Question 1

Which disorder affecting the jaw bones and facies is characterized by fusion of the anterior portion of the maxillary gingiva to the upper lip from canine to canine?

Accepted Answer

A)  Gardner syndrome 
B)  Mandibulofacial dysostosis 
C)  Ellis-van Creveld syndrome 
D)  Cherubism 
A)  Gardner syndrome 
B)  Mandibulofacial dysostosis 
C)  Ellis-van Creveld syndrome 
D)  Cherubism

Question 2

Which statement is true regarding management of patients with cyclic neutropenia?

Accepted Answer

A)  Preventive antibiotic therapy is instituted to protect against secondary opportunistic infections. 
B)  Treatment should be done when the circulating neutrophil count is low to reduce the risk of complications such as gingival hemorrhage and secondary infection. 
C)  Dental hygiene care increases the risk of opportunistic infections in patients with cyclic neutropenia. 
D)  Patients are treated periodically with vitamin D to reduce symptoms. 
A)  Preventive antibiotic therapy is instituted to protect against secondary opportunistic infections. 
B)  Treatment should be done when the circulating neutrophil count is low to reduce the risk of complications such as gingival hemorrhage and secondary infection. 
C)  Dental hygiene care increases the risk of opportunistic infections in patients with cyclic neutropenia. 
D)  Patients are treated periodically with vitamin D to reduce symptoms.

Question 3

A codon in DNA is formed by a sequence of _____ bases.

Accepted Answer

A)  two 
B)  three 
C)  four 
D)  six 
A)  two 
B)  three 
C)  four 
D)  six

Question 4

In DNA a sequence of thymine, adenine, and cytosine (TAC) is always matched by

Accepted Answer

A)  adenine, cytosine, and guanine (ACG). 
B)  guanine, adenine, and cytosine (GA
C) . 
C)  adenine, thymine, and guanine (ATG). 
D)  a five-carbon sugar and a phosphate. 
A)  adenine, cytosine, and guanine (ACG). 
B)  guanine, adenine, and cytosine (GA
C) . 
C)  adenine, thymine, and guanine (ATG). 
D)  a five-carbon sugar and a phosphate.

Question 5

A patient with unilateral or bilateral aplasia of the clavicles will have which characteristics?

Accepted Answer

A)  Hyperplastic paranasal sinuses 
B)  Short and wide neck 
C)  Mushroom shape of the cranium because of premature closure of the fontanelles 
D)  Be able to approximate their shoulders to the midline 
A)  Hyperplastic paranasal sinuses 
B)  Short and wide neck 
C)  Mushroom shape of the cranium because of premature closure of the fontanelles 
D)  Be able to approximate their shoulders to the midline

Question 6

Gingival and periodontal disease has been reported in _____% of individuals with Down syndrome.

Accepted Answer

A)  10 
B)  25 
C)  50 
D)  90 
A)  10 
B)  25 
C)  50 
D)  90

Question 7

Features of second meiosis include

Accepted Answer

A)  a replication of DNA before initiation. 
B)  essentially a mitotic division in which each chromosome splits longitudinally. 
C)  formation of four cells from the parent cell. 
D)  the formation of 2n DNA. 
A)  a replication of DNA before initiation. 
B)  essentially a mitotic division in which each chromosome splits longitudinally. 
C)  formation of four cells from the parent cell. 
D)  the formation of 2n DNA.

Question 8

The basic defect found with radicular dentin dysplasia lies in the

Accepted Answer

A)  stellate reticulum. 
B)  epithelial root sheath. 
C)  stratum intermedium. 
D)  dental papilla. 
A)  stellate reticulum. 
B)  epithelial root sheath. 
C)  stratum intermedium. 
D)  dental papilla.

Question 9

For each clinical syndrome below, select the corresponding chromosomal abnormality from the list provided.
-Cri du chat

Accepted Answer

A) Characterized by multiple abnormalities in various organs 
B) Down syndrome as a result of nondisjunction 
C) Nondisjunction of the X chromosome in the paternal gamete 
D) Deletion on the short arm of chromosome 5 
E) Fertilized ovum has two X chromosomes plus a Y chromosome 
A) Characterized by multiple abnormalities in various organs 
B) Down syndrome as a result of nondisjunction 
C) Nondisjunction of the X chromosome in the paternal gamete 
D) Deletion on the short arm of chromosome 5 
E) Fertilized ovum has two X chromosomes plus a Y chromosome

Question 10

Most cases of Down syndrome are associated with

Accepted Answer

A)  maternal consumption of alcohol. 
B)  late maternal age at the time of conception. 
C)  estrogen supplements. 
D)  inhalation of vapors from volatile substances. 
A)  maternal consumption of alcohol. 
B)  late maternal age at the time of conception. 
C)  estrogen supplements. 
D)  inhalation of vapors from volatile substances.

