Question 1

Which of the following genotypes is heterozygous?

Accepted Answer

A)   Aa
B)   Ab
C)   aB
D)   ab
E)   aaF) None of the above
G) All of the above

Question 2

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

Accepted Answer

A) True 
 B)False

Question 3

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

Accepted Answer

A) True 
 B)False

Question 4

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

Accepted Answer

A)   5 fingers
B)   6 fingers
C)   1 finger
D)   11 fingers
E)   7 fingersF) A) and D)
G) B) and E)

Question 5

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. In an autosomal recessive disorder, heterozygotes have an unaffected phenotype.F) A) and D)
G) A) and E)

Question 6

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

Accepted Answer

A) True 
 B)False

Question 7

While a locus refers to a unit of heredity,a gene refers to a specific position on a chromosome.

Accepted Answer

A) True 
 B)False

Question 8

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 C)
G) A) and E)

Question 9

In a dihybrid cross,if the resulting ratios are 1:1:1:1,what are the genotypes of the parents?

Accepted Answer

A)   GgRr x ggrr
B)   GGRR x ggrr
C)   GgRr x GgRr
D)   Gg x Rr
E)   GG x RRF) D) and E)
G) C) and D)

Question 10

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

Question 11

Which of the following terms refers to the genes of an individual?

Accepted Answer

A)   genotype
B)   phenotype
C)   gamete
D)   probability
E)   autosomalF) A) and B)
G) A) and C)

Question 12

Describe the term "polygenic traits."

Accepted Answer

Polygenic traits are governed by several...

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

If two parents who are unaffected have a child that is affected,then the parents are both considered bearers.

Accepted Answer

A) True 
 B)False

Question 15

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) All of the above
G) None of the above

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

Question 17

Can two parents that have a genetic disorder ever have a normal child?

Accepted Answer

A) True 
 B)False

Question 18

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 E)
G) B) and D)

Question 19

When describing people as "lactose intolerant," you are describing

Accepted Answer

A)   their genotype.
B)   their phenotype.
C)   their alleles.
D)   their genome.
E)   none of theseF) A) and C)
G) B) and C)

Question 20

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

Accepted Answer

A) True 
 B)False

Exam 21: Patterns of Genetic Inheritance

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

Correct AnswerverifiedShow Answer

In a dihybrid cross,if the resulting ratios are 1:1:1:1,what are the genotypes of the parents?

Correct AnswerverifiedShow Answer

Can two parents that have a genetic disorder ever have a normal child?

Correct AnswerverifiedShow Answer

Which of the following terms refers to the genes of an individual?

Correct AnswerverifiedShow Answer

Describe the term "polygenic traits."

Correct AnswerverifiedPolygenic traits are governed by several...View AnswerShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following genotypes is heterozygous?

Correct AnswerverifiedShow Answer

When describing people as "lactose intolerant," you are describing

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

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 AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

While a locus refers to a unit of heredity,a gene refers to a specific position on a chromosome.

Correct AnswerverifiedShow Answer

If two parents who are unaffected have a child that is affected,then the parents are both considered bearers.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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Polygenic traits are governed by several...
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