Question 1

An individual possessing the sex chromosome combination "XY" is genetically:

Accepted Answer

A)  a male. 
B)  a female. 
C)  both. 
D)  neither. 
A)  a male. 
B)  a female. 
C)  both. 
D)  neither.

Question 2

A female can inherit an X-linked recessive trait if her father:

Accepted Answer

A)  is dominant and her mother is heterozygous for the trait. 
B)  is dominant and her mother is homozygous for the trait. 
C)  exhibits the trait and her mother is homozygous for the trait. 
D)  Both A and B are correct. 
A)  is dominant and her mother is heterozygous for the trait. 
B)  is dominant and her mother is homozygous for the trait. 
C)  exhibits the trait and her mother is homozygous for the trait. 
D)  Both A and B are correct.

Question 3

Color blindness is a sex-linked trait.Which of the following parental genotypes could produce a color-blind female? (X' indicates the color-blind trait.)

Accepted Answer

A)  X'X x XY 
B)  XX x X'Y 
C)  X'X x X'Y 
D)  X'X' x XY 
A)  X'X x XY 
B)  XX x X'Y 
C)  X'X x X'Y 
D)  X'X' x XY

Question 4

Gregor Mendel began the scientific study of genetics in the:

Accepted Answer

A)  1760s. 
B)  1800s. 
C)  1860s. 
D)  1920s. 
A)  1760s. 
B)  1800s. 
C)  1860s. 
D)  1920s.

Question 5

When did the scientific study of genetics begin? Give a brief summary of what happened.

Accepted Answer

The scientific study of genetics is ofte

Question 6

In human blood type,A and B are codominant,producing type AB.They are both dominant to the recessive O type.If parents had genotypes AO and BO,a child with which blood type could be theirs?

Accepted Answer

A)  A child with type A blood 
B)  A child with type B blood 
C)  A child with type O blood 
D)  All of the above children could be theirs. 
A)  A child with type A blood 
B)  A child with type B blood 
C)  A child with type O blood 
D)  All of the above children could be theirs.

Question 7

Match each of the terms with its corresponding definition.
-triplet of autosomes resulting from a mistake in meiosis

Accepted Answer

A) Recessive 
B) Codominance 
C) Monosomy 
D) Autosome 
E) Karyotype
F)Sex-linked trait
G)Dominant
H)Trisomy
I)Punnett square
J)Genome
K)Sex chromosome
L)Heterozygous
M)Homozygous
N)Genetics 
A) Recessive 
B) Codominance 
C) Monosomy 
D) Autosome 
E) Karyotype
F)Sex-linked trait
G)Dominant
H)Trisomy
I)Punnett square
J)Genome
K)Sex chromosome
L)Heterozygous
M)Homozygous
N)Genetics

Question 8

The subunits of chromatin wound around a histone protein is called a:

Accepted Answer

A)  gene. 
B)  chromosome. 
C)  nucleosome. 
D)  nucleotide. 
A)  gene. 
B)  chromosome. 
C)  nucleosome. 
D)  nucleotide.

Question 9

Which of the following diseases is not a single-gene recessive trait?

Accepted Answer

A)  Huntington disease 
B)  Tay-Sachs disease 
C)  PKU 
D)  All of the above are single-gene recessive traits. 
A)  Huntington disease 
B)  Tay-Sachs disease 
C)  PKU 
D)  All of the above are single-gene recessive traits.

Question 10

Explain the principle of independent assortment.

Accepted Answer

The principle of independent assortment

Question 11

Match each of the terms with its corresponding definition.
-one of 44 chromosomes in the human genome besides the two sex chromosomes

Accepted Answer

A) Recessive 
B) Codominance 
C) Monosomy 
D) Autosome 
E) Karyotype
F)Sex-linked trait
G)Dominant
H)Trisomy
I)Punnett square
J)Genome
K)Sex chromosome
L)Heterozygous
M)Homozygous
N)Genetics 
A) Recessive 
B) Codominance 
C) Monosomy 
D) Autosome 
E) Karyotype
F)Sex-linked trait
G)Dominant
H)Trisomy
I)Punnett square
J)Genome
K)Sex chromosome
L)Heterozygous
M)Homozygous
N)Genetics

Question 12

Each DNA molecule may be called a:

Accepted Answer

A)  chromatin strand. 
B)  chromosome. 
C)  gene. 
D)  Both A and B are correct. 
A)  chromatin strand. 
B)  chromosome. 
C)  gene. 
D)  Both A and B are correct.

Question 13

Assume that "A" is dominant for normal skin color and "a" is recessive for albinism.The parents with which of the following genotypes could have a child with albinism?

Accepted Answer

A)  AA x AA 
B)  Aa x AA 
C)  AA x aa 
D)  Aa x Aa 
A)  AA x AA 
B)  Aa x AA 
C)  AA x aa 
D)  Aa x Aa

Question 14

Match each of the terms with its corresponding definition.
-genotype with two different genes for one trait

Accepted Answer

A) Recessive 
B) Codominance 
C) Monosomy 
D) Autosome 
E) Karyotype
F)Sex-linked trait
G)Dominant
H)Trisomy
I)Punnett square
J)Genome
K)Sex chromosome
L)Heterozygous
M)Homozygous
N)Genetics 
A) Recessive 
B) Codominance 
C) Monosomy 
D) Autosome 
E) Karyotype
F)Sex-linked trait
G)Dominant
H)Trisomy
I)Punnett square
J)Genome
K)Sex chromosome
L)Heterozygous
M)Homozygous
N)Genetics

Question 15

Describe three types of gene therapy that may be used to treat a genetic disorder.

