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ASU BIO 340 Exam 1
Questions & Answers
2026/2027 | Arizona State
University | Latest Review
(Rationales)
Document Overview
This document offers 188 questions with verified correct answers and detailed
rationales for ASU BIO 340. Covering fundamental principles of genetics, it is an
ideal resource for comprehensive study, in-depth review, and certification
preparation. Students will find this an invaluable tool for mastering the course
material.
100% Accurate Questions and Answers
100% Guarantee Pass - Verified by Experts Expert-Verified
Verified Answers · Detailed Rationales · 188 Questions · September 2026
ASU BIO 340 Exam 1 Questions & Answers 2026/2027 | Arizona State University | Latest Review (Rationales) - Practice Questions Page 0
, Topics Covered
Section 1: Foundations of Genetics & Heredity
Questions covering foundations of Genetics & Heredity concepts.
Section 2: Molecular Basis of Heredity
Questions covering molecular Basis of Heredity concepts.
Section 3: DNA Replication & Gene Expression
Questions covering dNA Replication & Gene Expression concepts.
Section 4: Cellular Structure & Division
Questions covering cellular Structure & Division concepts.
Section 5: Mendelian Genetics & Inheritance Patterns
Questions covering mendelian Genetics & Inheritance Patterns concepts.
Section 6: Probability & Statistical Concepts
Questions covering probability & Statistical Concepts concepts.
Section 7: Meiosis & Gamete Formation
Questions covering meiosis & Gamete Formation concepts.
Section 8: Sex Determination & X-linked Inheritance
Questions covering sex Determination & X-linked Inheritance concepts.
Questions
QUESTION 1 OF 188
selective breeding (artificial selection)
Correct Answer: the process of developing organisms with specific characteristics as chosen by the
breeders
Rationale: Selective breeding, also known as artificial selection in BIO 340, is the intentional mating of organisms to
produce offspring with desired traits. This process relies on breeders observing and selecting individuals that exhibit
specific characteristics they wish to enhance or propagate. Over generations, this directed selection leads to the
development of organisms that possess the chosen traits, such as increased yield in crops or specific physical attributes
in domesticated animals. This aligns with the process of developing organisms with specific characteristics as chosen
by the breeders.
QUESTION 2 OF 188
Gregor Mendel (1822-1884)
Correct Answer: Amateur botanist who published an explanation of hereditary transmission in plants in
1866. Known for his pea-plant experiments and commonly referred to as the "father of genetics"
ASU BIO 340 Exam 1 Questions & Answers 2026/2027 | Arizona State University | Latest Review (Rationales) - Practice Questions Page 0
, QUESTION 3 OF 188
modern genetics
Correct Answer: the study of heredity and the variation of inherited characteristics
Rationale: Modern genetics, as a field within BIO 340, is fundamentally concerned with understanding how traits
are passed from parents to offspring and the mechanisms that generate diversity within populations. This involves
investigating the molecular basis of inheritance, gene expression, and the evolutionary forces that shape genetic
variation. Therefore, the definition encompassing heredity and the variation of inherited characteristics accurately
captures the scope of this discipline. This aligns with the study of heredity and the variation of inherited
characteristics.
QUESTION 4 OF 188
hereditary material
Correct Answer: the information which is passed from one cellular generation to the next (encoded in
DNA in humans).
Rationale: Hereditary material, in the context of cellular biology and genetics, refers to the molecular substance that
carries genetic information from parent cells to daughter cells. This information is encoded within the structure of
nucleic acids, specifically DNA in most organisms including humans, dictating traits and cellular functions. Therefore,
hereditary material is fundamentally the informational blueprint transmitted across cellular generations. This aligns
with the information which is passed from one cellular generation to the next (encoded in DNA in humans)..
QUESTION 5 OF 188
Watson and Crick (1953)
Correct Answer: the two scientists who discovered the structure and shape of DNA
Rationale: James Watson and Francis Crick are credited with proposing the double helix model of DNA in 1953, a
seminal discovery in molecular biology. This breakthrough elucidated the structure and shape of deoxyribonucleic
acid, explaining its mechanism for replication and genetic information storage. Their work laid the foundation for
modern genetics and molecular biology research. This aligns with the two scientists who discovered the structure and
shape of DNA.
QUESTION 6 OF 188
nucleotide
Correct Answer: a building block of DNA, consisting of a five-carbon sugar covalently bonded to a
nitrogenous base and a phosphate group.
Rationale: A nucleotide serves as the fundamental monomer unit for nucleic acids like DNA. Its structure is precisely
defined by a pentose sugar, a nitrogenous base, and at least one phosphate group, which are covalently linked. This
molecular architecture enables nucleotides to polymerize into the genetic material that carries biological information.
This aligns with consisting of a five-carbon sugar covalently bonded to a nitrogenous base and a phosphate group., a
building block of DNA and five-carbon.
