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Audiology/Salus - Genetics
Genetics
52
Other
Post-Graduate
06/21/2009

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Term
A good example of how autosomal dominance works can be seen in
Definition
brown eyes and curly hair
Term
In autosomal inheritance, the odds of inheriting an AD trait or condition from one parent is 1 in 2 or 50% for each offspring, regardless of the parent or offspring's sex T/F
Definition
True
Term
In AD inheritance, there can be widely variable phenotypic presentation of traits or conditions even within the same family
T/F
Definition
True
Term
Autosomal recessive and AD inheritance involve a trait carried via
Definition
one of the chromosomes
Term
Blue eyes and straight hair are good examples of typical AR inheritance
T/F
Definition
True
Term
In AR inheritance, the odds of being an affected individual are:
Definition
25% for each offspring
Term
AD and AR inheritance are genetic mechanisms found only in the transmission of defective or mutated traits and conditions T/F
Definition
False
Term
In AD and AR mechanisms, male and female usually carry the same risk of inheritance
T/F
Definition
True
Term
In AR inheritance, the risk of carrier status for each offspring of carrier parents is 50% and the risk of being neither a carrier nor affected is 25%
T/F
Definition
True
Term
All risks for AD and AR inheritance are rarely the same for each pregnancy
T/F
Definition
False
Term
In X-linked recessive inheritance, the unaffected carriers are:
Definition
always females
Term
X-linked conditions affect both sexes to the same degree
T/F
Definition
False
Term
Females can not be affected by X-linked recessive conditions
T/F
Definition
False
Term
Male to male inheritance is common in X-linked conditions
T/F
Definition
False
Term
Each male offspring of female carriers of X-linked conditions has a 50% chance of inheritance
T/F
Definition
True
Term
Each female offspring of fathers affected by X-linked dominant conditions will be affected
T/F
Definition
True
Term
The most likely condition to be incompatible with life (often resulting in miscarriage) is found in:
Definition
X-linked dominant in males
Term
Mitochondria are found:
Definition
in every cell of the body
Term
The age of onset and severity of mitochondrial conditions are directly proportional to the amount of mutated mitochondria present in any individual
T/F
Definition
True
Term
Mitochondrial conditions:
Definition
differ among siblings in the amount of mutated mitochondria transmitted
Term
Mitochondrial diseases often result in some kind of AVS abnormality
T/F
Definition
True
Term
Mitochondria are inherited through the maternal line because male mitochondria are in the neck and tail of the sperm, which fall off at fertilization
T/F
Definition
True
Term
If the first offspring born to carrier parents is affected by an AR trait, the next offspring:
Definition
also has a 25% chance of exhibiting the AR trait, 50% chance of being a carrier and 25% chance of not inheriting those AR genes
Term
Autosomally inherited traits or conditions transmit through:
Definition
parent cells
Term
Inheriting dominant syndromes or traits requires:
Definition
one gene to inherit
Term
Recessive inheritance requires:
Definition
two genes for the same trait
Term
The AV component of complex inherited syndromes involving many organ systems is:
Definition
barely known and rarely recognized by audiologists and other healthcare providers
Term
In dominant syndromes, phenotype is:
Definition
highly variable
Term
The overall embryology of the ear is completed:
Definition
in the last phase of pregnancy
Term
Embryology timetable for the human ear is:
Definition
similar to mouse embryology
Term
Specific genes that have been shown to be related to human ear development are found also in:
Definition
mice
Term
Connective tissue as found in the human ear is:
Definition
found in several other organ systems
Term
Most of the critical connective tissue involved in the AV system derive from:
Definition
neural crest
Term
The syndromic conditions involving hearing or other auditory pathology are found primarily in those conditions associated with:
Definition
many combinations of organ system anomolies
Term
Most syndromes involving audiovestibular loss or damage are due to:
Definition
genetic transmission of mendelian traits
Term
Heritability of AV defects can be found in:
Definition
several hundred conditions and every type of AV deficit
Term
Changes in the integumentary system is highly correlated with AV defects
T/F
Definition
True
Term
Syndromes involving mid-facial structural anomalies are most likely to present with:
Definition
middle ear or mixed HL of variable severity
Term
Individuals with diffuse, progressive neurologic disorders might be likely to demonstrate abnormal:
Definition
ABR
Term
In multiple sclerosis, audiologic results are
Definition
highly variable, even within the same subject
Term
NFI and NFII are really the same disorder, even though they are found on 2 different chromosomes
T/F
Definition
False
Term
Hearing and/or balance problems are often seen in individuals with syndromes involving primarily the:
Definition
pigmentary system
Term
If a pt with HL presents with musculoskeletal symptoms, the following procedures are likely to contribute to a better understanding of the disorder:
Definition
detailed studies of middle ear function
Term
When an individual presents with stigmata suggesting HL associated with a complex syndrome, the audiologist should always:
Definition
take an in-depth family history
Term
Understanding the nature and extent of the AV system function or dysfunction will generally:
Definition
facilitate patient habilitation/rehabilitation
Term
Genetic syndromes or conditions that include AV deficits:
Definition
generally require collaboration with other healthcare providers
Term
When evaluating a pt with newly developed neurological symptoms, the audiologist must:
Definition
find out as much as possible about the conditions under consideration and select audiologic studies targeted to those possible diagnoses
Term
In managing genetic HL syndromes, the audiologist must understand:
Definition
how the AV system can herald or signal changes in other organ systems
Term
AV deficits associated with hereditary syndromic conditions characteristically:
Definition
require regular audiologic follow-up and re-examination
Term
Referring pts for special genetic studies:
Definition
may be indicated if a pt's symptoms have not yet been diagnosed
Term
Genetic experts such as clinical geneticists, etc are:
Definition
frequently important allies in the audiologic pt care and management
Term
Managing pts with genetic syndromes involving AV dysfunction will increasingly require audiologists to:
Definition
understand modern genetics and audiology's relationship with it
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