Question 1

Which of the following statements regarding genetic diversity is false?

Accepted Answer

A) Genetic diversity is enhanced by random fertilization. 
B) Genetic diversity is enhanced by crossing over during meiosis. 
C) Genetic diversity is enhanced by independent orientation of chromosomes at metaphase I. 
D) Genetic diversity is enhanced by mitosis. 
A) Genetic diversity is enhanced by random fertilization. 
B) Genetic diversity is enhanced by crossing over during meiosis. 
C) Genetic diversity is enhanced by independent orientation of chromosomes at metaphase I. 
D) Genetic diversity is enhanced by mitosis.

Question 2

A karyotype is most like

Accepted Answer

A) a movie showing the stages of the reproductive cycle of a beetle. 
B) the answer key to a multiple- choice exam. 
C) a map showing the hidden location of buried treasure. 
D) photographs of every couple at a high school prom. 
A) a movie showing the stages of the reproductive cycle of a beetle. 
B) the answer key to a multiple- choice exam. 
C) a map showing the hidden location of buried treasure. 
D) photographs of every couple at a high school prom.

Question 3

Which of the following options correctly describes the behavior of a tetrad during anaphase I of meiosis?

Accepted Answer

A) It splits into two pairs of sister chromatids,and one pair goes to each pole of the dividing cell. 
B) It goes intact to one pole of the dividing cell. 
C) It splits into four chromosomes,which distribute in random pairs to the two poles of the dividing cell. 
D) It splits into two pairs of homologous,nonsister chromatids,and one pair goes to each pole of the dividing cell. 
A) It splits into two pairs of sister chromatids,and one pair goes to each pole of the dividing cell. 
B) It goes intact to one pole of the dividing cell. 
C) It splits into four chromosomes,which distribute in random pairs to the two poles of the dividing cell. 
D) It splits into two pairs of homologous,nonsister chromatids,and one pair goes to each pole of the dividing cell.

Question 4

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

Accepted Answer

A) Meiosis only occurs in the ovaries and testes. 
B) Mitosis produces daughter cells with half the number of chromosomes as the parent cell. 
C) All sexual life cycles involve an alternation of diploid and haploid stages. 
D) A normal human zygote has 46 chromosomes. 
A) Meiosis only occurs in the ovaries and testes. 
B) Mitosis produces daughter cells with half the number of chromosomes as the parent cell. 
C) All sexual life cycles involve an alternation of diploid and haploid stages. 
D) A normal human zygote has 46 chromosomes.

Question 5

During which phase of mitosis do the chromosomes line up on a plane equidistant from the two spindle poles?

Accepted Answer

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

Question 6

A benign tumor differs from a malignant tumor in that a benign tumor

Accepted Answer

A) does not metastasize. 
B) spreads from the original site. 
C) is cancerous. 
D) never causes health problems. 
A) does not metastasize. 
B) spreads from the original site. 
C) is cancerous. 
D) never causes health problems.

Question 7

The process by which the cytoplasm of a eukaryotic cell divides to produce two cells is called

Accepted Answer

A) binary fission. 
B) cytokinesis. 
C) telophase. 
D) mitosis. 
A) binary fission. 
B) cytokinesis. 
C) telophase. 
D) mitosis.

Question 8

The creation of genetically identical offspring by a single parent,without the participation of sperm and egg,is called

Accepted Answer

A) regeneration. 
B) asexual reproduction. 
C) spontaneous generation. 
D) sexual reproduction. 
A) regeneration. 
B) asexual reproduction. 
C) spontaneous generation. 
D) sexual reproduction.

Question 9

Both mitosis and meiosis are preceded by

Accepted Answer

A) prometaphase. 
B) telophase. 
C) prophase. 
D) interphase. 
A) prometaphase. 
B) telophase. 
C) prophase. 
D) interphase.

Question 10

Two chromosomes in a nucleus that carry genes controlling the same inherited characteristics are

Accepted Answer

A) parallel chromosomes. 
B) homologous chromosomes. 
C) heterologous chromosomes. 
D) complementary chromosomes. 
A) parallel chromosomes. 
B) homologous chromosomes. 
C) heterologous chromosomes. 
D) complementary chromosomes.

Question 11

How many generations does it take to develop a new plant species by polyploidy?

Accepted Answer

A) two 
B) ten 
C) about twenty 
D) one 
A) two 
B) ten 
C) about twenty 
D) one

Question 12

If these four cells resulted from cell division of a single cell with diploid chromosome number 2n = 4,what best describes what just occurred?

Accepted Answer

A) inversion 
B) translocation 
C) nondisjunction 
D) normal meiosis 
A) inversion 
B) translocation 
C) nondisjunction 
D) normal meiosis

Question 13

Mature human nerve cells and muscle cells

Accepted Answer

A) become cancerous more easily than other cell types. 
B) continue to divide throughout their lifetime. 
C) cease dividing after a predetermined number of cell generations. 
D) are permanently in a state of nondivision. 
A) become cancerous more easily than other cell types. 
B) continue to divide throughout their lifetime. 
C) cease dividing after a predetermined number of cell generations. 
D) are permanently in a state of nondivision.

