Question 1

In the snail Pomacea patula catemacensis n = 13.What is the diploid number for this organism?

Accepted Answer

A) 13 
B) 26 
C) 52 
D) 7 
A) 13 
B) 26 
C) 52 
D) 7 B

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. C

Question 3

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 C

Question 4

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 5

Hexaploid wheat was produced synthetically by He and co-workers.They mated the diploid species,Aegilops tauschii,and the tetraploid species,T.turgidum.Which of the following is an accurate statement about the relative contribution of each parent to the genome of the hexaploid offspring?

Accepted Answer

A) Each parent contributed equally to the genome of the offspring. 
B) Aegilops tauschii contributed four chromosomes by failing to complete meiosis after chromosome replication,and T.turgidum contributed two chromosomes. 
C) Aegilops tauschii contributed two chromosomes,and T.turgidum contributed four chromosomes. 
D) The hexaploid number appeared following mitosis with no subsequent cell division. 
A) Each parent contributed equally to the genome of the offspring. 
B) Aegilops tauschii contributed four chromosomes by failing to complete meiosis after chromosome replication,and T.turgidum contributed two chromosomes. 
C) Aegilops tauschii contributed two chromosomes,and T.turgidum contributed four chromosomes. 
D) The hexaploid number appeared following mitosis with no subsequent cell division.

Question 6

The diploid number of a roundworm species is 4.You have a male and a female roundworm that are planning a family.Assuming there is no crossover,and random segregation of homologues during meiosis,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 7

During which phase of meiosis would the cell first become haploid because homologous chromosomes
Separate?

Accepted Answer

A) anaphase I 
B) metaphase I 
C) anaphase II 
D) telophase II 
A) anaphase I 
B) metaphase I 
C) anaphase II 
D) telophase II

Question 8

Chromosomes and their homologues align at the equator of the cell during _____.

Accepted Answer

A) telophase I 
B) metaphase I 
C) telophase II 
D) metaphase II 
A) telophase I 
B) metaphase I 
C) telophase II 
D) metaphase II

Question 9

In 1985 Hassold and Chiu found that the likelihood of miscarriage increased with maternal age.What is the most likely explanation for the relationship between age and miscarriage?

Accepted Answer

A) Women in their mid-thirties and older have more health problems that interfere with their ability to maintain pregnancy. 
B) Older women typically have hormonal imbalances that prevent them from carrying a baby to term. 
C) The DNA replication that takes place immediately prior to meiosis is less accurate in older women. 
D) Ova are arrested in meiosis until ovulation.As a result,completion of meiosis in the older woman is more likely to result in aneuploidy or other chromosomal abnormalities. 
A) Women in their mid-thirties and older have more health problems that interfere with their ability to maintain pregnancy. 
B) Older women typically have hormonal imbalances that prevent them from carrying a baby to term. 
C) The DNA replication that takes place immediately prior to meiosis is less accurate in older women. 
D) Ova are arrested in meiosis until ovulation.As a result,completion of meiosis in the older woman is more likely to result in aneuploidy or other chromosomal abnormalities.

Question 10

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 11

Which type of reproduction is associated with using the most necessary resources (e.g. ,the most nutrients or most energy)?

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 12

Figure 12.5
-Male grasshoppers (such as the karyotype type shown here),have a single X chromosome.How many chromosomes would be in a sperm cell from this grasshopper?

Accepted Answer

A) 11 
B) 12 
C) 22 
D) 23 
A) 11 
B) 12 
C) 22 
D) 23

Question 13

Adaptation to a changing environment occurs most efficiently through which of the following processes?

Accepted Answer

A) mutation 
B) asexual reproduction and genetic recombination 
C) sexual reproduction 
A) mutation 
B) asexual reproduction and genetic recombination 
C) sexual reproduction

Question 14

Somatic cells of roundworms have four chromosomes.How many chromosomes would you find in an ovum from a roundworm?

Accepted Answer

A) four 
B) two 
C) eight 
D) a diploid number 
A) four 
B) two 
C) eight 
D) a diploid number

Question 15

Which of the following is an example of monosomy?

