Question 1

The cells at the end of meiosis I are not ready to function as gametes.Why not?

Accepted Answer

A) They have the right number of chromosomes but no cytoplasm. 
B) They have the right number of chromosomes but too much cytoplasm. 
C) They are haploid, but the chromosomes are still in duplicated form. 
D) The chromosomes have divided, but there has been no cytokinesis. 
E) The homologous chromosomes have not yet separated. 
A) They have the right number of chromosomes but no cytoplasm. 
B) They have the right number of chromosomes but too much cytoplasm. 
C) They are haploid, but the chromosomes are still in duplicated form. 
D) The chromosomes have divided, but there has been no cytokinesis. 
E) The homologous chromosomes have not yet separated. C

Question 2

What is the flagellum in sperm for?

Accepted Answer

A) to provide a diploid set of chromosomes 
B) for energy production 
C) to provide a haploid set of chromosomes 
D) to serve as a structure for the physical propulsion of the sperm 
E) to serve as a reserve of energy and nutrients for the zygote 
A) to provide a diploid set of chromosomes 
B) for energy production 
C) to provide a haploid set of chromosomes 
D) to serve as a structure for the physical propulsion of the sperm 
E) to serve as a reserve of energy and nutrients for the zygote D

Question 3

In birds,the female carries an unmatched pair of chromosomes (denoted WZ),corresponding roughly to the XY chromosomes in mammalian males,and male birds carry a matched set of chromosomes (denoted WW),corresponding to the pair of XX chromosomes in mammalian females.Therefore,in birds the ________ chromosome determines the sex of the offspring,and it is gametes from the ________ parent that determine sex.

Accepted Answer

A) Z; male 
B) Z; female 
C) W; female 
D) W; male 
E) W; either male or female 
A) Z; male 
B) Z; female 
C) W; female 
D) W; male 
E) W; either male or female B

Question 4

In mitosis,cells duplicate their chromosomes once and divide once.In meiosis,cells duplicate their chromosomes ________ and divide ________.

Accepted Answer

A) once; once 
B) twice; once 
C) twice; twice 
D) once; twice 
A) once; once 
B) twice; once 
C) twice; twice 
D) once; twice

Question 5

What is the advantage of ova production resulting in one egg and three polar bodies?

Accepted Answer

A) This allows the egg to receive most of the cytoplasm. 
B) This reduces egg size by distributing most of the cytoplasm to the polar bodies. 
C) This allows the egg to receive all the chromosomes. 
D) This removes Golgi complex, lysosomes, and other organelles from the egg. 
E) This creates more polar bodies, which are the cells that will actually be fertilized. 
A) This allows the egg to receive most of the cytoplasm. 
B) This reduces egg size by distributing most of the cytoplasm to the polar bodies. 
C) This allows the egg to receive all the chromosomes. 
D) This removes Golgi complex, lysosomes, and other organelles from the egg. 
E) This creates more polar bodies, which are the cells that will actually be fertilized.

Question 6

When does an oocyte complete meiosis II?

Accepted Answer

A) in the seventh month of fetal life 
B) immediately after release from the ovary 
C) immediately after birth 
D) after fertilization 
E) as soon as puberty begins 
A) in the seventh month of fetal life 
B) immediately after release from the ovary 
C) immediately after birth 
D) after fertilization 
E) as soon as puberty begins

Question 7

What factors produce genetic diversity in bacteria?

Accepted Answer

A) crossing over 
B) mitosis 
C) crossing over and independent assortment 
D) mutation and gene transfer 
A) crossing over 
B) mitosis 
C) crossing over and independent assortment 
D) mutation and gene transfer

Question 8

Describe the process of meiosis and ova formation in a human female; start with prenatal life,and end with fertilization.

Accepted Answer

Oogonia are produced before birth,up to

Question 9

If a diploid cell has 12 chromosome pairs,how many different combinations of chromosomes are possible in gametes after meiosis?