Question 14

Strictly speaking,the phrase "like begets like" refers to

Accepted Answer

A) asexual reproduction only. 
B) production of gametes from a premeiotic cell. 
C) sexual reproduction only. 
D) all forms of reproduction. 
A) asexual reproduction only. 
B) production of gametes from a premeiotic cell. 
C) sexual reproduction only. 
D) all forms of reproduction.

Question 15

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

Accepted Answer

A) Cells produced by mitosis are diploid,whereas cells produced by meiosis are haploid. 
B) In meiosis four daughter cells are produced,whereas in mitosis two daughter cells are produced. 
C) In mitosis cytokinesis occurs once,whereas in meiosis cytokinesis occurs twice. 
D) Crossing over is a phenomenon that creates genetic diversity during mitosis. 
A) Cells produced by mitosis are diploid,whereas cells produced by meiosis are haploid. 
B) In meiosis four daughter cells are produced,whereas in mitosis two daughter cells are produced. 
C) In mitosis cytokinesis occurs once,whereas in meiosis cytokinesis occurs twice. 
D) Crossing over is a phenomenon that creates genetic diversity during mitosis.

Question 16

Which of the following variations of the sentence "Where is the cat" is most like a chromosomal deletion?

Accepted Answer

A) Where is cat the the cat? 
B) Where the is cat? 
C) Where is cat? 
D) Where is the the cat? 
A) Where is cat the the cat? 
B) Where the is cat? 
C) Where is cat? 
D) Where is the the cat?

Question 17

Looking into your microscope,you spot an unusual cell.Instead of the typical rounded cell shape,the cell has a very narrow middle separating two bulging ends.It sort of looks like the number 8! Then you realize that this cell is

Accepted Answer

A) in the G1 phase of interphase. 
B) in the S phase of interphase. 
C) about to undergo mitosis. 
D) undergoing cytokinesis. 
A) in the G1 phase of interphase. 
B) in the S phase of interphase. 
C) about to undergo mitosis. 
D) undergoing cytokinesis.

Question 18

Without crossing over

Accepted Answer

A) meiosis could not produce haploid gametes. 
B) cells could not complete meiosis. 
C) only a small number of unique gametes could be produced by a single individual. 
D) genetic recombination could not occur. 
A) meiosis could not produce haploid gametes. 
B) cells could not complete meiosis. 
C) only a small number of unique gametes could be produced by a single individual. 
D) genetic recombination could not occur.

Question 19

With the exception of identical twins,siblings who have the same two biological parents are likely to look similar,but not identical,to each other because they have

Accepted Answer

A) a similar but not identical combination of genes. 
B) identical chromosomes,but different genes. 
C) identical genes but different chromosomes. 
D) the same combination of traits,but different genes. 
A) a similar but not identical combination of genes. 
B) identical chromosomes,but different genes. 
C) identical genes but different chromosomes. 
D) the same combination of traits,but different genes.

Question 20

Which of the following statements regarding Down syndrome is false?

Accepted Answer

A) People with Down syndrome usually have a shorter life span than normal. 
B) Trisomy 21 is the cause of Down syndrome. 
C) Down syndrome is least likely to be seen in the infants of mothers over 40. 
D) Down syndrome is the most common serious birth defect in the United States. 
A) People with Down syndrome usually have a shorter life span than normal. 
B) Trisomy 21 is the cause of Down syndrome. 
C) Down syndrome is least likely to be seen in the infants of mothers over 40. 
D) Down syndrome is the most common serious birth defect in the United States.

Exam 8: The Cellular Basis of Reproduction and Inheritance

Which of the following statements regarding genetic diversity is false?

A karyotype is most like

Which of the following options correctly describes the behavior of a tetrad during anaphase I of meiosis?

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

During which phase of mitosis do the chromosomes line up on a plane equidistant from the two spindle poles?

A benign tumor differs from a malignant tumor in that a benign tumor

The process by which the cytoplasm of a eukaryotic cell divides to produce two cells is called

The creation of genetically identical offspring by a single parent,without the participation of sperm and egg,is called

Both mitosis and meiosis are preceded by

Two chromosomes in a nucleus that carry genes controlling the same inherited characteristics are

How many generations does it take to develop a new plant species by polyploidy?

If these four cells resulted from cell division of a single cell with diploid chromosome number 2n = 4,what best describes what just occurred?

Mature human nerve cells and muscle cells

Strictly speaking,the phrase "like begets like" refers to

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

Which of the following variations of the sentence "Where is the cat" is most like a chromosomal deletion?

Looking into your microscope,you spot an unusual cell.Instead of the typical rounded cell shape,the cell has a very narrow middle separating two bulging ends.It sort of looks like the number 8! Then you realize that this cell is

Without crossing over

With the exception of identical twins,siblings who have the same two biological parents are likely to look similar,but not identical,to each other because they have

Which of the following statements regarding Down syndrome 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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