Accepted Answer

1. Gene replacement therapy: This involv

Question 16

Assume that "A1" is the gene for light hair and that "A2" is the gene for dark hair.Also assume that these genes demonstrate codominance.Then,the heterozygous genotype "A1A2" will exhibit the phenotype of:

Accepted Answer

A)  light hair. 
B)  dark hair. 
C)  hair color somewhere between light and dark. 
D)  red hair, because of the phenomenon of crossing over. 
A)  light hair. 
B)  dark hair. 
C)  hair color somewhere between light and dark. 
D)  red hair, because of the phenomenon of crossing over.

Question 17

Which of the following statements is(are)true regarding Tay-Sachs disease?

Accepted Answer

A)  Tay-Sachs disease results in the failure to make an essential lipid-processing enzyme. 
B)  This disease is most prevalent in Jewish populations. 
C)  This disease results in severe retardation and death by age 4. 
D)  All of the above are true regarding Tay-Sachs disease. 
A)  Tay-Sachs disease results in the failure to make an essential lipid-processing enzyme. 
B)  This disease is most prevalent in Jewish populations. 
C)  This disease results in severe retardation and death by age 4. 
D)  All of the above are true regarding Tay-Sachs disease.

Question 18

When one or more DNA nucleotides are missing in a gene,it can be called a(n):

Accepted Answer

A)  deletion. 
B)  insertion. 
C)  mutation. 
D)  Both A and C are correct. 
A)  deletion. 
B)  insertion. 
C)  mutation. 
D)  Both A and C are correct.

Question 19

The principle of independent assortment states that:

Accepted Answer

A)  each offspring from a single set of parents is very likely to be genetically unique. 
B)  genetic variation is likely to occur during reproduction. 
C)  after meiosis, each gamete produced is likely to have a different set of 23 chromosomes. 
D)  all of the above are true. 
A)  each offspring from a single set of parents is very likely to be genetically unique. 
B)  genetic variation is likely to occur during reproduction. 
C)  after meiosis, each gamete produced is likely to have a different set of 23 chromosomes. 
D)  all of the above are true.

Question 20

Which of the following is(are)not (a)mutagen(s)?

Accepted Answer

A)  Radiation 
B)  Viruses 
C)  Chemicals 
D)  All of the above are mutagens. 
A)  Radiation 
B)  Viruses 
C)  Chemicals 
D)  All of the above are mutagens.

Exam 37: B: Genetics and Heredity

An individual possessing the sex chromosome combination "XY" is genetically:

A female can inherit an X-linked recessive trait if her father:

Color blindness is a sex-linked trait.Which of the following parental genotypes could produce a color-blind female? (X' indicates the color-blind trait.)

Gregor Mendel began the scientific study of genetics in the:

When did the scientific study of genetics begin? Give a brief summary of what happened.

In human blood type,A and B are codominant,producing type AB.They are both dominant to the recessive O type.If parents had genotypes AO and BO,a child with which blood type could be theirs?

Match each of the terms with its corresponding definition. -triplet of autosomes resulting from a mistake in meiosis

The subunits of chromatin wound around a histone protein is called a:

Which of the following diseases is not a single-gene recessive trait?

Explain the principle of independent assortment.

Match each of the terms with its corresponding definition. -one of 44 chromosomes in the human genome besides the two sex chromosomes

Each DNA molecule may be called a:

Assume that "A" is dominant for normal skin color and "a" is recessive for albinism.The parents with which of the following genotypes could have a child with albinism?

Match each of the terms with its corresponding definition. -genotype with two different genes for one trait

Describe three types of gene therapy that may be used to treat a genetic disorder.

Assume that "A1" is the gene for light hair and that "A2" is the gene for dark hair.Also assume that these genes demonstrate codominance.Then,the heterozygous genotype "A1A2" will exhibit the phenotype of:

Which of the following statements is(are)true regarding Tay-Sachs disease?

When one or more DNA nucleotides are missing in a gene,it can be called a(n):

The principle of independent assortment states that:

Which of the following is(are)not (a)mutagen(s)?

A: Organization of the Body

B: Organization of the Body

A: The Chemical Basis of Life

B: The Chemical Basis of Life

A: Anatomy of Cells

B: Anatomy of Cells

Physiology of Cells

Cell Growth and Reproduction

Tissues

A: Skin and Its Appendages

B: Skin and Its Appendages

A: Skeletal Tissues

B: Skeletal Tissues

Skeletal System

A: Articulations

B: Articulations

A: Anatomy of the Muscular System

B: Anatomy of the Muscular System

A: Physiology of the Muscular System

B: Physiology of the Muscular System

A: Nervous System Cells

B: Nervous System Cells

A: Central Nervous System

B: Central Nervous System

Peripheral Nervous System

Autonomic Nervous System

A: Sense Organs

B: Sense Organs

Endocrine System

Endocrine Glands

Blood

Anatomy of the Cardiovascular System

A: Physiology of the Cardiovascular System

B: Physiology of the Cardiovascular System

Lymphatic System

A: Immune System

B: Immune System

Stress

Anatomy of the Respiratory System

A: Physiology of the Respiratory System

B: Physiology of the Respiratory System

A: Anatomy of the Digestive System

B: Anatomy of the Digestive System

A: Physiology of the Digestive System

B: Physiology of the Digestive System

A: Nutrition and Metabolism

B: Nutrition and Metabolism

A: Urinary System

B: Urinary System

Fluid and Electrolyte Balance

Acid-Base Balance

Male Reproductive System

A: Female Reproductive System

B: Female Reproductive System

A: Growth and Development

B: Growth and Development

A: Genetics and Heredity

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