Question 1

There is a single gene that controls the ability to taste PTC paper.The ability to taste is dominant to the inability to taste.If you can taste the paper,it is very bitter.Which of the following genotypes can taste the paper?

Accepted Answer

A)   only PP
B)   both PP and Pp
C)   both PP and pp
D)   only Pp
E)   only ppF) All of the above
G) B) and E)

Question 2

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

Accepted Answer

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

Question 3

What is the genotype of a person with type O blood?

Accepted Answer

A)   IAIA
B)   IAIB
C)   IAi
D)   IBi
E)   iiF) C) and E)
G) A) and E)

Question 4

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) A) and B)

Question 5

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 B)
G) A) and C)

Question 6

In a pedigree,an affected male would be designated by

Accepted Answer

A)   an open circle.
B)   a shaded circle.
C)   an open square.
D)   a shaded square.
E)   a square with a line through it.F) B) and E)
G) A) and D)

Question 7

A male receives his X linked alleles from his

Accepted Answer

A)   mother.
B)   father.C) A) and B)
D) undefined

Question 8

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

Question 9

In a cross of Ff x Ff,the probability of having a dominant phenotype is

Accepted Answer

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

Question 10

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) A) and B)
F) A) and C)

Question 11

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

Accepted Answer

A)   one
B)   two
C)   three
D)   four
E)   fiveF) B) and C)
G) None of the above B

Question 12

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

Accepted Answer

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

Question 13

There are two different alleles for the number of fingers on the hands: 5 finger allele and 6 finger allele.When both the 5 finger allele and the 6 finger allele are present in the same individual,the individual has 6 fingers on the hands.Which allele is dominant?

Accepted Answer

A)   5 fingers
B)   6 fingersC) A) and B)
D) undefined

Question 14

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

Question 15

Which of the following is a dominant allele?

Accepted Answer

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

Question 16

The definition of a multifactorial trait is one in which more than one set of alleles is involved.

Accepted Answer

A) True 
 B)False

Question 17

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

Accepted Answer

A) True 
 B)False

Question 18

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 E)
G) None of the above E

Question 19

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

Question 20

If a person with type B blood marries a person with type A blood,what phenotypes can their children be?

Accepted Answer

A)   all type A
B)   all type B
C)   types A and O
D)   types B and O
E)   all 4 typesF) B) and E)
G) None of the above

Exam 20: Patterns of Genetic Inheritance

There is a single gene that controls the ability to taste PTC paper.The ability to taste is dominant to the inability to taste.If you can taste the paper,it is very bitter.Which of the following genotypes can taste the paper?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What is the genotype of a person with type O blood?

Correct AnswerverifiedShow Answer

Which of the following represents a dihybrid cross?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

In a pedigree,an affected male would be designated by

Correct AnswerverifiedShow Answer

A male receives his X linked alleles from his

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

In a cross of Ff x Ff,the probability of having a dominant phenotype is

Correct AnswerverifiedE

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedB

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

Correct AnswerverifiedShow Answer

There are two different alleles for the number of fingers on the hands: 5 finger allele and 6 finger allele.When both the 5 finger allele and the 6 finger allele are present in the same individual,the individual has 6 fingers on the hands.Which allele is dominant?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following is a dominant allele?

Correct AnswerverifiedShow Answer

The definition of a multifactorial trait is one in which more than one set of alleles is involved.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following disorders is a trinucleotide repeat disorder?

Correct AnswerverifiedE

Which of the following traits would not be considered multifactorial?

Correct AnswerverifiedShow Answer

If a person with type B blood marries a person with type A blood,what phenotypes can their children be?

Correct AnswerverifiedShow Answer

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E

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B

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E

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