Question 1

The phase of mitosis during which the mitotic spindle begins to form is

Accepted Answer

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

Question 2

Eukaryotic chromosomes differ from prokaryotic chromosomes in that they

Accepted Answer

A) are simpler. 
B) are housed in a membrane- enclosed nucleus. 
C) include fewer proteins. 
D) are circular in structure. 
A) are simpler. 
B) are housed in a membrane- enclosed nucleus. 
C) include fewer proteins. 
D) are circular in structure.

Question 3

Which of the following statements regarding mitosis and meiosis is false?

Accepted Answer

A) All the events unique to meiosis occur during meiosis I. 
B) In mitosis,the chromosomes replicate only once in the preceding interphase. 
C) Mitosis provides for growth and tissue repair. 
D) Meiosis provides for asexual reproduction. 
A) All the events unique to meiosis occur during meiosis I. 
B) In mitosis,the chromosomes replicate only once in the preceding interphase. 
C) Mitosis provides for growth and tissue repair. 
D) Meiosis provides for asexual reproduction.

Question 4

If a chromosome fragment breaks off and then reattaches to the original chromosome,but in the reverse direction,the resulting chromosomal abnormality is called a(n)

Accepted Answer

A) inversion. 
B) deletion. 
C) translocation. 
D) reciprocal translocation. 
A) inversion. 
B) deletion. 
C) translocation. 
D) reciprocal translocation.

Question 5

Which of the following must occur for a plant or animal to grow and develop normally?

Accepted Answer

A) The organism must receive a supply of the appropriate hormones from its parents. 
B) Sufficient oxygen must be available to stimulate cell division. 
C) Sufficient light must be available to stimulate cell division. 
D) The organism must be able to control the timing and rate of cell division in different parts of its body. 
A) The organism must receive a supply of the appropriate hormones from its parents. 
B) Sufficient oxygen must be available to stimulate cell division. 
C) Sufficient light must be available to stimulate cell division. 
D) The organism must be able to control the timing and rate of cell division in different parts of its body.

Question 6

At a chiasma,two are attached to each other.

Accepted Answer

A) non- homologous chromosomes 
B) daughter cells 
C) homologous or sister chromatids 
D) homologous or non- sister chromatids 
A) non- homologous chromosomes 
B) daughter cells 
C) homologous or sister chromatids 
D) homologous or non- sister chromatids

Question 7

A pair of sex chromosomes found in a human male is most like

Accepted Answer

A) identical twins. 
B) a knife,fork,and spoon. 
C) a bride and groom. 
D) a pair of blue jeans. 
A) identical twins. 
B) a knife,fork,and spoon. 
C) a bride and groom. 
D) a pair of blue jeans.

Question 8

When animal cells are grown in a petri dish,they typically stop dividing once they have formed a single,unbroken layer on the bottom of the dish.This arrest of division is an example of

Accepted Answer

A) growth factor desensitization. 
B) density- dependent inhibition. 
C) cell constraint. 
D) cell division repression. 
A) growth factor desensitization. 
B) density- dependent inhibition. 
C) cell constraint. 
D) cell division repression.

Question 9

As a patch of scraped skin heals,the cells fill in the injured area but do not grow beyond that.This is an example of

Accepted Answer

A) density- dependent inhibition. 
B) density- independent inhibition. 
C) anchorage independence. 
D) growth factor inhibition. 
A) density- dependent inhibition. 
B) density- independent inhibition. 
C) anchorage independence. 
D) growth factor inhibition.

Question 10

Which of the following statements is false?

Accepted Answer

A) An X chromosome is an autosome. 
B) Gametes are haploid cells. 
C) Two haploid cells fuse during fertilization. 
D) A zygote is a fertilized egg. 
A) An X chromosome is an autosome. 
B) Gametes are haploid cells. 
C) Two haploid cells fuse during fertilization. 
D) A zygote is a fertilized egg.

Question 11

Sister chromatids are

Accepted Answer

A) joined together at a centromere. 
B) made only of DNA. 
C) unique to prokaryotes. 
D) found right after a cell divides. 
A) joined together at a centromere. 
B) made only of DNA. 
C) unique to prokaryotes. 
D) found right after a cell divides.