Question 11

Each statement is true regarding focal palmoplantar and gingival hyperkeratosis except one. Which one is the exception?

Accepted Answer

A)  Marked hyperkeratosis follows the normal contour of the gingiva. 
B)  The free gingiva is highly affected with hyperkeratosis. 
C)  Oral changes start in childhood and increase with age. 
D)  Oral hyperkeratinization is bandlike and a few millimeters in width. 
A)  Marked hyperkeratosis follows the normal contour of the gingiva. 
B)  The free gingiva is highly affected with hyperkeratosis. 
C)  Oral changes start in childhood and increase with age. 
D)  Oral hyperkeratinization is bandlike and a few millimeters in width.

Question 12

Hard, dense, cortical bone on the buccal aspect of the alveolar ridge near the maxillary first molar would be termed a

Accepted Answer

A)  radiolucent torus palatinus. 
B)  radiopaque torus mandibularis. 
C)  maxillary exotosis. 
D)  radiolucent exostosis. 
A)  radiolucent torus palatinus. 
B)  radiopaque torus mandibularis. 
C)  maxillary exotosis. 
D)  radiolucent exostosis.

Question 13

MATCHING
For each genetic definition below, select the corresponding genetic term from the list provided.
-Spermatozoon or ovum

Accepted Answer

A) Autosomes 
B) Gamete 
C) Locus 
D) Mutation 
E) Phenotype
F)Syndrome 
A) Autosomes 
B) Gamete 
C) Locus 
D) Mutation 
E) Phenotype
F)Syndrome

Question 14

Genes that are located at the same level in homologous chromosomes and that dictate the same functions or characteristics are termed

Accepted Answer

A)  consanguineous. 
B)  chromatids. 
C)  alleles. 
D)  precocious. 
A)  consanguineous. 
B)  chromatids. 
C)  alleles. 
D)  precocious.

Question 15

MATCHING
For each genetic definition below, select the corresponding genetic term from the list provided.
-Permanent change in the arrangement of genetic material

Accepted Answer

A) Autosomes 
B) Gamete 
C) Locus 
D) Mutation 
E) Phenotype
F)Syndrome 
A) Autosomes 
B) Gamete 
C) Locus 
D) Mutation 
E) Phenotype
F)Syndrome

Question 16

A mother who is a carrier of an X-linked recessive trait has a 50% risk of giving birth to a(n)

Accepted Answer

A)  affected son or daughter. 
B)  carrier son or daughter. 
C)  affected son or a carrier daughter. 
D)  carrier son or an affected daughter. 
A)  affected son or daughter. 
B)  carrier son or daughter. 
C)  affected son or a carrier daughter. 
D)  carrier son or an affected daughter.

Question 17

Which syndrome is characterized by intestinal polyps, which become malignant at age 30 and after?

Accepted Answer

A)  Osteogenesis imperfecta 
B)  Nevoid basal cell carcinoma syndrome 
C)  Mandibulofacial dysostosis 
D)  Gardner syndrome 
A)  Osteogenesis imperfecta 
B)  Nevoid basal cell carcinoma syndrome 
C)  Mandibulofacial dysostosis 
D)  Gardner syndrome

Question 18

Which statement is correct concerning chromosomes?

Accepted Answer

A)  Chromosomes are located in the of the cell. 
B)  Mature germ cells (ova and spermatozoa) contain 46 chromosomes. 
C)  Chromosomes can only be seen clearly under a microscope when the nucleus and cell are dividing. 
D)  Chromosomes contain RNA, which directs the production of amino acids, polypeptides, and proteins by the cell. 
A)  Chromosomes are located in the of the cell. 
B)  Mature germ cells (ova and spermatozoa) contain 46 chromosomes. 
C)  Chromosomes can only be seen clearly under a microscope when the nucleus and cell are dividing. 
D)  Chromosomes contain RNA, which directs the production of amino acids, polypeptides, and proteins by the cell.

Question 19

Characteristic radiographic oral findings of hypophosphatemic vitamin D-resistant rickets include

Accepted Answer

A)  obliterated pulp chambers. 
B)  large pulp chambers with very long pulp horns. 
C)  normal pulp chambers with nonexistent roots. 
D)  large pulp chambers with nonexistent pulp horns. 
A)  obliterated pulp chambers. 
B)  large pulp chambers with very long pulp horns. 
C)  normal pulp chambers with nonexistent roots. 
D)  large pulp chambers with nonexistent pulp horns.

