Question 1

A person's karyotype shows 44 autosomes and one X chromosome. What is the best interpretation of this karyotype?

Accepted Answer

A) The karyotype is aneuploid, and the individual has only one allele for each of the genes on the X chromosome. 
B) The karyotype is aneuploid, and the individual is experiencing the pathologic condition of haploidy. 
C) The karyotype is euploid, making the individual a genotypic female and a phenotypic male. 
D) The karyotype is euploid, making the individual a genotypic male and a phenotypic female. 
A) The karyotype is aneuploid, and the individual has only one allele for each of the genes on the X chromosome. 
B) The karyotype is aneuploid, and the individual is experiencing the pathologic condition of haploidy. 
C) The karyotype is euploid, making the individual a genotypic female and a phenotypic male. 
D) The karyotype is euploid, making the individual a genotypic male and a phenotypic female. A

Question 2

What is the purpose of a chromosome centromere?

Accepted Answer

A) Connecting sister chromatids to form a chromosome 
B) Preventing the chromosome arm tips from unraveling 
C) Allowing chromatids to separate during DNA replication 
D) Ensuring that DNA replication proceeds only in the 3'-to-5' direction 
A) Connecting sister chromatids to form a chromosome 
B) Preventing the chromosome arm tips from unraveling 
C) Allowing chromatids to separate during DNA replication 
D) Ensuring that DNA replication proceeds only in the 3'-to-5' direction A

Question 3

Which chromosome number represents the euploid state for normal human somatic cells?

Accepted Answer

A) 44 
B) 46 
C) 47 
D) 48 
A) 44 
B) 46 
C) 47 
D) 48 B

Question 4

What activity occurs during M phase of the cell cycle?

Accepted Answer

A) The cell undergoes cytokinesis. 
B) Activity stops, and the cell "sleeps." 
C) All DNA is completely replicated. 
D) The cell greatly increases protein synthesis. 
A) The cell undergoes cytokinesis. 
B) Activity stops, and the cell "sleeps." 
C) All DNA is completely replicated. 
D) The cell greatly increases protein synthesis.

Question 5

What percentage of bases in a stretch of double-stranded DNA that contains 30% guanine (G) bases would be adenine (A)?

Accepted Answer

A) 70% 
B) 60% 
C) 30% 
D) 20% 
A) 70% 
B) 60% 
C) 30% 
D) 20%

Question 6

At what phase of the cell cycle are chromosomes visible as separate structures?

Accepted Answer

A) G1 
B) G2 
C) S 
D) M 
A) G1 
B) G2 
C) S 
D) M

Question 7

What would be the sequence of DNA that is complementary to a DNA section with the base sequence of GGTCAATCCTTAG?

Accepted Answer

A) GATTCCTAACTGG 
B) TTGACCGAAGGCT 
C) AACTGGCTTCCGA 
D) CCAGTTAGGAATC 
A) GATTCCTAACTGG 
B) TTGACCGAAGGCT 
C) AACTGGCTTCCGA 
D) CCAGTTAGGAATC

Question 8

Which statement regarding chromosome structure or function is true?

Accepted Answer

A) The chromatids of any single chromosome are known as "sister chromatids." 
B) The genes located on the telomeres of chromosomes are identical to the genes in the centromeres. 
C) Immediately before the mitosis phase of cell division, the chromosomes of all somatic cells are haploid. 
D) A specific gene allele on one chromosome has a complementary allele on the other chromosome of a pair. 
A) The chromatids of any single chromosome are known as "sister chromatids." 
B) The genes located on the telomeres of chromosomes are identical to the genes in the centromeres. 
C) Immediately before the mitosis phase of cell division, the chromosomes of all somatic cells are haploid. 
D) A specific gene allele on one chromosome has a complementary allele on the other chromosome of a pair.

Question 9

What is the term used to describe the organized picture of the paired chromosomes within a cell used to determine whether chromosome numbers, structures, and bandingpatterns are normal?

Accepted Answer

A) Pedigree 
B) Phenotype 
C) Karyotype 
D) Autotype 
A) Pedigree 
B) Phenotype 
C) Karyotype 
D) Autotype

Question 10

Under what normal condition are genotype and phenotype always the same?

Accepted Answer

A) Euploidy of alleles 
B) Aneuploidy of alleles 
C) Homozygosity of alleles 
D) Heterozygosity of alleles 
A) Euploidy of alleles 
B) Aneuploidy of alleles 
C) Homozygosity of alleles 
D) Heterozygosity of alleles

Question 11

What are the expected expressed blood types of children born to a mother who is B/O for blood type and a father who is A/B for blood type?

Accepted Answer

A) 25% A, 25% B, 25% O, 25% AB 
B) 25% A, 50% B, 0% O, 25% AB 
C) 50% A, 25% B, 25% O, 0% AB 
D) 50% A, 25% B, 0% O, 25% AB 
A) 25% A, 25% B, 25% O, 25% AB 
B) 25% A, 50% B, 0% O, 25% AB 
C) 50% A, 25% B, 25% O, 0% AB 
D) 50% A, 25% B, 0% O, 25% AB

Question 12

Which statement about the cell cycle phase of G0 is true?

