Question 1

Explain the problems associated with the genetic disorder Tay-Sachs.
A. This lysosome is responsible for clearing out the fatty acid proteins that build up in the cells of the brain. The build up begins to interfere with proper brain development and growth. This leads to malfunctions in vision, movement, hearing, and overall mental development. The impairment leads to blindness, seizures, and paralysis.

Accepted Answer

Tay-Sachs is an autosomal recessive diso...

Question 2

How are Fragile X syndrome and Huntington disease similar?

Accepted Answer

A)   Both exhibit a late onset in life.
B)   Both are trinucleotide repeat expansion disorders.
C)   Both affect the muscles and lead to eventual paralysis.
D)   Both cause autism.
E)   Both are found only in males.F) A) and B)
G) None of the above

Question 3

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 4

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  True

Question 5

If a mother is a carrier for color-blindness and her husband is not, which of the following children are most likely?

Accepted Answer

A)   1 normal daughter, 1 carrier daughter, 1 normal son, and 1 color-blind son
B)   2 normal daughters, 1 normal son, and 1 color-blind son
C)   2 carrier daughters, 1 normal son, and 1 color-blind son
D)   1 normal daughter, 1 carrier daughter, and 2 normal sons
E)   1 normal daughter, 1 carrier daughter, and 2 color-blind sonsF) D) and E)
G) All of the above

Question 6

Which of the following traits would not be considered multifactorial?

Accepted Answer

A)   alcoholism
B)   suicide risk
C)   cleft lip/palate
D)   diabetes
E)   ABO blood typeF) B) and D)
G) B) and C)

Question 7

Which of the following represents a dihybrid cross?

Accepted Answer

A)   ff x ff
B)   Gg x gg
C)   AAbb x Aabb
D)   AAbb x aaBB
E)   Ss x ssF) B) and D)
G) B) and C)

Question 8

Which of the following is a dominant allele?

Accepted Answer

A)   A
B)   a
C)   AA
D)   ab
E)   AbF) D) and E)
G) A) and B)

Question 9

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) All of the above
G) A) and E)

Question 10

Which of the following is not a characteristic of an X-linked recessive disorder pedigree?

Accepted Answer

A)   An affected son can have normal parents.
B)   If a female has the trait, her father must also have it.
C)   The characteristic often skips a generation.
D)   More females than males are affected.
E)   If a woman has the characteristic, all of her sons will have it.F) B) and C)
G) C) and E) D

Question 11

Which of the following genotypes is heterozygous?

Accepted Answer

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

Question 12

In a dihybrid cross, in which both parents are heterozygous for both traits, what is the probability that the offspring will exhibit both of the dominant phenotypes?

Accepted Answer

A)   1/16. 
B)   3/16.
C)   6/16.
D)   9/16.
E)   1.F) B) and E)
G) B) and D)

Question 13

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) C) and E)
G) A) and B)

Question 14

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 woma...

Question 15

Which of the following traits is an X-linked recessive disorder?

Accepted Answer

A)   Color blindness
B)   Tay-Sachs
C)   Cystic fibrosis
D)   Sickle-cell disease
E)   Marfan syndromeF) A) and E)
G) B) and E)

Question 16

Probability calculations in which the word "or" is used involve the product rule.

Accepted Answer

A) True 
 B)False

Question 17

If you want to know the probability that tossing two coins will result in a particular outcome (two heads, for example) , you use the

Accepted Answer

A)   product rule.
B)   sum rule.
C)   punnett rule.
D)   Bergman's rule.
E)   genetics rule.F) A) and D)
G) A) and C) A

Question 18

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) A) and B)
G) A) and C)

Question 19

In a cross of a homozygous dominant parent and a homozygous recessive parent, what is the ratio of offspring that will exhibit the recessive phenotype?

Accepted Answer

A)   0.
B)   1/4.
C)   1/2.
D)   3/4.
E)   1.F) B) and E)
G) C) and D)

Question 20

Which of the following genetic disorders is due to a lack of the lysosome enzyme hex A?

Accepted Answer

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

Exam 20: Patterns of Genetic Inheritance

Correct Answer
verified
Tay-Sachs is an autosomal recessive diso...
View Answer

How are Fragile X syndrome and Huntington disease similar?

Correct Answer
verified

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 Answer
verified

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

Correct Answer
verified
True

If a mother is a carrier for color-blindness and her husband is not, which of the following children are most likely?

Correct Answer
verified

Which of the following traits would not be considered multifactorial?

Correct Answer
verified

Which of the following represents a dihybrid cross?

Correct Answer
verified

Which of the following is a dominant allele?

Correct Answer
verified

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

Correct Answer
verified

Which of the following is not a characteristic of an X-linked recessive disorder pedigree?

Correct Answer
verified
D

Which of the following genotypes is heterozygous?

Correct Answer
verified

In a dihybrid cross, in which both parents are heterozygous for both traits, what is the probability that the offspring will exhibit both of the dominant phenotypes?

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified
Man's genotype is ii. The woma...
View Answer

Which of the following traits is an X-linked recessive disorder?

Correct Answer
verified

Probability calculations in which the word "or" is used involve the product rule.

Correct Answer
verified

If you want to know the probability that tossing two coins will result in a particular outcome (two heads, for example) , you use the

Correct Answer
verified
A

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

Correct Answer
verified

In a cross of a homozygous dominant parent and a homozygous recessive parent, what is the ratio of offspring that will exhibit the recessive phenotype?

Correct Answer
verified

Which of the following genetic disorders is due to a lack of the lysosome enzyme hex A?

Correct Answer
verified

Exam 20: Patterns of Genetic Inheritance

Correct AnswerverifiedTay-Sachs is an autosomal recessive diso...View AnswerShow Answer

How are Fragile X syndrome and Huntington disease similar?

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

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

Correct AnswerverifiedTrue

If a mother is a carrier for color-blindness and her husband is not, which of the following children are most likely?

Correct AnswerverifiedShow Answer

Which of the following traits would not be considered multifactorial?

Correct AnswerverifiedShow Answer

Which of the following represents a dihybrid cross?

Correct AnswerverifiedShow Answer

Which of the following is a dominant allele?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following is not a characteristic of an X-linked recessive disorder pedigree?

Correct AnswerverifiedD

Which of the following genotypes is heterozygous?

Correct AnswerverifiedShow Answer

In a dihybrid cross, in which both parents are heterozygous for both traits, what is the probability that the offspring will exhibit both of the dominant phenotypes?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow 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 woma...View AnswerShow Answer

Which of the following traits is an X-linked recessive disorder?

Correct AnswerverifiedShow Answer

Probability calculations in which the word "or" is used involve the product rule.

Correct AnswerverifiedShow Answer

If you want to know the probability that tossing two coins will result in a particular outcome (two heads, for example) , you use the

Correct AnswerverifiedA

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

Correct AnswerverifiedShow Answer

In a cross of a homozygous dominant parent and a homozygous recessive parent, what is the ratio of offspring that will exhibit the recessive phenotype?

Correct AnswerverifiedShow Answer

Which of the following genetic disorders is due to a lack of the lysosome enzyme hex A?

Correct AnswerverifiedShow Answer

Correct Answer
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Tay-Sachs is an autosomal recessive diso...
View Answer

Correct Answer
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True

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D

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Man's genotype is ii. The woma...
View Answer

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A

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Correct Answer
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