Question 20

Cyclic neutropenia is

Accepted Answer

A)  characterized by episodes that generally persist for 21 to 27 days. 
B)  characterized by oral manifestations consisting of severe ulcerative gingivitis or gingivostomatitis. 
C)  caused by a deletion on the long arm of chromosome 11 regions 14-21. 
D)  inherited as an autosomal recessive condition. 
A)  characterized by episodes that generally persist for 21 to 27 days. 
B)  characterized by oral manifestations consisting of severe ulcerative gingivitis or gingivostomatitis. 
C)  caused by a deletion on the long arm of chromosome 11 regions 14-21. 
D)  inherited as an autosomal recessive condition.

Which disorder affecting the jaw bones and facies is characterized by fusion of the anterior portion of the maxillary gingiva to the upper lip from canine to canine?

Which statement is true regarding management of patients with cyclic neutropenia?

A codon in DNA is formed by a sequence of _____ bases.

In DNA a sequence of thymine, adenine, and cytosine (TAC) is always matched by

A patient with unilateral or bilateral aplasia of the clavicles will have which characteristics?

Gingival and periodontal disease has been reported in _____% of individuals with Down syndrome.

Features of second meiosis include

The basic defect found with radicular dentin dysplasia lies in the

For each clinical syndrome below, select the corresponding chromosomal abnormality from the list provided. -Cri du chat

Most cases of Down syndrome are associated with

Each statement is true regarding focal palmoplantar and gingival hyperkeratosis except one. Which one is the exception?

Hard, dense, cortical bone on the buccal aspect of the alveolar ridge near the maxillary first molar would be termed a

MATCHING For each genetic definition below, select the corresponding genetic term from the list provided. -Spermatozoon or ovum

Genes that are located at the same level in homologous chromosomes and that dictate the same functions or characteristics are termed

MATCHING For each genetic definition below, select the corresponding genetic term from the list provided. -Permanent change in the arrangement of genetic material

A mother who is a carrier of an X-linked recessive trait has a 50% risk of giving birth to a(n)

Which syndrome is characterized by intestinal polyps, which become malignant at age 30 and after?

Which statement is correct concerning chromosomes?

Characteristic radiographic oral findings of hypophosphatemic vitamin D-resistant rickets include

Cyclic neutropenia is

Introduction to Preliminary Diagnosis of Oral Lesions

Inflammation and Repair

Immunity and Immunologic Oral Lesions

Infectious Diseases

Developmental Disorders

Neoplasia

Nonneoplastic Diseases of Bone

Oral Manifestations of Systemic Diseases

Orofacial Pain and Diseases Affecting the Temporomandibular Joint

Filters

Exam 6: Genetics

Which disorder affecting the jaw bones and facies is characterized by fusion of the anterior portion of the maxillary gingiva to the upper lip from canine to canine?

Which statement is true regarding management of patients with cyclic neutropenia?

A codon in DNA is formed by a sequence of _____ bases.

In DNA a sequence of thymine, adenine, and cytosine (TAC) is always matched by

A patient with unilateral or bilateral aplasia of the clavicles will have which characteristics?

Gingival and periodontal disease has been reported in _____% of individuals with Down syndrome.

Features of second meiosis include

The basic defect found with radicular dentin dysplasia lies in the

For each clinical syndrome below, select the corresponding chromosomal abnormality from the list provided. -Cri du chat

Most cases of Down syndrome are associated with

Each statement is true regarding focal palmoplantar and gingival hyperkeratosis except one. Which one is the exception?

Hard, dense, cortical bone on the buccal aspect of the alveolar ridge near the maxillary first molar would be termed a

MATCHING For each genetic definition below, select the corresponding genetic term from the list provided. -Spermatozoon or ovum

Genes that are located at the same level in homologous chromosomes and that dictate the same functions or characteristics are termed

MATCHING For each genetic definition below, select the corresponding genetic term from the list provided. -Permanent change in the arrangement of genetic material

A mother who is a carrier of an X-linked recessive trait has a 50% risk of giving birth to a(n)

Which syndrome is characterized by intestinal polyps, which become malignant at age 30 and after?

Which statement is correct concerning chromosomes?

Characteristic radiographic oral findings of hypophosphatemic vitamin D-resistant rickets include

Cyclic neutropenia is

Introduction to Preliminary Diagnosis of Oral Lesions

Inflammation and Repair

Immunity and Immunologic Oral Lesions

Infectious Diseases

Developmental Disorders

Neoplasia

Nonneoplastic Diseases of Bone

Oral Manifestations of Systemic Diseases

Orofacial Pain and Diseases Affecting the Temporomandibular Joint

Filters