Accepted Answer

A) Hyperplastic growth in place of hypertrophic growth 
B) Performance of specific differentiated functions 
C) Initiation and completion of nucleokinesis 
D) Replication of DNA 
A) Hyperplastic growth in place of hypertrophic growth 
B) Performance of specific differentiated functions 
C) Initiation and completion of nucleokinesis 
D) Replication of DNA

Question 13

What is the result of normal DNA replication?

Accepted Answer

A) Formation of two new daughter cells 
B) Formation of two identical sets of DNA 
C) Disappearance of the original parent cell 
D) Activation and attachment of spindle fibers 
A) Formation of two new daughter cells 
B) Formation of two identical sets of DNA 
C) Disappearance of the original parent cell 
D) Activation and attachment of spindle fibers

Question 14

What would be the expected result of a drug that affected a particular tissue by causing new DNA to form with covalent bonds instead of hydrogen bonds?

Accepted Answer

A) None of the cells in the affected tissue would be able to leave G0 and enter the cell cycle. 
B) Replication of DNA would result in identical DNA strands instead of complementary strands. 
C) Mitosis of cells in the tissue would result in the production of three new daughter cells instead of just two. 
D) The new cells that formed within this tissue would not be able to complete the next round of mitosis successfully. 
A) None of the cells in the affected tissue would be able to leave G0 and enter the cell cycle. 
B) Replication of DNA would result in identical DNA strands instead of complementary strands. 
C) Mitosis of cells in the tissue would result in the production of three new daughter cells instead of just two. 
D) The new cells that formed within this tissue would not be able to complete the next round of mitosis successfully.

Question 15

Why does a person with normal chromosomes only have two alleles for any single gene trait?

Accepted Answer

A) A minimum of two alleles is required for the expression of monogenic traits. 
B) When a dominant allele is paired with a recessive allele, only the dominant allele is expressed, and the recessive allele is silent. 
C) One allele for the monogenic trait is on the paternally derived chromosome, and the other allele is on the maternally derived chromosome. 
D) Expression of more than two alleles of any single-gene trait results in enhanced expression of recessive alleles and suppressed expression of dominant alleles. 
A) A minimum of two alleles is required for the expression of monogenic traits. 
B) When a dominant allele is paired with a recessive allele, only the dominant allele is expressed, and the recessive allele is silent. 
C) One allele for the monogenic trait is on the paternally derived chromosome, and the other allele is on the maternally derived chromosome. 
D) Expression of more than two alleles of any single-gene trait results in enhanced expression of recessive alleles and suppressed expression of dominant alleles.

Question 16

What is the term used to define alternative forms of a gene that may result in different expression of the trait coded for by that gene?

Accepted Answer

A) Alleles 
B) Bases 
C) Centromeres 
D) Diploids 
A) Alleles 
B) Bases 
C) Centromeres 
D) Diploids

Question 17

How does the DNA enzyme topoisomerase contribute to DNA replication?

Accepted Answer

A) Unwinds the double helix and separates the double-stranded DNA 
B) Creates a "nick" in the DNA supercoils, allowing them to straighten before replication 
C) Initiates DNA synthesis in multiple sites down the strand, making the process more efficient 
D) Connects and links the individual pieces of newly synthesized DNA to form a single strand 
A) Unwinds the double helix and separates the double-stranded DNA 
B) Creates a "nick" in the DNA supercoils, allowing them to straighten before replication 
C) Initiates DNA synthesis in multiple sites down the strand, making the process more efficient 
D) Connects and links the individual pieces of newly synthesized DNA to form a single strand

Question 18

Which condition or statement exemplifies the concept of genomics rather than genetics?

Accepted Answer

A) The gene for insulin is located on chromosome 11 in all people. 
B) Expression of any single gene is dependent on inheriting two alleles. 
C) Sex-linked recessive disorders affect males more often than females. 
D) One allele for each gene is inherited from the mother, and one is inherited from the father. 
A) The gene for insulin is located on chromosome 11 in all people. 
B) Expression of any single gene is dependent on inheriting two alleles. 
C) Sex-linked recessive disorders affect males more often than females. 
D) One allele for each gene is inherited from the mother, and one is inherited from the father.

Question 19

What is the most outstanding feature of a mature haploid cell?

Accepted Answer

A) It is usually homozygous. 
B) The sex chromosomes are missing. 
C) Only one chromosome of each pair is present. 
D) DNA synthesis occurs after mitosis instead of before. 
A) It is usually homozygous. 
B) The sex chromosomes are missing. 
C) Only one chromosome of each pair is present. 
D) DNA synthesis occurs after mitosis instead of before.

Question 20

Where is telomeric DNA located?