ASU BIO 340 Exam 1 Questions & Answers 2026/2027 | Arizona State University | Latest Review (Rationales) - Practice Questions Page 0
, QUESTION 7 OF 188
genes
Correct Answer: DNA segments that serve as the key functional units in hereditary transmission.
Rationale: Genes are the fundamental units of heredity, acting as specific segments of DNA that carry the
instructions for protein synthesis or regulation. Their role is to encode traits that are passed from parents to offspring,
thereby driving hereditary transmission. This definition aligns with the core molecular and genetic principles of BIO
340. This aligns with DNA segments that serve as the key functional units in hereditary transmission..
QUESTION 8 OF 188
chromosomes
Correct Answer: a threadlike structure of nucleic acids and protein found in the nucleus of most living
cells, carrying genetic information in the form of genes.
Rationale: a threadlike structure of nucleic acids and protein found in the nucleus of most living cells, carrying
genetic information in the form of genes., chromosomes are the fundamental carriers of genetic information. They are
composed of nucleic acids (DNA) and proteins, organized into a thread-like structure. Found within the nucleus of
eukaryotic cells, these structures contain genes, which dictate hereditary traits.
QUESTION 9 OF 188
nucleoid
Correct Answer: a dense region of DNA in a prokaryotic cell.
Rationale: The nucleoid is a defining characteristic of prokaryotic cells, distinguishing them from eukaryotic cells
which possess a membrane-bound nucleus. It represents the area within the cytoplasm where the single, circular
chromosome is located and highly organized. Therefore, the nucleoid is accurately described as a dense region of DNA
within a prokaryotic cell. This aligns with a dense region of DNA in a prokaryotic cell..
QUESTION 10 OF 188
locus
Correct Answer: position of a gene on a chromosome
Rationale: In genetics, the locus refers to the specific physical location of a gene or other DNA sequence on a
chromosome. This defined position is critical for understanding gene mapping, inheritance patterns, and genetic
variation. Therefore, the locus is best described as the position of a gene on a chromosome.
QUESTION 11 OF 188
stop codon
Correct Answer: UAG, UAA, or UGA; the codon that ends all RNA sequences.
Rationale: UAG, UAA, or UGA; the codon that ends all RNA sequences., stop codons signal the termination of protein
synthesis by binding to release factors in the ribosome. The three specific stop codons in the genetic code are UAG,
UAA, and UGA. These codons do not code for any amino acid and thus mark the end of a messenger RNA (mRNA)
sequence during translation.
ASU BIO 340 Exam 1 Questions & Answers 2026/2027 | Arizona State University | Latest Review (Rationales) - Practice Questions Page 0
ASU BIO 340 Exam 1
Questions & Answers
2026/2027 | Arizona State
University | Latest Review
(Rationales)
Document Overview
This document offers 188 questions with verified correct answers and detailed
rationales for ASU BIO 340. Covering fundamental principles of genetics, it is an
ideal resource for comprehensive study, in-depth review, and certification
preparation. Students will find this an invaluable tool for mastering the course
material.
100% Accurate Questions and Answers
100% Guarantee Pass - Verified by Experts Expert-Verified
Verified Answers · Detailed Rationales · 188 Questions · September 2026
ASU BIO 340 Exam 1 Questions & Answers 2026/2027 | Arizona State University | Latest Review (Rationales) - Practice Questions Page 0
, Topics Covered
Section 1: Foundations of Genetics & Heredity
Questions covering foundations of Genetics & Heredity concepts.
Section 2: Molecular Basis of Heredity
Questions covering molecular Basis of Heredity concepts.
Section 3: DNA Replication & Gene Expression
Questions covering dNA Replication & Gene Expression concepts.
Section 4: Cellular Structure & Division
Questions covering cellular Structure & Division concepts.
Section 5: Mendelian Genetics & Inheritance Patterns
Questions covering mendelian Genetics & Inheritance Patterns concepts.
Section 6: Probability & Statistical Concepts
Questions covering probability & Statistical Concepts concepts.
Section 7: Meiosis & Gamete Formation
Questions covering meiosis & Gamete Formation concepts.
Section 8: Sex Determination & X-linked Inheritance
Questions covering sex Determination & X-linked Inheritance concepts.
Questions
QUESTION 1 OF 188
selective breeding (artificial selection)
Correct Answer: the process of developing organisms with specific characteristics as chosen by the
breeders
Rationale: Selective breeding, also known as artificial selection in BIO 340, is the intentional mating of organisms to
produce offspring with desired traits. This process relies on breeders observing and selecting individuals that exhibit
specific characteristics they wish to enhance or propagate. Over generations, this directed selection leads to the
development of organisms that possess the chosen traits, such as increased yield in crops or specific physical attributes
in domesticated animals. This aligns with the process of developing organisms with specific characteristics as chosen
by the breeders.
