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Advanced Patho Quiz 3&4 – Questions & Solutions
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Advanced Patho Quiz 3&4 – Questions & Solutions
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Advanced Patho Quiz 3&4 – Questions & SolutionsWhile explaining the individual differences in physical traits in any given
family group, the health care provider states this is usually a result of:
✔️Ans - Small DNA sequencing variation
Because there are 20 possible amino acids and only four bases, there are 64
possible combinations. This variation allows the differences in physical
traits in family members.
Which of the following statements is true of messenger RNA (mRNA)?
✔️Ans - mRNA provides the template for protein synthesis.
Genetic disorders that involve a single-gene trait are characterized by:
✔️Ans - Mendelian patterns of transmission
What occurs when a male child inherits an X-linked abnormal chromosome
from his heterozygous carrier mother? ✔️Ans - He will be affected by the
disorder.
An example of aneuploidy resulting from nondisjuction is ✔️Ans - Down
syndrome
Neurofibromatosis disease is an autosomal dominant, inherited condition.
Some people who inherit the gene may have a mild expression of the
disease and others more moderate or severe expression. Explain why this
is so. ✔️Ans - Your answer should include a discussion of the terms
penetrance and expressivity.
(1pt) Penetrance represents the ability of a gene to express its function.
Penetrance is stated in percentage. Each disorder/disease is assigned a
formal percentage for penetrance. Some diseases/disorders are 100%
penetrance. This means that 100% of those with that disease/disorder
genotype will display the phenotype or the outcome of it. Other
diseases/disorders have much lower penetrance percentages.
(1pt) Expressivity refers to the manner in which the gene is expressed in
the phenotype, which can range from mild to severe. There are differing
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