Question 12

Nondisjunction occurs when

Accepted Answer

A) two chromosomes fuse into one. 
B) a portion of a chromosome breaks off and is lost. 
C) members of a chromosome pair fail to separate. 
D) an entire pair of chromosomes is lost during meiosis I. 
A) two chromosomes fuse into one. 
B) a portion of a chromosome breaks off and is lost. 
C) members of a chromosome pair fail to separate. 
D) an entire pair of chromosomes is lost during meiosis I.

Question 13

Which of the following occurs during interphase?

Accepted Answer

A) separation of newly formed DNA to opposite ends of the cell 
B) a reduction in the size of the nuclear membrane 
C) cytokinesis 
D) cell growth and duplication of the chromosomes 
A) separation of newly formed DNA to opposite ends of the cell 
B) a reduction in the size of the nuclear membrane 
C) cytokinesis 
D) cell growth and duplication of the chromosomes

Question 14

What type of cell is shown?

Accepted Answer

A) animal cell in telophase 
B) plant cell in metaphase 
C) plant cell in telophase 
D) animal cell in metaphase 
A) animal cell in telophase 
B) plant cell in metaphase 
C) plant cell in telophase 
D) animal cell in metaphase

Question 15

Independent orientation of chromosomes at metaphase I results in an increase in the number of

Accepted Answer

A) sex chromosomes. 
B) possible combinations of characteristics. 
C) gametes. 
D) homologous chromosomes. 
A) sex chromosomes. 
B) possible combinations of characteristics. 
C) gametes. 
D) homologous chromosomes.

Question 16

Cancer is not usually inherited because

Accepted Answer

A) people with cancer usually die before reproducing. 
B) the chromosomal changes in cancer are usually confined to somatic cells. 
C) the cancerous cells usually interfere with the ability to produce gametes. 
D) the causes of cancer are not usually genetic. 
A) people with cancer usually die before reproducing. 
B) the chromosomal changes in cancer are usually confined to somatic cells. 
C) the cancerous cells usually interfere with the ability to produce gametes. 
D) the causes of cancer are not usually genetic.

Question 17

The genetic material is duplicated during

Accepted Answer

A) the mitotic phase. 
B) G2. 
C) G1. 
D) the S phase. 
A) the mitotic phase. 
B) G2. 
C) G1. 
D) the S phase.

Question 18

Which of the following statements regarding prokaryotes is false?

Accepted Answer

A) Prokaryotic cells are generally smaller and simpler than eukaryotic cells. 
B) In prokaryotes,daughter chromosomes are separated by an active movement away from each other and the growth of a new plasma membrane between them. 
C) Most prokaryotes reproduce by binary fission. 
D) Prokaryotic chromosomes are more complex than those of eukaryotes. 
A) Prokaryotic cells are generally smaller and simpler than eukaryotic cells. 
B) In prokaryotes,daughter chromosomes are separated by an active movement away from each other and the growth of a new plasma membrane between them. 
C) Most prokaryotes reproduce by binary fission. 
D) Prokaryotic chromosomes are more complex than those of eukaryotes.

Exam 8: The Cellular Basis of Reproduction and Inheritance

The phase of mitosis during which the mitotic spindle begins to form is

Eukaryotic chromosomes differ from prokaryotic chromosomes in that they

Which of the following statements regarding mitosis and meiosis is false?

If a chromosome fragment breaks off and then reattaches to the original chromosome,but in the reverse direction,the resulting chromosomal abnormality is called a(n)

Which of the following must occur for a plant or animal to grow and develop normally?

At a chiasma,two are attached to each other.

A pair of sex chromosomes found in a human male is most like

When animal cells are grown in a petri dish,they typically stop dividing once they have formed a single,unbroken layer on the bottom of the dish.This arrest of division is an example of

As a patch of scraped skin heals,the cells fill in the injured area but do not grow beyond that.This is an example of

Which of the following statements is false?

Sister chromatids are

Nondisjunction occurs when

Which of the following occurs during interphase?

What type of cell is shown?

Independent orientation of chromosomes at metaphase I results in an increase in the number of

Cancer is not usually inherited because

The genetic material is duplicated during

Which of the following statements regarding prokaryotes is false?

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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