QUESTION 2 OF 188
Gregor Mendel (1822-1884)
Correct Answer: Amateur botanist who published an explanation of hereditary transmission in plants in
1866. Known for his pea-plant experiments and commonly referred to as the "father of genetics"
ASU BIO 340 Exam 1 Questions & Answers 2026/2027 | Arizona State University | Latest Review (Rationales) - Practice Questions Page 0
, QUESTION 3 OF 188
modern genetics
Correct Answer: the study of heredity and the variation of inherited characteristics
Rationale: Modern genetics, as a field within BIO 340, is fundamentally concerned with understanding how traits
are passed from parents to offspring and the mechanisms that generate diversity within populations. This involves
investigating the molecular basis of inheritance, gene expression, and the evolutionary forces that shape genetic
variation. Therefore, the definition encompassing heredity and the variation of inherited characteristics accurately
captures the scope of this discipline. This aligns with the study of heredity and the variation of inherited
characteristics.
QUESTION 4 OF 188
hereditary material
Correct Answer: the information which is passed from one cellular generation to the next (encoded in
DNA in humans).
Rationale: Hereditary material, in the context of cellular biology and genetics, refers to the molecular substance that
carries genetic information from parent cells to daughter cells. This information is encoded within the structure of
nucleic acids, specifically DNA in most organisms including humans, dictating traits and cellular functions. Therefore,
hereditary material is fundamentally the informational blueprint transmitted across cellular generations. This aligns
with the information which is passed from one cellular generation to the next (encoded in DNA in humans)..
QUESTION 5 OF 188
Watson and Crick (1953)
Correct Answer: the two scientists who discovered the structure and shape of DNA
Rationale: James Watson and Francis Crick are credited with proposing the double helix model of DNA in 1953, a
seminal discovery in molecular biology. This breakthrough elucidated the structure and shape of deoxyribonucleic
acid, explaining its mechanism for replication and genetic information storage. Their work laid the foundation for
modern genetics and molecular biology research. This aligns with the two scientists who discovered the structure and
shape of DNA.
QUESTION 6 OF 188
nucleotide
Correct Answer: a building block of DNA, consisting of a five-carbon sugar covalently bonded to a
nitrogenous base and a phosphate group.
Rationale: A nucleotide serves as the fundamental monomer unit for nucleic acids like DNA. Its structure is precisely
defined by a pentose sugar, a nitrogenous base, and at least one phosphate group, which are covalently linked. This
molecular architecture enables nucleotides to polymerize into the genetic material that carries biological information.
This aligns with consisting of a five-carbon sugar covalently bonded to a nitrogenous base and a phosphate group., a
building block of DNA and five-carbon.
ASU BIO 340 Exam 1 Questions & Answers 2026/2027 | Arizona State University | Latest Review (Rationales) - Practice Questions Page 0
, QUESTION 7 OF 188
genes
Correct Answer: DNA segments that serve as the key functional units in hereditary transmission.
Rationale: Genes are the fundamental units of heredity, acting as specific segments of DNA that carry the
instructions for protein synthesis or regulation. Their role is to encode traits that are passed from parents to offspring,
thereby driving hereditary transmission. This definition aligns with the core molecular and genetic principles of BIO
340. This aligns with DNA segments that serve as the key functional units in hereditary transmission..
QUESTION 8 OF 188
chromosomes
Correct Answer: a threadlike structure of nucleic acids and protein found in the nucleus of most living
cells, carrying genetic information in the form of genes.
Rationale: a threadlike structure of nucleic acids and protein found in the nucleus of most living cells, carrying
genetic information in the form of genes., chromosomes are the fundamental carriers of genetic information. They are
composed of nucleic acids (DNA) and proteins, organized into a thread-like structure. Found within the nucleus of
eukaryotic cells, these structures contain genes, which dictate hereditary traits.
QUESTION 9 OF 188
nucleoid
Correct Answer: a dense region of DNA in a prokaryotic cell.
Rationale: The nucleoid is a defining characteristic of prokaryotic cells, distinguishing them from eukaryotic cells
which possess a membrane-bound nucleus. It represents the area within the cytoplasm where the single, circular
chromosome is located and highly organized. Therefore, the nucleoid is accurately described as a dense region of DNA
within a prokaryotic cell. This aligns with a dense region of DNA in a prokaryotic cell..
QUESTION 10 OF 188
locus
Correct Answer: position of a gene on a chromosome
Rationale: In genetics, the locus refers to the specific physical location of a gene or other DNA sequence on a
chromosome. This defined position is critical for understanding gene mapping, inheritance patterns, and genetic
variation. Therefore, the locus is best described as the position of a gene on a chromosome.
QUESTION 11 OF 188
stop codon
Correct Answer: UAG, UAA, or UGA; the codon that ends all RNA sequences.
Rationale: UAG, UAA, or UGA; the codon that ends all RNA sequences., stop codons signal the termination of protein
synthesis by binding to release factors in the ribosome. The three specific stop codons in the genetic code are UAG,
UAA, and UGA. These codons do not code for any amino acid and thus mark the end of a messenger RNA (mRNA)
sequence during translation.
ASU BIO 340 Exam 1 Questions & Answers 2026/2027 | Arizona State University | Latest Review (Rationales) - Practice Questions Page 0
