OB II Ch: 6 Genetics Review Question

The karyotype of a patient with Turner syndrome shows:

44 autosomes and XO

All of the following are involved in cherubim except one. Which one is the exception? A. Coronoid process B. Condyle C. Posterior mandible D. Ascending ramus

B. Condyle

patients with hypophosphatasia characteristically have?

absence of root cementum

Hypotrichosis means ?

decreased amount of hair

the cause of all forms of labial and palatal cleating is considered to be ?

multifactorial

Odontogenic keratocysts are a clinical component of ?

nevoid basal cell carcinoma syndrome

Barr bodies are seen at the ?

nuclear periphery of all cells in women

Hypothetically, an autosomal dominant trait would be clinically present in ?

50 % of the offspring of an affected parent

Trisomy refers to ?

A pair of chromosomes with an identical extra chromosome

Which one of the following is true for von Recklinghausen disease? A. Patients may have gingival neurofibromas B. It is inherited as an autosomal-recessive trait C. patients experience a generalized whitening of the oral mucosa D. Patients habe multiple fibromatoses

A. Patients may have gingival neurofibromas

a 14 year old by is seen in consultation because of bilateral mandibular swelling. Radiographs show a bilateral multilocular lesion in the ascending mandibular rami. The mother of this patient has similar findings. the most likely diagnosis is ?

Cherubism

In which one of the following conditions can the shoulders be brought forward tot he midline due to hypo plastic clavicles?

Cleidocranial dysplasia

Which is the most serious component of Gardner Syndrome?

Colorectal polyposis

All the following are characteristics of cherubim except one. Which one is the exception? A. Pseudoanodontia B. Autosomal dominant C. Ocular hypertelorism D. Autosomal recessive

D. autosomal recessive

Which one of the following is associated with cyclic neutrophila?

Diminished number of circulating neitrophils

Patients with hypohidrotic ectodermal dysplasia characteristically have ?

Hypodontia

Which one of the following is characteristically associated with teeth with large pulp chambers?

Hypophasphatasia

The so called "animal agencies" os one of which type of amelogenesis imperfecta?

Hypoplastic

Which is characteristically associated with oral ulcerations?

Kostmann Syndrome

Which one of the following is a component of the Peutz-Jeghers syndrome?

Multiple pigmented macules on the lower lip and mucosa

A 9 year old boy exhibits markedly swollen red and bleeding gingiva. In addition, he has tooth mobility, and the intraoral radiographs show marked alveolar bone atrophy with vertical periodontal pockets. Which if the following will be found in this chid if he were to have Papillon-Lefevre syndrome?

Palmar and plantar hyperkeratosis

Radiographs of a patient with radicular dentin dysplasia shows ?

Pulp chamber with a half moon appearance

A 19 year old women is diagnosed with cleidocranial dysplasia. She has absent clavicles and a mushroom shaped skull. Which of the following conditions is she most likely to have?

Supernumerary teeth

Which one of the following statements is true when comparing cyclic neutriphila and Kostmann syndrome?

The oral lesions in Kostmann syndrome are always present unless systemic treatment is instituted

The lyon hypothesis is demonstrated by ?

X-linked dominant traits

Karyotype refers to ?

a microphotograph showing a persons chromosomes from a single cell

Patient with an X-linked hereditary condition ?

are generally affected more severely if they are men

Taurodontic teeth ?

are pyramidal in shape

the papillon-lafevre syndrome is inherited according to an ?

autosomal recessive pattern

the constriction that joins the short and long arms of each chromosome is called ?

centromere

in all inherited varieties of gingival fibromatosis, the gingival enlargement is characterized by a marked?

collagenization of the connective tissue

The most frequent site of hemorrhage in patients with hereditary hemorrhagic telangiectasia is the ?

gingiva

The major concern for a dental hygienist when treating a patient with Osler-Rendu-Parkes Weber syndrome should be ?

gingival hemorrhage

Two characteristic clinical components of mandibulofacial dysostosis are ?

hypoplastic mandible and deafness

torus mandibularis and torus palatinus are ?

inherited as an autosomal dominant trait

the most frequently exfoliated teeth in patients with hypophosphatasia are ?

maxillary primary incisors

Which one of the following is typically found in the men 2B syndrome?

pheochromocytoma

In dentinogenesis imperfecta type 2, teeth have ?

roots that are short and thin

the characteristic finding in permanent teeth affected with coronal dentin dysplasia is ?

thistle-shaped pulp chambers in incisors

snow capped amelogenesis imperfecta have teeth with ?

white hypo calcified enamel at the incisal occlusal thirds

Cannon disease is also known as ?

white sponge nevus