet. 
C) cutting up a pie into eight even- sized slices. 
D) pairing up similar socks after washing your clothes. A

Question 2

Which of the following shows the greatest promise as a cancer chemotherapy agent?

Accepted Answer

A) a drug that interferes with cellular respiration 
B) a drug that prevents crossing over 
C) a drug that prevents tetrad formation 
D) a drug that prevents mitotic spindle from forming 
A) a drug that interferes with cellular respiration 
B) a drug that prevents crossing over 
C) a drug that prevents tetrad formation 
D) a drug that prevents mitotic spindle from forming D

Question 3

Which of the following statements regarding the cell- cycle control system is false?

Accepted Answer

A) The cell- cycle control system receives messages from outside the cell that influence cell division. 
B) The cell- cycle control system operates independently of the growth factors. 
C) The cell- cycle control system includes three key checkpoints to complete a cell cycle. 
D) The cell- cycle control system triggers and controls major events in the cell cycle. 
A) The cell- cycle control system receives messages from outside the cell that influence cell division. 
B) The cell- cycle control system operates independently of the growth factors. 
C) The cell- cycle control system includes three key checkpoints to complete a cell cycle. 
D) The cell- cycle control system triggers and controls major events in the cell cycle. B

Question 4

Which of the following is a feature of plant cell division that distinguishes it from animal cell division?

Accepted Answer

A) formation of a cell plate 
B) formation of a cleavage furrow 
C) production of four (rather than two)new cells per mitotic division 
D) lack of cytokinesis 
A) formation of a cell plate 
B) formation of a cleavage furrow 
C) production of four (rather than two)new cells per mitotic division 
D) lack of cytokinesis

Question 5

Which of the following statements regarding sexual and asexual reproduction is true?

Accepted Answer

A) Cell division only occurs after sexual reproduction. 
B) Sexual reproduction typically includes the development of unfertilized eggs. 
C) Only offspring from asexual reproduction inherit traits from two parents. 
D) Sexual reproduction is more likely to increase genetic variation than is asexual reproduction. 
A) Cell division only occurs after sexual reproduction. 
B) Sexual reproduction typically includes the development of unfertilized eggs. 
C) Only offspring from asexual reproduction inherit traits from two parents. 
D) Sexual reproduction is more likely to increase genetic variation than is asexual reproduction.

Question 6

Which of the following types of organisms commonly demonstrates polyploidy?

Accepted Answer

A) mammals 
B) flowering plants 
C) fish 
D) reptiles 
A) mammals 
B) flowering plants 
C) fish 
D) reptiles

Question 7

During which stage of meiosis do synapsis and crossing over occur?

Accepted Answer

A) prophase II 
B) prophase I 
C) interphase I 
D) metaphase I 
A) prophase II 
B) prophase I 
C) interphase I 
D) metaphase I

Question 8

Which of the following is probably the main factor responsible for the phenomenon of density- dependent inhibition?

Accepted Answer

A) a local accumulation of growth- inhibiting factors 
B) cells' innate ability to "sense" when the organ of which they are a part has no need for additional cells 
C) physical contact of cell- surface proteins between adjacent cells. 
D) a local deficiency of nutrients 
A) a local accumulation of growth- inhibiting factors 
B) cells' innate ability to "sense" when the organ of which they are a part has no need for additional cells 
C) physical contact of cell- surface proteins between adjacent cells. 
D) a local deficiency of nutrients

Question 9

According to the graph,at what maternal age does the incidence of Down syndrome begin to increase substantially?

Accepted Answer

A) about 42 or 43 
B) about 31 or 32 
C) about 26 or 27 
D) about 37 or 38 
A) about 42 or 43 
B) about 31 or 32 
C) about 26 or 27 
D) about 37 or 38

Question 10

Which of the following statements about nondisjunction is false?

Accepted Answer

A) Nondisjunction in meiosis can affect autosomes and sex chromosomes. 
B) Women with a single X chromosome have Turner syndrome and are sterile. 
C) In general,a single Y chromosome is enough to produce "maleness." 
D) In mammals,extra copies of the Y chromosome are typically inactivated. 
A) Nondisjunction in meiosis can affect autosomes and sex chromosomes. 
B) Women with a single X chromosome have Turner syndrome and are sterile. 
C) In general,a single Y chromosome is enough to produce "maleness." 
D) In mammals,extra copies of the Y chromosome are typically inactivated.

Question 11

Asexual reproduction requires individual(s).

Accepted Answer

A) 0 
B) 2 
C) 1 
D) 3 
A) 0 
B) 2 
C) 1 
D) 3

Question 12

You are asked to culture an unidentified sample of animal tissue.You notice that the cells seem to fail to exhibit density- dependent inhibition.The source of this tissue sample is most likely

Accepted Answer

A) a cancer. 
B) a fetal liver. 
C) the sperm- producing tissue of the testis. 
D) skin. 
A) a cancer. 
B) a fetal liver. 
C) the sperm- producing tissue of the testis. 
D) skin.

Question 13

During which phase of mitosis does the nuclear envelope re- form?

Accepted Answer

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

Question 14

Which of the following statements regarding the function of mitosis is false?

