Question 1

Which of the following X-linked recessive disorders is characterized by a degeneration of the muscles?

Accepted Answer

A)   Fragile X
B)   Duchenne
C)   color blindness
D)   hemophilia
E)   malariaF) A) and E)
G) A) and B)

Question 2

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

Question 3

Most of the sex-linked traits are found only on the X chromosome.

Accepted Answer

A) True 
 B)False

Question 4

Which of the following individuals has a recessive phenotype?

Accepted Answer

A)   AA
B)   Aa
C)   AaBb
D)   aabb
E)   aAbBF) C) and D)
G) B) and D)

Question 5

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) B) and D)
G) A) and B)

Question 6

How is familial hypercholesterolemia inherited?

Accepted Answer

A)   autosomal recessive
B)   autosomal dominant
C)   incompletely dominant
D)   codominant
E)   sex-linked dominantF) A) and B)
G) D) and E)

Question 7

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

Question 8

When you describe a person as having attached ear lobes, you are describing his or her genotype.

Accepted Answer

A) True 
 B)False

Question 9

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

Accepted Answer

The answer of Can a woman with an X-linked recessive...

Question 10

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

Question 11

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) A) and D)
G) C) and E)

Question 12

Which variable has the stronger influence on the color of an individual's skin?

Accepted Answer

A)   the individual's phenotype
B)   the amount of time spent in the sun
C)   the amount of time spent in the sun and the individual's genotype
D)   the individual's genotype
E)   Neither the sun nor the individual's genotype have any influence on the individual's skin color. Skin color is due to a combination of an individual's genotype as well as the environmental influence.F) A) and E)
G) A) and D)

Question 13

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) None of the above
G) B) and D)

Question 14

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

Question 15

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

Accepted Answer

The man's genotype is ii. The ...

Question 16

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) None of the above

Question 17

Which of the following represents the genotype of a male who is color-blind?

Accepted Answer

A)   XBXB
B)   XBXb
C)   XbXb
D)   XbY
E)   XBYF) All of the above
G) B) and C)

Question 18

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) D) and E)
G) C) and D)

Question 19

Which of the following is a dominant allele?

Accepted Answer

A)   A
B)   a
C)   AA
D)   ab
E)   AbF) All of the above
G) A) and D)

Question 20

Which of the following would not be a common/conventional way to list someone's genotype?

Accepted Answer

A)   BB
B)   Bb
C)   AB
D)   bb
E)   AAF) B) and E)
G) B) and D)

Exam 21: Patterns of Genetic Inheritance

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

Correct AnswerverifiedShow Answer

Which of the following would not be a common/conventional way to list someone's genotype?

Correct AnswerverifiedShow Answer

Which of the following X-linked recessive disorders is characterized by a degeneration of the muscles?

Correct AnswerverifiedShow Answer

Which of the following is a dominant allele?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

How are Fragile X syndrome and Huntington disease similar?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

When you describe a person as having attached ear lobes, you are describing his or her genotype.

Correct AnswerverifiedShow Answer

Which of the following disorders is a trinucleotide repeat disorder?

Correct AnswerverifiedShow Answer

Most of the sex-linked traits are found only on the X chromosome.

Correct AnswerverifiedShow Answer

Which of the following individuals has a recessive phenotype?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

How is familial hypercholesterolemia inherited?

Correct AnswerverifiedShow Answer

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 variable has the stronger influence on the color of an individual's skin?

Correct AnswerverifiedShow Answer

Which of the following represents a dihybrid cross?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedThe man's genotype is ii. The ...View AnswerShow Answer

Which of the following represents the genotype of a male who is color-blind?

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

Correct AnswerverifiedShow Answer

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The man's genotype is ii. The ...
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