Accepted Answer

A) Turner's syndrome 
B) Klinefelter's syndrome 
C) Down's syndrome 
D) trisomy X 
A) Turner's syndrome 
B) Klinefelter's syndrome 
C) Down's syndrome 
D) trisomy X

Question 16

The variation among offspring,and the fact that they are genetically different from their parents,is not due to which of the following?

Accepted Answer

A) random alignment of homologues during prophase I 
B) crossing over 
C) fertilization 
D) random alignment of sister chromatids in metaphase II 
A) random alignment of homologues during prophase I 
B) crossing over 
C) fertilization 
D) random alignment of sister chromatids in metaphase II

Question 17

Centromeres split and sister chromosomes migrate to opposite poles in _____.

Accepted Answer

A) anaphase I 
B) telophase I 
C) anaphase II 
D) telophase II 
A) anaphase I 
B) telophase I 
C) anaphase II 
D) telophase II

Question 18

Genetic recombination takes place in which of the following processes?

Accepted Answer

A) prophase II of meiosis 
B) alignment of tetrads in metaphase I 
C) crossing over 
D) random alignment of homologous chromosomes in meiosis I 
A) prophase II of meiosis 
B) alignment of tetrads in metaphase I 
C) crossing over 
D) random alignment of homologous chromosomes in meiosis I

Question 19

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 20

Which of the following would enable you to detect aneuploidy?

Accepted Answer

A) autosomy 
B) karyotyping 
C) syngamy 
D) synapsis 
A) autosomy 
B) karyotyping 
C) syngamy 
D) synapsis

Exam 12: Meiosis

In the snail Pomacea patula catemacensis n = 13.What is the diploid number for this organism?

What is a major difference between meiosis II and mitosis?

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

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

Hexaploid wheat was produced synthetically by He and co-workers.They mated the diploid species,Aegilops tauschii,and the tetraploid species,T.turgidum.Which of the following is an accurate statement about the relative contribution of each parent to the genome of the hexaploid offspring?

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

During which phase of meiosis would the cell first become haploid because homologous chromosomes Separate?

Chromosomes and their homologues align at the equator of the cell during _____.

In 1985 Hassold and Chiu found that the likelihood of miscarriage increased with maternal age.What is the most likely explanation for the relationship between age and miscarriage?

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

Which type of reproduction is associated with using the most necessary resources (e.g. ,the most nutrients or most energy)?

Figure 12.5 -Male grasshoppers (such as the karyotype type shown here),have a single X chromosome.How many chromosomes would be in a sperm cell from this grasshopper?

Adaptation to a changing environment occurs most efficiently through which of the following processes?

Somatic cells of roundworms have four chromosomes.How many chromosomes would you find in an ovum from a roundworm?

Which of the following is an example of monosomy?

The variation among offspring,and the fact that they are genetically different from their parents,is not due to which of the following?

Centromeres split and sister chromosomes migrate to opposite poles in _____.

Genetic recombination takes place in which of the following processes?

Asexual reproduction takes place by which of the following processes?

Which of the following would enable you to detect aneuploidy?

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

Inside the Cell

Cell-Cell Interactions

Cellular Respiration and Fermentation

Photosynthesis

The Cell Cycle

Mendel and the Gene

Dna and the Gene: Synthesis and Repair

How Genes Work

Transcription and Translation

Control of Gene Expression in Bacteria

Control of Gene Expression in Eukaryotes

Analyzing and Engineering Genes

Genomics

Principles of Development

An Introduction to Animal Development

An Introduction to Plant Development

Evolution by Natural Selection

Evolutionary Processes

Speciation

Phylogenies and the History of Life

Bacteria and Archaea

Protists

Green Plants

Fungi

An Introduction to Animals

Protostome Animals

Deuterostome Animals

Viruses

Plant Form and Function

Water and Sugar Transport in Plants

Plant Nutrition

Plant Sensory Systems, signals, and Responses

Plant Reproduction

Animal Form and Function

Water and Electrolyte Balance in Animals

Animal Nutrition

Gas Exchange and Circulation

Electrical Signals in Animals

Animal Sensory Systems and Movement

Chemical Signals in Animals

Animal Reproduction

The Immune System in Animals

An Introduction to Ecology

Behavioral Ecology

Population Ecology

Community Ecology

Ecosystems

Biodiversity and Conservation Biology

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