Accepted Answer

A) Mitosis allows organisms to repair tissues. 
B) Mitosis allows organisms to reproduce asexually. 
C) Mitosis allows organisms to generate genetic diversity. 
D) Mitosis allows organisms to grow. 
A) Mitosis allows organisms to repair tissues. 
B) Mitosis allows organisms to reproduce asexually. 
C) Mitosis allows organisms to generate genetic diversity. 
D) Mitosis allows organisms to grow.

Question 15

Prior to mitosis,each chromosome of a eukaryotic cell consists of a pair of identical structures called

Accepted Answer

A) sister chromosomes. 
B) sister chromatids. 
C) nucleoli. 
D) chromatin. 
A) sister chromosomes. 
B) sister chromatids. 
C) nucleoli. 
D) chromatin.

Question 16

Which of the following helps maintain the structure of chromosomes and control the activity of genes?

Accepted Answer

A) proteins 
B) centromeres 
C) the nuclear membrane 
D) ribosomes 
A) proteins 
B) centromeres 
C) the nuclear membrane 
D) ribosomes

Question 17

Which of the following statements regarding cell division is false?

Accepted Answer

A) Cell division is necessary for development to occur. 
B) Cell division is common in eukaryotes but rare in prokaryotes. 
C) Cell division is the basis of both sexual and asexual reproduction. 
D) Cell division can reproduce an entire organism. 
A) Cell division is necessary for development to occur. 
B) Cell division is common in eukaryotes but rare in prokaryotes. 
C) Cell division is the basis of both sexual and asexual reproduction. 
D) Cell division can reproduce an entire organism.

Question 18

Which of the following features likely accounts for the difference between plant and animal cell cytokinesis?

Accepted Answer

A) Animal cells lack chloroplasts. 
B) Animal cells lack the microfilaments required for forming a cleavage furrow. 
C) Plant cells have cell walls. 
D) Plant cells have two sets of chromosomes; animal cells have one set of chromosomes. 
A) Animal cells lack chloroplasts. 
B) Animal cells lack the microfilaments required for forming a cleavage furrow. 
C) Plant cells have cell walls. 
D) Plant cells have two sets of chromosomes; animal cells have one set of chromosomes.

Question 19

Eukaryotic cells spend most of their cell cycle in which phase?

Accepted Answer

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

Question 20

At the start of mitotic anaphase,

Accepted Answer

A) the centromeres of each chromosome come apart. 
B) nuclear envelopes begin to form around the chromosomes. 
C) the chromatid DNA replicates. 
D) equivalent and complete collections of chromosomes have reached the two poles. 
A) the centromeres of each chromosome come apart. 
B) nuclear envelopes begin to form around the chromosomes. 
C) the chromatid DNA replicates. 
D) equivalent and complete collections of chromosomes have reached the two poles.

Exam 8: The Cellular Basis of Reproduction and Inheritance

Independent orientation of chromosomes at metaphase I and random fertilization are most like

Which of the following shows the greatest promise as a cancer chemotherapy agent?

Which of the following statements regarding the cell- cycle control system is false?

Which of the following is a feature of plant cell division that distinguishes it from animal cell division?

Which of the following statements regarding sexual and asexual reproduction is true?

Which of the following types of organisms commonly demonstrates polyploidy?

During which stage of meiosis do synapsis and crossing over occur?

Which of the following is probably the main factor responsible for the phenomenon of density- dependent inhibition?

According to the graph,at what maternal age does the incidence of Down syndrome begin to increase substantially?

Which of the following statements about nondisjunction is false?

Asexual reproduction requires individual(s).

You are asked to culture an unidentified sample of animal tissue.You notice that the cells seem to fail to exhibit density- dependent inhibition.The source of this tissue sample is most likely

During which phase of mitosis does the nuclear envelope re- form?

Which of the following statements regarding the function of mitosis is false?

Prior to mitosis,each chromosome of a eukaryotic cell consists of a pair of identical structures called

Which of the following helps maintain the structure of chromosomes and control the activity of genes?

Which of the following statements regarding cell division is false?

Which of the following features likely accounts for the difference between plant and animal cell cytokinesis?

Eukaryotic cells spend most of their cell cycle in which phase?

At the start of mitotic anaphase,

Biology: Exploring Life

The Chemical Basis of Life

The Molecules of Cells

A Tour of the Cell

The Working Cell

How Cells Harvest Chemical Energy

Photosynthesis: Using Light to Make Food

Patterns of Inheritance

Molecular Biology of the Gene

How Genes Are Controlled

Dna Technology and Genomics

How Populations Evolve

The Origin of Species

Tracing Evolutionary History

Microbial Life: Prokaryotes and Protists

The Evolution of Plant and Fungal Diversity

The Evolution of Invertebrate Diversity

The Evolution of Vertebrate Diversity

Unifying Concepts of Animal Structure and Function

Nutrition and Digestion

Gas Exchange

Circulation

The Immune System

Control of Body Temperature and Water Balance

Hormones and the Endocrine System

Reproduction and Embryonic Development

Nervous Systems

The Senses

How Animals Move

Plant Structure,growth,and Reproduction

Plant Nutrition and Transport

Control Systems in Plants

The Biosphere: an Introduction to Earths Diverse Environments

Behavioral Adaptations to the Environment

Population Ecology

Communities and Ecosystems

Conservation Biology

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