Question 1

The symptoms of PKU include __________.

Accepted Answer

A)  neurological problems
B)  characteristic gait and stance
C)  light skin and hair
D)  all of theseE) B) and D)
F) A) and B)

Question 2

Nutritional intervention can completely suppress the effects of the PKU allele.

Accepted Answer

A) True 
 B)False

Question 3

Discuss the concept of heritability.How might twin studies help us determine heritability?

Accepted Answer

Heritability is a concept that refers to...

Question 4

Mutations often have little phenotypic effect because __________.

Accepted Answer

A)  they often occur in non-coding regions
B)  codon changes are often insignificant
C)  proteins can withstand minor amino acid variations
D)  all of theseE) A) and B)
F) B) and C)

Question 5

Heritability is __________.

Accepted Answer

A)  a direct measure of specific gene's contribution to a trait
B)  a population statistic offering little specific knowledge
C)  a direct measure of how a specific environment affects a trait
D)  a way to determine if twins are MZ or DZE) A) and B)
F) A) and C)

Question 6

What is PKU and how is it inherited? Explain how PKU is as much a result of environment as it is of genetics.

Accepted Answer

PKU, or phenylketonuria, is a genetic di...

Question 7

The vast majority of mutations are probably __________.

Accepted Answer

A)  good
B)  bad
C)  neutral
D)  fatalE) All of the above
F) A) and C) C

Question 8

Mutations during meiosis are especially important because they __________.

Accepted Answer

A)  are usually lethal
B)  tend to occur in regulatory genes
C)  are inherited
D)  are more commonE) B) and C)
F) A) and D)

Question 9

Mendel's Law of Independent Assortment indicates that __________.

Accepted Answer

A)  dominant alleles suppress recessive alleles
B)  inheritance is governed by discrete particles
C)  segregating pairs of unit factors assort independently
D)  chromosomes randomly segregate into sex cellsE) A) and C)
F) C) and D)

Question 10

A gene that contains information important to initiating transcription is a __________ gene.

Accepted Answer

A)  structural
B)  regulatory
C)  coding
D)  phenotypeE) None of the above
F) A) and D)

Question 11

If the allele for type O blood is recessive and the allele for type A blood is dominant,a person with a A and O alleles would have type __________ blood.

Accepted Answer

A)  A
B)  O
C)  AO
D)  OAE) A) and D)
F) A) and C)

Question 12

A recessive allele __________.

Accepted Answer

A)  needs to be present on only one chromosome to be expressed
B)  is never expressed
C)  needs to be present on both chromosomes to be expressed
D)  occurs as a regulatory gene onlyE) A) and D)
F) A) and C)

Question 13

Pleiotropy is best defined as __________.

Accepted Answer

A)  one gene,one effect
B)  one gene having multiple phenotypic effects
C)  heritability
D)  the effect of the environment on gene actionE) C) and D)
F) B) and D)

Question 14

In the United States,legislation allowed for the involuntary sterilization of "mental defectives."

Accepted Answer

A) True 
 B)False  True

Question 15

Trinucleotide repeat diseases are caused by __________.

Accepted Answer

A)  insertion mutations
B)  autosomal recessive mutations
C)  deletion mutations
D)  point mutationsE) All of the above
F) C) and D)

Question 16

__________ is a measure of the proportion of the total variation observed in a population that can be attributed to genetics,rather than the environment.

Accepted Answer

A)  Eugenics
B)  Pleiotropy
C)  Heritability
D)  Qualitative variationE) None of the above
F) All of the above

Question 17

Mutations in are much more critical than others.

Accepted Answer

A)  non-coding regions
B)  structural genes
C)  introns
D)  RNAE) C) and D)
F) A) and B) B

Question 18

One gene can have multiple phenotypic effects.

Accepted Answer

A) True 
 B)False

Question 19

Which of the following conditions represents a neutral mutation?

Accepted Answer

A)  sickle cell disease
B)  Habsburg face
C)  Down's syndrome
D)  X-linked disordersE) A) and B)
F) B) and C)

Question 20

Using specific examples,explain the difference between autosomal recessive disorders and autosomal dominant disorders.

Accepted Answer

Autosomal recessive disorders and autoso...

Exam 4: Genetics: From Genotype to Phenotype

The symptoms of PKU include __________.

Correct AnswerverifiedShow Answer

Nutritional intervention can completely suppress the effects of the PKU allele.

Correct AnswerverifiedShow Answer

Discuss the concept of heritability.How might twin studies help us determine heritability?

Correct AnswerAnswered by ExamLex AIHeritability is a concept that refers to...View AnswerShow Answer

Mutations often have little phenotypic effect because __________.

Correct AnswerverifiedShow Answer

Heritability is __________.

Correct AnswerverifiedShow Answer

What is PKU and how is it inherited? Explain how PKU is as much a result of environment as it is of genetics.

Correct AnswerAnswered by ExamLex AIPKU, or phenylketonuria, is a genetic di...View AnswerShow Answer

The vast majority of mutations are probably __________.

Correct AnswerverifiedC

Mutations during meiosis are especially important because they __________.

Correct AnswerverifiedShow Answer

Mendel's Law of Independent Assortment indicates that __________.

Correct AnswerverifiedShow Answer

A gene that contains information important to initiating transcription is a __________ gene.

Correct AnswerverifiedShow Answer

If the allele for type O blood is recessive and the allele for type A blood is dominant,a person with a A and O alleles would have type __________ blood.

Correct AnswerverifiedShow Answer

A recessive allele __________.

Correct AnswerverifiedShow Answer

Pleiotropy is best defined as __________.

Correct AnswerverifiedShow Answer

In the United States,legislation allowed for the involuntary sterilization of "mental defectives."

Correct AnswerverifiedTrue

Trinucleotide repeat diseases are caused by __________.

Correct AnswerverifiedShow Answer

__________ is a measure of the proportion of the total variation observed in a population that can be attributed to genetics,rather than the environment.

Correct AnswerverifiedShow Answer

Mutations in are much more critical than others.

Correct AnswerverifiedB

One gene can have multiple phenotypic effects.

Correct AnswerverifiedShow Answer

Which of the following conditions represents a neutral mutation?

Correct AnswerverifiedShow Answer

Using specific examples,explain the difference between autosomal recessive disorders and autosomal dominant disorders.

Correct AnswerAnswered by ExamLex AIAutosomal recessive disorders and autoso...View AnswerShow Answer

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Heritability is a concept that refers to...
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PKU, or phenylketonuria, is a genetic di...
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C

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True

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B

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Autosomal recessive disorders and autoso...
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