Accepted Answer

A) 12²⁰ 
B) 12² 
C) 2¹² 
D) 10¹² 
E) 12¹² 
A) 12²⁰ 
B) 12² 
C) 2¹² 
D) 10¹² 
E) 12¹²

Question 10

Which of the following processes contributes least to genetic diversity?

Accepted Answer

A) crossing over 
B) combining of gametes from two different individuals 
C) independent assortment of chromosomes at the metaphase plate 
D) duplication of DNA 
A) crossing over 
B) combining of gametes from two different individuals 
C) independent assortment of chromosomes at the metaphase plate 
D) duplication of DNA

Question 11

The fertilization of an egg by a sperm produces a cell called a/an:

Accepted Answer

A) ovum. 
B) gamete. 
C) zygote. 
D) oocyte. 
A) ovum. 
B) gamete. 
C) zygote. 
D) oocyte.

Question 12

Which of the following occur during telophase I?

Accepted Answer

A) Cytokinesis produces four haploid gametes. 
B) Sister chromatids separate and move to opposite poles. 
C) Cytokinesis produces two cells that will each go through meiosis II. 
D) Homologous chromosomes separate. 
E) One cell divides two times, without interruption, into four cells. 
A) Cytokinesis produces four haploid gametes. 
B) Sister chromatids separate and move to opposite poles. 
C) Cytokinesis produces two cells that will each go through meiosis II. 
D) Homologous chromosomes separate. 
E) One cell divides two times, without interruption, into four cells.

Question 13

If a eukaryotic cell has 20 chromosomes and it undergoes meiosis,how many cells will result,and how many chromosomes will they contain?

Accepted Answer

A) 4 cells, each with 20 chromosomes 
B) 4 cells, each with 10 chromosomes 
C) 2 cells, each with 10 chromosomes 
D) 2 cells, each with 20 chromosomes 
A) 4 cells, each with 20 chromosomes 
B) 4 cells, each with 10 chromosomes 
C) 2 cells, each with 10 chromosomes 
D) 2 cells, each with 20 chromosomes

Question 14

From the list below,which choice represents a correct difference between sperm production and egg production?

Accepted Answer

A) Sperm are produced by mitosis; eggs are produced by meiosis. 
B) Sperm are produced by meiosis; eggs are produced by mitosis. 
C) Four mature sperm are produced from one cell; one large egg is produced from one cell. 
D) Eight mature sperm are produced from one cell; two eggs are produced from one cell. 
E) Sperm are produced by somatic (body)cells; eggs are produced by gametes. 
A) Sperm are produced by mitosis; eggs are produced by meiosis. 
B) Sperm are produced by meiosis; eggs are produced by mitosis. 
C) Four mature sperm are produced from one cell; one large egg is produced from one cell. 
D) Eight mature sperm are produced from one cell; two eggs are produced from one cell. 
E) Sperm are produced by somatic (body)cells; eggs are produced by gametes.

Question 15

Cells that are ________ possess a single set of chromosomes.

Accepted Answer

A) diploid 
B) haploid 
C) zygotes 
D) somatic 
A) diploid 
B) haploid 
C) zygotes 
D) somatic

Question 16

In humans,the sperm contributes the chromosome that determines whether the child will be a boy or a girl.

Accepted Answer

A) True 
 B)False

Question 17

A plant branch that regenerates roots and develops into another plant is:

Accepted Answer

A) genetically unique. 
B) the product of a special type of sexual reproduction. 
C) the product of self-fertilization. 
D) the product of a recombination event. 
E) genetically identical to the plant from which the branch was taken. 
A) genetically unique. 
B) the product of a special type of sexual reproduction. 
C) the product of self-fertilization. 
D) the product of a recombination event. 
E) genetically identical to the plant from which the branch was taken.

Question 18

The products of meiosis are:

Accepted Answer

A) two diploid cells. 
B) four haploid cells. 
C) four diploid cells. 
D) two haploid cells. 
A) two diploid cells. 
B) four haploid cells. 
C) four diploid cells. 
D) two haploid cells.

