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Material
TEST BANK
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Genetics Essentials: Concepts and Connections 5th Edition by
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Benjamin A. Pierce
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www.PlusBay.Plus
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Material
TABLE OF CONTENT
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Chapter 01: Introduction to Genetics .......................................................................................... 3
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Chapter 02: Chromosomes and Cellular Reproduction .............................................................. 15
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Chapter 03: Basic Principles of Heredity .................................................................................... 32
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Chapter 04: Extensions and Modifications of Basic Principles .................................................... 59
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Chapter 05: Linkage, Recombination, and Eukaryotic Gene Mapping ........................................ 98
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Chapter 06: Chromosome Variation ........................................................................................ 115
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Chapter 07: Bacterial and Viral Genetic Systems ..................................................................... 139
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Chapter 08 DNA: The Chemical Nature of the Gene ................................................................ 152
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Chapter 09: DNA Replication and Recombination .................................................................... 181
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Chapter 10: From DNA to Proteins: Transcription and RNA Processing .................................... 198
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Chapter 11: From DNA to Proteins: Translation ....................................................................... 224
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Chapter 12: Control of Gene Expression .................................................................................. 244
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Chapter 13: Gene Mutations, Transposable Elements, and DNA Repair .................................. 278
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Chapter 14: Molecular Genetic Analysis and Biotechnology .................................................... 298
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Chapter 15: Genomics and Proteomics.................................................................................... 314
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Chapter 16: Cancer Genetics ................................................................................................... 332
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Chapter 17: Quantitative Genetics .......................................................................................... 346
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Chapter 18: Population and Evolutionary Genetics ................................................................. 366
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Material
Chapter 01: Introduction to Genetics
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1. Albinism is rare in most human populations, occurring at a frequency of about 1 in 20,000
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people. However, the trait occurs at a frequency of 1 in 200 in certain Hopi villages of Black
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Mesa in Arizona. Explain in terms of natural selection why albinism is so rare in most human
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populations.
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ANSWER: In most populations, there is fairly strong selection against albinism because albinos
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don’t produce melanin, causing their skin cells not to be protected from the damaging
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effects of sunlight. Also, the lack of melanin in their eyes causes them to have poor
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eyesight. Finally, in most cultures albinos are seen as abnormal, and they are not
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normally sought out for marriage and mating. Therefore, in most populations the
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alleles that cause albinism are selected against, and they decrease in frequency or are
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kept at a low level, causing the recessive trait to be rare.
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2. Albinism is rare in most human populations, occurring at a frequency of about 1 in 20,000
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people. However, the trait occurs at a frequency of 1 in 200 in certain Hopi villages of Black
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Mesa in Arizona. Explain in terms of natural selection why the trait is so much more common
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among the Hopis of Black Mesa.
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ANSWER: Albinos occupy a privileged position among the Hopis of Black Mesa. In this
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culture, albinos are viewed as especially pretty, clean, and intelligent, and they
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often occupy positions of leadership. Albinos are celebrated in the villages as a
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sign of purity of Hopi blood in the community.
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Furthermore, albinos are often excused from normal male field labor because of their ss ss ss ss ss ss ss ss ss ss ss ss
sensitivity to sunlight, causing them to be left behind in the village with the women
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during the daytime. This allows them extra mating opportunities compared to the
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other men of the village. Therefore, the alleles that cause albinism are either
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selected for in this culture or at least not selected against as strongly as in other
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cultures, allowing the trait to occur at a much higher frequency.
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3. Which one of the following pairings between the subdiscipline of genetics and the
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ss phenomenon is INCORRECT? ss ss
a. evolution—population genetics ss
b. gene regulation—molecular genetics
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c. allelic frequency alteration—population genetics
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d. arrangement of genes on chromosome—transmission genetics ss ss ss ss ss
e. chemical nature of the gene—transmission genetics ss ss ss ss ss
ANSWER: e ss
4. Which one of the following topics of research belongs to the discipline of transmission genetics?
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a. inheritance pattern of gene alleles ss ss ss ss
b. mechanism of DNA replication ss ss ss
c. gene expression patterns ss ss
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Material
d. evolution
e. chemical modification of nucleic acids
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ANSWER: a ss
5. The complete genetic makeup of an organism is referred to as its
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a. chromosome.
b. alleles.
c. locus.