Review questions chapter 6 Flashcards
All congenital disorders are hereditary
False
These types of disorders are derived from ones parents (common names none specific)
Familial/Hereditary
These disorders are typically present at birth
Congenital
What involves the substitution of a single nucleotide base that results in the coding for
a stop codon?
Point mutations
These mutations mutations interrupt translation, and in most cases RNAs are rapidly degraded, a phe- nomenon called nonsense mediated decay, such that little or no protein is formed.
Nonsense
These mutations occur when the insertion or deletion of one or two base pairs alters the reading frame of the DNA strand.
Frameshift mutations
These mutations belong to a special cate- gory, because these mutations are characterized by amplification of a sequence of three nucleotides.
Trinucleotide repeat mutations
Which of the following conditions is an example of a hereditary condition that is not congenital?
Muscular dystrophy
Autosomal recessive conditions typically express phenotypic changes in the ___________ state.
Homozygous
What are the chances of an offspring of two parents, whom are both heterozygote asymptomatic for a disorder, to be affected or present said disease?
25%
Which of the following is the result of a mutation in the FBN1 gene encoding fibrillin?
Marfan syndrome
________are a group of diseases characterized by defects in collagen synthesis or structure.
Ehler Danlos
These are the most common variants of Ehler Danlos
Deficiency of the enzyme lysyl hydroxylase., Deficient synthesis of type III collagen resulting from muta- tions affecting the COL3A1 gene., and Deficient synthesis of type V collagen due to mutations in COL5A1 and COL5A2
What is the most common familial disorder?
Familial hypercholesterolemia
Which area of the body is not commonly affected by Marfan syndrome?
Colon
Death from a(n) __________ is the most common cause of death among individuals with Marfan
syndrome. (
Aortic rupture/ Ruptured aortic aneurysm
Isaiah Austin (shown to the right) was unable to play in the NBA because he was diagnosed with \_\_\_\_\_\_\_\_, which increases the risk of ectopia lentis and a lethal aortic dissection.
Marfan syndrome
Most contortionists are believed to have a form of _____________.
Ehler Danlos
______is the most common lethal genetic disease that affects white populations. This disease is also Autosomal recessive
Cystic Fibrosis
Familial hypercholesterolemia involves a mutation in the LDLR gene and is present in 1 out of every
______ individuals.
500
Individuals that are homozygous for familial hypercholesterolemia commonly die of _________ before
the age of 20 years.
Myocardial infarction
Homozygotes have a greater risk
Children who lack phenylalanine hydroxylase will develop _________ if untreated early in life.
Mental Retardation
Phenylketonuria symptom
Treatment of galactosemia may prevent many of the pathological effects of the condition, but ______
disorders may remain
Speech
Which patient population is most likely to be impacted by a lysosomal storage disease?
Infants and young children
Which condition involves the accumulation of GM2 gangliosides within neurons and results in mental
retardation?
Tay Sachs
_____results from mutation in the gene that encodes glucocerebrosidase and is also cause by activation of macrophages
Gaucher disease
______ an autosomal recessive disorder of galac- tose metabolism that affects 1 in 60,000 live-born infants. The liver, eyes, and brain bear the brunt of the damage in this disease
Galactosemia
______ has hepatomegaly as a common symptom
Galactosemia
Which of the following conditions commonly manifests with results in coarse facial features and corneal
clouding?
Mucopolysaccharidosis
this disease manifests in childhood and is marked by ataxia, verti- cal supranuclear gaze palsy, dystonia, dysarthria, and psy- chomotor regression.
Niemann pick Type C
____ and ____ disease are related enti- ties characterized by a primary deficiency of acid sphingo- myelinase and the resultant accumulation of sphingomyelin. Death is usually around the age of 3
Niemann pick type A and B
Type ___ niemann pick patients have organomegaly but no neurologic manifestations
B
von Gierke disease is a ___________ of glycogen storage disease
Hepatic type
McArdle Syndrome is a type of _____ of glycogen storage disease
Myopathic
Von gierke mainly affects
Liver and kidneys
McArdle typically affects the
Skeletal muscle
Which glycogen storage disease manifests with cardiomegaly that may progress to cardiorespiratory
failure?
Pompe Disease (miscellaneous type)