Accepted Answer

A) At the tips of the p and q arms of chromosomes. 
B) In the mitochondria of all somatic cells 
C) Only in the germ cells (ova and sperm) 
D) Within the histones of the solenoid 
A) At the tips of the p and q arms of chromosomes. 
B) In the mitochondria of all somatic cells 
C) Only in the germ cells (ova and sperm) 
D) Within the histones of the solenoid

A person's karyotype shows 44 autosomes and one X chromosome. What is the best interpretation of this karyotype?

What is the purpose of a chromosome centromere?

Which chromosome number represents the euploid state for normal human somatic cells?

What activity occurs during M phase of the cell cycle?

What percentage of bases in a stretch of double-stranded DNA that contains 30% guanine (G) bases would be adenine (A)?

At what phase of the cell cycle are chromosomes visible as separate structures?

What would be the sequence of DNA that is complementary to a DNA section with the base sequence of GGTCAATCCTTAG?

Which statement regarding chromosome structure or function is true?

What is the term used to describe the organized picture of the paired chromosomes within a cell used to determine whether chromosome numbers, structures, and bandingpatterns are normal?

Under what normal condition are genotype and phenotype always the same?

What are the expected expressed blood types of children born to a mother who is B/O for blood type and a father who is A/B for blood type?

Which statement about the cell cycle phase of G₀ is true?

What is the result of normal DNA replication?

What would be the expected result of a drug that affected a particular tissue by causing new DNA to form with covalent bonds instead of hydrogen bonds?

Why does a person with normal chromosomes only have two alleles for any single gene trait?

What is the term used to define alternative forms of a gene that may result in different expression of the trait coded for by that gene?

How does the DNA enzyme topoisomerase contribute to DNA replication?

Which condition or statement exemplifies the concept of genomics rather than genetics?

What is the most outstanding feature of a mature haploid cell?

Where is telomeric DNA located?

Protein Synthesis

Genetic Influence on Cell Division, Differentiation, and Gametogenesis

Patterns of Inheritance

Epigenetic Influences on Gene Expression

Autosomal Inheritance and Disorders

Sex Chromosome and Mitochondrial Inheritance and Disorders

Family History and Pedigree Construction

Congenital Anomalies, Basic Dysmorphology, and Genetic Assessment

Enzyme and Collagen Disorders

Common Childhood-Onset Genetic Disorders

Common Adult-Onset Disorders

Cardiovascular Disorders

The Genetics of Cancer

Genetic Contributions to Psychiatric and Behavioral Disorders

Genetic and Genomic Testing

Assessing Genomic Variation in Drug Response

Health Professionals and Genomic Care

Financial, Ethical, Legal, and Social Considerations

Genetic and Genomic Variation

Filters

Exam 1: DNA Structure and Function

A person's karyotype shows 44 autosomes and one X chromosome. What is the best interpretation of this karyotype?

What is the purpose of a chromosome centromere?

Which chromosome number represents the euploid state for normal human somatic cells?

What activity occurs during M phase of the cell cycle?

What percentage of bases in a stretch of double-stranded DNA that contains 30% guanine (G) bases would be adenine (A)?

At what phase of the cell cycle are chromosomes visible as separate structures?

What would be the sequence of DNA that is complementary to a DNA section with the base sequence of GGTCAATCCTTAG?

Which statement regarding chromosome structure or function is true?

What is the term used to describe the organized picture of the paired chromosomes within a cell used to determine whether chromosome numbers, structures, and bandingpatterns are normal?

Under what normal condition are genotype and phenotype always the same?

What are the expected expressed blood types of children born to a mother who is B/O for blood type and a father who is A/B for blood type?

Which statement about the cell cycle phase of G0 is true?

What is the result of normal DNA replication?

What would be the expected result of a drug that affected a particular tissue by causing new DNA to form with covalent bonds instead of hydrogen bonds?

Why does a person with normal chromosomes only have two alleles for any single gene trait?

What is the term used to define alternative forms of a gene that may result in different expression of the trait coded for by that gene?

How does the DNA enzyme topoisomerase contribute to DNA replication?

Which condition or statement exemplifies the concept of genomics rather than genetics?

What is the most outstanding feature of a mature haploid cell?

Where is telomeric DNA located?

Protein Synthesis

Genetic Influence on Cell Division, Differentiation, and Gametogenesis

Patterns of Inheritance

Epigenetic Influences on Gene Expression

Autosomal Inheritance and Disorders

Sex Chromosome and Mitochondrial Inheritance and Disorders

Family History and Pedigree Construction

Congenital Anomalies, Basic Dysmorphology, and Genetic Assessment

Enzyme and Collagen Disorders

Common Childhood-Onset Genetic Disorders

Common Adult-Onset Disorders

Cardiovascular Disorders

The Genetics of Cancer

Genetic Contributions to Psychiatric and Behavioral Disorders

Genetic and Genomic Testing

Assessing Genomic Variation in Drug Response

Health Professionals and Genomic Care

Financial, Ethical, Legal, and Social Considerations

Genetic and Genomic Variation

Filters

Which statement about the cell cycle phase of G₀ is true?