Question 1

Which of the following disorders is a trinucleotide repeat disorder?

Accepted Answer

A)  Marfan syndrome
B)  sickle-cell disease
C)  cystic fibrosis
D)  Tay-Sachs disease
E)  Huntington diseaseF) A) and C)
G) B) and D)

Question 2

Which of the following is a dominant allele?

Accepted Answer

A)  A
B)  a
C)  AA
D)  ab
E)  AbF) B) and C)
G) None of the above

Question 3

Can a woman with an X-linked recessive disorder have normal sons?

Accepted Answer

No,all of her sons ...

Question 4

Which of the following disorders is caused by a defect in the production of an elastic connective tissue protein called fibrillin?

Accepted Answer

A)  cystic fibrosis
B)  Tay-Sachs disease
C)  Marfan syndrome
D)  Huntington disease
E)  sickle-cell diseaseF) B) and E)
G) C) and E)

Question 5

Which of the following genotypes is heterozygous?

Accepted Answer

A)  Aa
B)  Ab
C)  aB
D)  ab
E)  aaF) A) and B)
G) B) and C)

Question 6

Julie has a genetic disorder.Julie and her husband,Shane,have three children,none of which have the genetic disorder.How is this disorder most likely inherited?

Accepted Answer

A)  autosomal dominant.
B)  autosomal recessive.
C)  heterozygous dominant.
D)  The environment influences the trait instead of the genetics.
E)  100% inheritance from the father since the children are not affected.F) A) and D)
G) C) and D)

Question 7

Even though sickle-cell disease is inherited as an autosomal recessive disorder,the heterozygote can express some variation of the recessive phenotype.

Accepted Answer

A) True 
 B)False

Question 8

List the genotypic ratios of the cross between a man with O blood type and a woman who is heterozygous B blood type.

Accepted Answer

Man's genotype is ii.The woman...

Question 9

Which of the following is not a characteristic of an autosomal dominant disorder pedigree?

Accepted Answer

A)  Affected children will usually have unaffected parents.
B)  Heterozygotes are affected.
C)  Two affected parents can produce an unaffected child.
D)  Both males and females are affected with equal frequency.
E)  Two unaffected parents will not have affected children.F) A) and E)
G) B) and E)

Question 10

Which of the following is not a characteristic of an autosomal recessive disorder pedigree?

Accepted Answer

A)  Heterozygotes have an affected phenotype.
B)  Affected children can have unaffected parents.
C)  Two affected parents will always have affected children.
D)  Both males and females are affected with equal frequency.
E)  Affected individuals with homozygous unaffected mates will have unaffected children.F) C) and E)
G) All of the above

Question 11

The definition of a multifactorial trait is one in which more than one set of alleles is involved in which the environment plays no role.

Accepted Answer

A) True 
 B)False

Question 12

If the mother's genotype is aa,all of her eggs will be identical for this trait.

Accepted Answer

A) True 
 B)False

Question 13

Which of the following traits/disorders is controlled by multiple genes?

Accepted Answer

A)  skin color
B)  Tay-Sachs disease
C)  ABO blood type
D)  familial hypercholesterolemia
E)  curly hairF) A) and B)
G) B) and E)

Question 14

Of the three possible alleles for the ABO blood type,each individual can have how many?

Accepted Answer

A)  one
B)  two
C)  three
D)  none
E)  half an alleleF) A) and B)
G) B) and D)

Question 15

Dad has a genotype of AaBb.How many different kinds of sperm can he produce?

Accepted Answer

A)  one
B)  two
C)  three
D)  four
E)  fiveF) A) and D)
G) C) and D)

Question 16

In a cross of Ss x Ss,the probability of having a heterozygous genotype is

Accepted Answer

A)  1/4.
B)  1/3.
C)  1/2.
D)  2/3.
E)  3/4.F) A) and B)
G) C) and D)

Question 17

If an individual has the A blood type,how many different genotypes can they possess?

Accepted Answer

A)  one
B)  two
C)  three
D)  four
E)  fiveF) D) and E)
G) All of the above

Question 18

Is it possible for a man with type O blood to be the father of a child with type A blood?

Accepted Answer

Yes,if the mother h...

Question 19

Which of the following designations indicates a sex-linked trait?

Accepted Answer

A)  A
B)  IA
C)  XB
D)  a
E)  iF) B) and C)
G) A) and D)

Question 20

Which of the following represents a cross to determine if an individual is homozygous or heterozygous dominant?

Accepted Answer

A)  Aa x aa
B)  AA x AA
C)  aa x aa
D)  Aa x AA
E)  Aa x AaF) B) and E)
G) B) and C)

Exam 21: Patterns of Genetic Inheritance

If an individual has the A blood type,how many different genotypes can they possess?

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Which of the following traits/disorders is controlled by multiple genes?

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Which of the following designations indicates a sex-linked trait?

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Which of the following represents a cross to determine if an individual is homozygous or heterozygous dominant?

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Even though sickle-cell disease is inherited as an autosomal recessive disorder,the heterozygote can express some variation of the recessive phenotype.

Correct AnswerverifiedShow Answer

The definition of a multifactorial trait is one in which more than one set of alleles is involved in which the environment plays no role.

Correct AnswerverifiedShow Answer

In a cross of Ss x Ss,the probability of having a heterozygous genotype is

Correct AnswerverifiedShow Answer

Can a woman with an X-linked recessive disorder have normal sons?

Correct Answerverified No,all of her sons ...View AnswerShow Answer

List the genotypic ratios of the cross between a man with O blood type and a woman who is heterozygous B blood type.

Correct AnswerverifiedMan's genotype is ii.The woman...View AnswerShow Answer

Which of the following is a dominant allele?

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Which of the following disorders is a trinucleotide repeat disorder?

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Dad has a genotype of AaBb.How many different kinds of sperm can he produce?

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If the mother's genotype is aa,all of her eggs will be identical for this trait.

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Which of the following disorders is caused by a defect in the production of an elastic connective tissue protein called fibrillin?

Correct AnswerverifiedShow Answer

Of the three possible alleles for the ABO blood type,each individual can have how many?

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Is it possible for a man with type O blood to be the father of a child with type A blood?

Correct Answerverified Yes,if the mother h...View AnswerShow Answer

Which of the following is not a characteristic of an autosomal recessive disorder pedigree?

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Julie has a genetic disorder.Julie and her husband,Shane,have three children,none of which have the genetic disorder.How is this disorder most likely inherited?

Correct AnswerverifiedShow Answer

Which of the following genotypes is heterozygous?

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Which of the following is not a characteristic of an autosomal dominant disorder pedigree?

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No,all of her sons ...
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Man's genotype is ii.The woman...
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Yes,if the mother h...
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