Question 1

If meiosis produces haploid cells,how is the diploid number restored for those organisms that spend most of their life cycle in the diploid state?

Accepted Answer

A) DNA replication 
B) reverse transcription 
C) synapsis 
D) fertilization 
A) DNA replication 
B) reverse transcription 
C) synapsis 
D) fertilization

Question 2

What is a major difference between meiosis II and mitosis?

Accepted Answer

A) Homologues align on the metaphase plate in meiosis II. 
B) Sister chromatids separate in mitosis,and homologues separate in meiosis II. 
C) Meiosis II takes place in a haploid cell,while mitosis takes place in diploid cells. 
D) Crossover takes place in meiosis II. 
A) Homologues align on the metaphase plate in meiosis II. 
B) Sister chromatids separate in mitosis,and homologues separate in meiosis II. 
C) Meiosis II takes place in a haploid cell,while mitosis takes place in diploid cells. 
D) Crossover takes place in meiosis II.

Question 3

Which of the following types of reproduction is associated with the most genetic variation among offspring?

Accepted Answer

A) binary fission 
B) asexual reproduction 
C) budding 
D) sexual reproduction 
A) binary fission 
B) asexual reproduction 
C) budding 
D) sexual reproduction

Question 4

Which of the following is an example of monosomy?

Accepted Answer

A) Turner's syndrome (XO) 
B) Klinefelter's syndrome (XXY) 
C) Down's syndrome (21,21,21) 
A) Turner's syndrome (XO) 
B) Klinefelter's syndrome (XXY) 
C) Down's syndrome (21,21,21)

Question 5

In which phase of meiosis do sister chromatids separate?

Accepted Answer

A) Metaphase I 
B) Anaphase I 
C) Metaphase II 
D) Anaphase II 
A) Metaphase I 
B) Anaphase I 
C) Metaphase II 
D) Anaphase II

Question 6

Egg and sperm,involved in sexual reproduction,are formed through a process called

Accepted Answer

A) binary fission. 
B) mitosis. 
C) meiosis. 
D) fertilization. 
A) binary fission. 
B) mitosis. 
C) meiosis. 
D) fertilization.

Question 7

The diploid number of a roundworm species is 4.You have a male and a female roundworm that are planning a family.Assuming random segregation of homologues during meiosis and no crossover,how many different possible combinations of chromosomes might there be in the offspring?

Accepted Answer

A) 4 
B) 8 
C) 16 
D) 64 
A) 4 
B) 8 
C) 16 
D) 64

Question 8

For the duration of meiosis I,each chromosome is

Accepted Answer

A) in the form of a tetrad. 
B) two sister chromatids joined by a centromere. 
C) a chromosome and its homologue. 
D) undergoing synapsis. 
A) in the form of a tetrad. 
B) two sister chromatids joined by a centromere. 
C) a chromosome and its homologue. 
D) undergoing synapsis.

Question 9

At what stage of meiosis does DNA replication take place?

Accepted Answer

A) DNA replication does not take place in cells destined to undergo meiosis. 
B) prophase I 
C) between meiosis I and meiosis II 
D) None.DNA replication occurs before meiosis I begins. 
A) DNA replication does not take place in cells destined to undergo meiosis. 
B) prophase I 
C) between meiosis I and meiosis II 
D) None.DNA replication occurs before meiosis I begins.

Question 10

Quaking aspen can send out underground stems.New trees can sprout from these stems.This is an example of what type of reproduction?

Accepted Answer

A) Sexual 
B) Alternation of generations 
C) Haploid 
D) Asexual 
A) Sexual 
B) Alternation of generations 
C) Haploid 
D) Asexual

Question 11

In sexual reproduction,the variation among offspring,and the fact that they are genetically different from their parents,is due to which of the following?

Accepted Answer

A) random alignment of homologues during meiosis I 
B) crossing over 
C) random process of fertilization 
D) all of the above contribute to genetic variability in sexual reproduction 
A) random alignment of homologues during meiosis I 
B) crossing over 
C) random process of fertilization 
D) all of the above contribute to genetic variability in sexual reproduction

Question 12

Figure 12.3  
-In Figure 12.3,what major event is taking place during this phase of meiosis?

Accepted Answer

A) synapsis 
B) crossing over 
C) homologues separate 
D) separation of sister chromatids 
A) synapsis 
B) crossing over 
C) homologues separate 
D) separation of sister chromatids

Question 13

Asexual reproduction takes place by which of the following processes?

