Question 1

Coding portions of DNA tend to lie in clusters rich in which two nucleotides?

Accepted Answer

A)  Thymine and cytosine 
B)  Cytosine and guanine 
C)  Cytosine and adenine 
D)  Thymine and adenine 
A)  Thymine and cytosine 
B)  Cytosine and guanine 
C)  Cytosine and adenine 
D)  Thymine and adenine

Question 2

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 3

The products of meiosis are:

Accepted Answer

A)  gametes. 
B)  haploid cells. 
C)  made only of autosomes. 
D)  both A and B. 
A)  gametes. 
B)  haploid cells. 
C)  made only of autosomes. 
D)  both A and B.

Question 4

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.

Question 5

Trisomy conditions that involve about 75% of the autosomes are fatal to the offspring.

Accepted Answer

A) True 
 B)False

Question 6

Match each of the terms with its corresponding definition.
-Nonsexual trait carried on 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 7

Gene linkage and crossing over have opposite effects on genetic variation.

Accepted Answer

A) True 
 B)False

Question 8

A genetic carrier is someone who has the gene but does not express the trait. An example would be someone who is heterozygous for a dominant/recessive trait.

Accepted Answer

A) True 
 B)False

Question 9

What is a genetic mutation? What types of genetic mutations are there and what are some causes of mutation?

Accepted Answer

A genetic mutation is a permanent altera

Question 10

About 1% of the sperm and 10% of the oocytes have extra, missing, or broken chromosomes.

Accepted Answer

A) True 
 B)False

Question 11

In order for reproduction to be successful, all gametes must be haploid cells.

Accepted Answer

A) True 
 B)False

Question 12

Genes determine the structure and function of the body by regulating the body's production of:

Accepted Answer

A)  carbohydrates. 
B)  lipids. 
C)  enzymes. 
D)  all of the above. 
A)  carbohydrates. 
B)  lipids. 
C)  enzymes. 
D)  all of the above.

Question 13

Theoretically, the best chance for producing a girl infant would be for insemination to occur on the day of ovulation.

Accepted Answer

A) True 
 B)False

Question 14

The genetic code is transmitted to offspring in discrete, independent units that are called:

Accepted Answer

A)  chromosomes. 
B)  genes. 
C)  gametes. 
D)  nucleosomes. 
A)  chromosomes. 
B)  genes. 
C)  gametes. 
D)  nucleosomes.

Question 15

Describe three possible hypotheses for the genetic basis of cancer.

Accepted Answer

1) The mutation hypothesis: This hypothe

Question 16

Gene replacement therapy attempts to add genetically altered cells to the body.

Accepted Answer

A) True 
 B)False

Question 17

A karyotype is effective only in identifying chromosomal abnormalities.

Accepted Answer

A) True 
 B)False

Question 18

Match each condition with its corresponding statement or definition.
-Degenerative brain disorder characterized by chorea, progressing to severe dementia and death generally by age 55

Accepted Answer

A) Down syndrome 
B) Huntington disease 
C) Klinefelter syndrome deficiency 
D) Multiple neurofibromatosis 
E) Parkinson disease
F)Retinitis pigmentosa
G)Severe combined immune deficiency
H)Tay-Sachs disease 
A) Down syndrome 
B) Huntington disease 
C) Klinefelter syndrome deficiency 
D) Multiple neurofibromatosis 
E) Parkinson disease
F)Retinitis pigmentosa
G)Severe combined immune deficiency
H)Tay-Sachs disease

Question 19

In a pedigree, a partially shaded circle would indicate a female carrier for the trait.

Accepted Answer

A) True 
 B)False

Question 20

One hypothesis regarding cancer involves the presence of oncogenes that, under normal conditions, regulate cell division so that it proceeds normally.

Accepted Answer

A) True 
 B)False

Exam 48: Genetics and Heredity

Coding portions of DNA tend to lie in clusters rich in which two nucleotides?

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:

The products of meiosis are:

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

Trisomy conditions that involve about 75% of the autosomes are fatal to the offspring.

Match each of the terms with its corresponding definition. -Nonsexual trait carried on sex chromosomes

Gene linkage and crossing over have opposite effects on genetic variation.

A genetic carrier is someone who has the gene but does not express the trait. An example would be someone who is heterozygous for a dominant/recessive trait.

What is a genetic mutation? What types of genetic mutations are there and what are some causes of mutation?

About 1% of the sperm and 10% of the oocytes have extra, missing, or broken chromosomes.

In order for reproduction to be successful, all gametes must be haploid cells.

Genes determine the structure and function of the body by regulating the body's production of:

Theoretically, the best chance for producing a girl infant would be for insemination to occur on the day of ovulation.

The genetic code is transmitted to offspring in discrete, independent units that are called:

Describe three possible hypotheses for the genetic basis of cancer.

Gene replacement therapy attempts to add genetically altered cells to the body.

A karyotype is effective only in identifying chromosomal abnormalities.

Match each condition with its corresponding statement or definition. -Degenerative brain disorder characterized by chorea, progressing to severe dementia and death generally by age 55

In a pedigree, a partially shaded circle would indicate a female carrier for the trait.

One hypothesis regarding cancer involves the presence of oncogenes that, under normal conditions, regulate cell division so that it proceeds normally.

Organization of the Body

Homeostasis

Chemical Basis of Life

Biomolecules

Cell Structure

Cell Function

Cell Growth and Development

Introduction to Tissues

Tissue Types

Skin

Skeletal Tissues

Axial Skeleton

Appendicular Skeleton

Articulations

Axial Muscles

Appendicular Muscles

Muscle Contraction

Nervous System Cells

Nerve Signaling

Central Nervous System

Peripheral Nervous System

Autonomic Nervous System

General Senses

Special Senses

Endocrine Regulation

Endocrine Glands

Blood

Heart

Blood Vessels

Circulation of the Blood

Lymphatic System

Innate Immunity

Adaptive Immunity

Stress

Respiratory Tract

Ventilation

Gas Exchange & Transport

Upper Digestive Tract

Lower Digestive Tract

Digestion and Absorption

Nutrition and Metabolism

Urinary System

Fluid and Electrolyte Balance

Acid Base Balance

Male Reproductive System

Female Reproductive System

Growth and Development

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