Solutions And Problem-Solving Manual For
Genetics: A Conceptual Approach Sixth Edition Jung
H. Choi Mark E. Mccallum Latest Version 2026
,Contents
Chapter 1 Introduction to genetics 1
Chapter 2 Chromosomes and cellular reproduction 14
Chapter 3 Basic principles of heredity 35
Chapter 4 Sex determination and sex-linked characteristics 69
Chapter 5 Extensions and modifications of basic principles 93
Chapter 6 Pedigree analysis, applications, and genetic testing 122
Chapter 7 Linkage, recombination, and eukaryotic gene mapping 143
Chapter 8 Chromosome variation 174
Chapter 9 Bacterial and viral genetic systems 202
Chapter 10 Dna: the chemical nature of the gene 224
Chapter 11 Chromosome structure and organelle dna 243
Chapter 12 Dna replication and recombination 261
Chapter 13 Transcription 280
Chapter 14 Rna molecules and rna processing 299
Chapter 15 The genetic code and translation 315
Chapter 16 Control of gene expression in prokaryotes 336
Chapter 17 Control of gene expression in eukaryotes 351
Chapter 18 Gene mutations and dna repair 362
Chapter 19 Molecular genetic analysis and biotechnology 386
Chapter 20 Genomics and proteomics 404
Chapter 21 Epigenetics 422
Chapter 22 Developmental genetics and immunogenetics 434
Chapter 23 Cancer genetics 445
Chapter 24 Quantitative genetics 455
Chapter 25 Population genetics 475
Chapter 26 Evolutionary genetics 494
,Chapter one: introduction to genetics
Comprehension questions
Section 1.1
*1. How did hopi culture contribute to the high incidence of albinism among members
of the hopi tribe?
Solution:
In hopi culture, albino individuals were considered special and awarded special
status in the village. Hopi male albinos were not required to work the fields, thus
avoiding extensive exposure to sunlight that could prove damaging or deadly.
Because the male albinos remained in the village during the day, they had mating
advantages over the males who participated in farming and other duties outside of
the village. Albinism was considered to be a positive trait reflecting the purity of the
villagers. Finally, the small population size of the hopi tribe may have helped
increase the allele frequency of the albino gene due to chance.
2. Outline some of the ways in which genetics is important to all of us.
Solution:
Genetics directly influences our lives and is fundamental to what and who we are.
For example, genes affect our appearance (e.g., eye color, height, weight, skin
pigmentation, and hair color). Our susceptibility to diseases and disorders is
affected by our genetic makeup. Genetics plays a significant role in researching and
developing techniques to diagnose and treat these hereditary diseases. Genes may
also influence our intelligence and personality. Genetic techniques have enabled
scientists to develop genetically modified crops that are resistant to pesticides and
herbicides or that have enhanced nutritional properties making it possible to
produce larger quantities of food for the world’s growing population. Lastly, genetic
engineering has made it possible to mass produce pharmaceuticals and other
substances of commercial value.
3. Give at least three examples of the role of genetics in society today.
Solution:
Genetics plays important roles in the diagnosis and treatment of hereditary
diseases: in breeding plants and animals for improved production and disease
resistance; and in producing pharmaceuticals and novel crops through genetic
engineering.
4. Briefly explain why genetics is crucial to modern biology.
, 2 Chapter One: Introduction to Genetics
Solution:
Genetics is crucial to modern biology in that it provides unifying principles: the
genetic code is universal, meaning that all organisms use nucleic acid as their
genetic material, and all organisms encode genetic information in the same manner.
The study of many other biological disciplines, such as developmental biology,
ecology, and evolutionary biology, is supported by genetics.
5. List the three traditional subdisciplines of genetics and summarize what each covers.
Solution:
1) transmission (classical) genetics is concerned with the inheritance of genes from
one generation to the next. It also deals with the location of genes on chromosomes
and gene- mapping. 2) molecular genetics focuses on the structure, organization,
and function of genes at the molecular level. Molecular genetics is also concerned
with the processes by which genetic information is transferred and expressed. 3)
population genetics studies genetic variation and changes in genes and allele
frequencies within groups of individuals of the same species over time.
6. What are some characteristics of model genetic organisms that make them
useful for genetic studies?
Solution:
Model genetic organisms have relatively short generation times, produce numerous
progeny, are amenable to laboratory manipulations, and can be maintained and
propagated inexpensively.
Section 1.2
7. When and where did agriculture first arise? What role did genetics play in the
development of the first domesticated plants and animals?
Solution:
Agriculture first arose 10,000 to 12,000 years ago in the area now referred to as the
middle east (i.e., turkey, iran, iraq, syria, jordan, and israel). Early farmers selectively
bred individual wild plants or animals that had useful characteristics with others
that had similar useful traits. The farmers then selected for offspring that contained
those useful features.
Early farmers did not completely understand genetics, but they clearly understood
that breeding individual plants or animals with desirable traits would lead to
offspring that contained these same traits. This selective breeding led to the
development of domesticated plants and animals.