Accepted Answer

A) meiosis 
B) fertilization 
C) chromosome exchange between organisms of the same species 
D) mitosis 
A) meiosis 
B) fertilization 
C) chromosome exchange between organisms of the same species 
D) mitosis

Question 14

The egg of a fruit fly has 4 chromosomes.How many chromosomes are in a somatic cell of a fruit fly?

Accepted Answer

A) 4 
B) 2 
C) 8 
D) 16 
A) 4 
B) 2 
C) 8 
D) 16

Question 15

Meiosis involves the creation of haploid cells from diploid cells.The haploid chromosome number is created when

Accepted Answer

A) homologous chromosomes separate. 
B) the S phase of the cell cycle is bypassed during meiotic interphase. 
C) sister chromatids separate. 
D) ova and sperm go through their respective maturation processes. 
A) homologous chromosomes separate. 
B) the S phase of the cell cycle is bypassed during meiotic interphase. 
C) sister chromatids separate. 
D) ova and sperm go through their respective maturation processes.

Question 16

Homologous chromosomes

Accepted Answer

A) are identical. 
B) carry information for the same traits. 
C) carry the same alleles. 
D) align on the metaphase plate in meiosis II. 
A) are identical. 
B) carry information for the same traits. 
C) carry the same alleles. 
D) align on the metaphase plate in meiosis II.

Question 17

What is a major difference between mitosis and meiosis I?

Accepted Answer

A) Sister chromatids separate in mitosis,and homologues separate in meiosis I. 
B) DNA replication takes place prior to mitosis,but not before meiosis I. 
C) Prophase is longer and more complex in mitosis. 
D) Only meiosis I results in daughter cells that contain identical genetic information. 
A) Sister chromatids separate in mitosis,and homologues separate in meiosis I. 
B) DNA replication takes place prior to mitosis,but not before meiosis I. 
C) Prophase is longer and more complex in mitosis. 
D) Only meiosis I results in daughter cells that contain identical genetic information.

Question 18

Chromosome number of hexaploid wheat,Triticum aestivum,can be represented by which of the following?

Accepted Answer

A) n 
B) 2n 
C) 4n 
D) 6n 
A) n 
B) 2n 
C) 4n 
D) 6n

Question 19

Figure 12.5  
-Grasshoppers have 11 pair of autosomes,and one sex chromosome.Which chromosome in Figure 12.5 is the sex chromosome?

Accepted Answer

A) e 
B) X 
C) j 
D) k 
A) e 
B) X 
C) j 
D) k

Exam 12: Meiosis

If meiosis produces haploid cells,how is the diploid number restored for those organisms that spend most of their life cycle in the diploid state?

What is a major difference between meiosis II and mitosis?

Which of the following types of reproduction is associated with the most genetic variation among offspring?

Which of the following is an example of monosomy?

In which phase of meiosis do sister chromatids separate?

Egg and sperm,involved in sexual reproduction,are formed through a process called

The diploid number of a roundworm species is 4.You have a male and a female roundworm that are planning a family.Assuming random segregation of homologues during meiosis and no crossover,how many different possible combinations of chromosomes might there be in the offspring?

For the duration of meiosis I,each chromosome is

At what stage of meiosis does DNA replication take place?

Quaking aspen can send out underground stems.New trees can sprout from these stems.This is an example of what type of reproduction?

In sexual reproduction,the variation among offspring,and the fact that they are genetically different from their parents,is due to which of the following?

Figure 12.3 -In Figure 12.3,what major event is taking place during this phase of meiosis?

Asexual reproduction takes place by which of the following processes?

The egg of a fruit fly has 4 chromosomes.How many chromosomes are in a somatic cell of a fruit fly?

Meiosis involves the creation of haploid cells from diploid cells.The haploid chromosome number is created when

Homologous chromosomes

What is a major difference between mitosis and meiosis I?

Chromosome number of hexaploid wheat,Triticum aestivum,can be represented by which of the following?

Figure 12.5 -Grasshoppers have 11 pair of autosomes,and one sex chromosome.Which chromosome in Figure 12.5 is the sex chromosome?

Biology and the Tree of Life

Water and Carbon: the Chemical Basis of Life

Protein Structure and Function

Nucleic Acids and the Rna World

An Introduction to Carbohydrates

Lipids, membranes, and the First Cells

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Photosynthesis

The Cell Cycle

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Dna and the Gene: Synthesis and Repair

How Genes Work

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Control of Gene Expression in Bacteria

Control of Gene Expression in Eukaryotes

Analyzing and Engineering Genes

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Evolution by Natural Selection

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