Question 19

Match between columns
                        Premises: Sister chromatids separate
Recombination occurs
Homologous chromosomes separate
Pairs of sister chromatids line up at the equator ,with each one facing opposite poles
Random alignment of maternal and paternal homologous chromosomes results in independent assortment

Accepted Answer

The Answer of metaphase II and anaphase II and metaphase is...

Question 20

If the chromosome number were not halved when gametes are produced,what would be the result of fertilization?

Accepted Answer

A) They zygote would have the same number of chromosomes as the parents. 
B) The zygote would have double the number of chromosomes as the parents. 
C) The zygote would have half the number of chromosomes as the parents. 
D) The zygote would undergo meiosis again to halve the number of chromosomes. 
A) They zygote would have the same number of chromosomes as the parents. 
B) The zygote would have double the number of chromosomes as the parents. 
C) The zygote would have half the number of chromosomes as the parents. 
D) The zygote would undergo meiosis again to halve the number of chromosomes.

Exam 10: Preparing for Sexual Reproduction: Meiosis

The cells at the end of meiosis I are not ready to function as gametes.Why not?

What is the flagellum in sperm for?

In mitosis,cells duplicate their chromosomes once and divide once.In meiosis,cells duplicate their chromosomes ________ and divide ________.

What is the advantage of ova production resulting in one egg and three polar bodies?

When does an oocyte complete meiosis II?

What factors produce genetic diversity in bacteria?

Describe the process of meiosis and ova formation in a human female; start with prenatal life,and end with fertilization.

If a diploid cell has 12 chromosome pairs,how many different combinations of chromosomes are possible in gametes after meiosis?

Which of the following processes contributes least to genetic diversity?

The fertilization of an egg by a sperm produces a cell called a/an:

Which of the following occur during telophase I?

If a eukaryotic cell has 20 chromosomes and it undergoes meiosis,how many cells will result,and how many chromosomes will they contain?

From the list below,which choice represents a correct difference between sperm production and egg production?

Cells that are ________ possess a single set of chromosomes.

In humans,the sperm contributes the chromosome that determines whether the child will be a boy or a girl.

A plant branch that regenerates roots and develops into another plant is:

The products of meiosis are:

If the chromosome number were not halved when gametes are produced,what would be the result of fertilization?

Science As a Way of Learning: a Guide to the Natural World

Fundamental Building Blocks: Chemistry, water, and Ph

Lifes Components: Biological Molecules

Lifes Home: the Cell

Lifes Border: the Plasma Membrane

Lifes Mainspring: an Introduction to Energy

Vital Harvest: Deriving Energy From Food

The Green Worlds Gift: Photosynthesis

The Links in Lifes Chain: Genetics and Cell Division

The First Geneticist: Mendel and His Discoveries

Units of Heredity: Chromosomes and Inheritance

Passing on Lifes Information: Dna Structure and Replication

How Proteins Are Made: Genetic Transcription, translation, and Regulation

The Future Isnt What It Used to Be: Biotechnology

An Introduction to Evolution: Charles Darwin, evolutionary Thought, and the Evidence for Evolution

The Means of Evolution: Microevolution

The Outcomes of Evolution: Macroevolution

A Slow Unfolding: the History of Life on Earth

Arriving Late,traveling Far: the Evolution of Human Beings

Viruses,bacteria,archaea,and Protists: the Diversity of Life 1

Fungi: the Diversity of Life 2

Animals: the Diversity of Life 3

Plants: the Diversity of Life 4

The Angiosperms: Form and Function in Flowering Plants

Body Support and Movement: the Integumentary, skeletal, and Muscular Systems

Communication and Control 1: the Nervous System

Communication and Control 2: the Endocrine System

Defending the Body: the Immune System

Transport and Exchange 1: Blood and Breath

Transport and Exchange 2: Digestion, nutrition, and Elimination

An Amazingly Detailed Script: Animal Development

How the Baby Came to Be: Human Reproduction

An Interactive Living World 1: Populations in Ecology

An Interactive Living World 2: Communities in Ecology

An Interactive Living World 3: Ecosystems and Biomes

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In mitosis,cells duplicate their chromosomes once and divide once.In meiosis,cells duplicate their chromosomes and divide .