8. Outline the notion of pangenesis and explain how it differs from the germ-plasm theory.
Genetics: A Conceptual Approach Sixth Edition Jung
H. Choi Mark E. Mccallum Latest Version 2026
,Contents
Chapter 1 Introduction to genetics 1
Chapter 2 Chromosomes and cellular reproduction 14
Chapter 3 Basic principles of heredity 35
Chapter 4 Sex determination and sex-linked characteristics 69
Chapter 5 Extensions and modifications of basic principles 93
Chapter 6 Pedigree analysis, applications, and genetic testing 122
Chapter 7 Linkage, recombination, and eukaryotic gene mapping 143
Chapter 8 Chromosome variation 174
Chapter 9 Bacterial and viral genetic systems 202
Chapter 10 Dna: the chemical nature of the gene 224
Chapter 11 Chromosome structure and organelle dna 243
Chapter 12 Dna replication and recombination 261
Chapter 13 Transcription 280
Chapter 14 Rna molecules and rna processing 299
Chapter 15 The genetic code and translation 315
Chapter 16 Control of gene expression in prokaryotes 336
Chapter 17 Control of gene expression in eukaryotes 351
Chapter 18 Gene mutations and dna repair 362
Chapter 19 Molecular genetic analysis and biotechnology 386
Chapter 20 Genomics and proteomics 404
Chapter 21 Epigenetics 422
Chapter 22 Developmental genetics and immunogenetics 434
Chapter 23 Cancer genetics 445
Chapter 24 Quantitative genetics 455
Chapter 25 Population genetics 475
Chapter 26 Evolutionary genetics 494
,Chapter one: introduction to genetics
Comprehension questions
Section 1.1
*1. How did hopi culture contribute to the high incidence of albinism among members
of the hopi tribe?
Solution:
In hopi culture, albino individuals were considered special and awarded special
status in the village. Hopi male albinos were not required to work the fields, thus
avoiding extensive exposure to sunlight that could prove damaging or deadly.
Because the male albinos remained in the village during the day, they had mating
advantages over the males who participated in farming and other duties outside of
the village. Albinism was considered to be a positive trait reflecting the purity of the
villagers. Finally, the small population size of the hopi tribe may have helped
increase the allele frequency of the albino gene due to chance.
2. Outline some of the ways in which genetics is important to all of us.
Solution:
Genetics directly influences our lives and is fundamental to what and who we are.
For example, genes affect our appearance (e.g., eye color, height, weight, skin
pigmentation, and hair color). Our susceptibility to diseases and disorders is
affected by our genetic makeup. Genetics plays a significant role in researching and
developing techniques to diagnose and treat these hereditary diseases. Genes may
also influence our intelligence and personality. Genetic techniques have enabled
scientists to develop genetically modified crops that are resistant to pesticides and
herbicides or that have enhanced nutritional properties making it possible to
produce larger quantities of food for the world’s growing population. Lastly, genetic
engineering has made it possible to mass produce pharmaceuticals and other
substances of commercial value.
3. Give at least three examples of the role of genetics in society today.
Solution:
Genetics plays important roles in the diagnosis and treatment of hereditary
diseases: in breeding plants and animals for improved production and disease
resistance; and in producing pharmaceuticals and novel crops through genetic
engineering.
4. Briefly explain why genetics is crucial to modern biology.
, 2 Chapter One: Introduction to Genetics
Solution:
Genetics is crucial to modern biology in that it provides unifying principles: the
genetic code is universal, meaning that all organisms use nucleic acid as their
genetic material, and all organisms encode genetic information in the same manner.
The study of many other biological disciplines, such as developmental biology,
ecology, and evolutionary biology, is supported by genetics.
5. List the three traditional subdisciplines of genetics and summarize what each covers.
Solution:
1) transmission (classical) genetics is concerned with the inheritance of genes from
one generation to the next. It also deals with the location of genes on chromosomes
and gene- mapping. 2) molecular genetics focuses on the structure, organization,
and function of genes at the molecular level. Molecular genetics is also concerned
with the processes by which genetic information is transferred and expressed. 3)
population genetics studies genetic variation and changes in genes and allele
frequencies within groups of individuals of the same species over time.
6. What are some characteristics of model genetic organisms that make them
useful for genetic studies?
Solution:
Model genetic organisms have relatively short generation times, produce numerous
progeny, are amenable to laboratory manipulations, and can be maintained and
propagated inexpensively.
Section 1.2
7. When and where did agriculture first arise? What role did genetics play in the
development of the first domesticated plants and animals?
Solution:
Agriculture first arose 10,000 to 12,000 years ago in the area now referred to as the
middle east (i.e., turkey, iran, iraq, syria, jordan, and israel). Early farmers selectively
bred individual wild plants or animals that had useful characteristics with others
that had similar useful traits. The farmers then selected for offspring that contained
those useful features.
Early farmers did not completely understand genetics, but they clearly understood
that breeding individual plants or animals with desirable traits would lead to
offspring that contained these same traits. This selective breeding led to the
development of domesticated plants and animals.
8. Outline the notion of pangenesis and explain how it differs from the germ-plasm theory.
