Question 1

When describing someone as "lactose intolerant",you are describing their

Accepted Answer

A)   genotype.
B)   phenotype.C) A) and B)
D) undefined

Question 2

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 3

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 4

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 recessiveC) A) and B)
D) undefined

Question 5

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) None of the above
G) A) and E)

Question 6

Which of the following is not an autosomal recessive disorder?

Accepted Answer

A)   Marfan syndrome
B)   Tay-Sachs disease
C)   cystic fibrosis
D)   sickle cell diseaseE) A) and C)
F) All of the above

Question 7

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

Accepted Answer

NO
Explanation: No, all of her...

Question 8

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

Accepted Answer

A)   one
B)   two
C)   threeD) B) and C)
E) A) and C)

Question 9

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

Question 10

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

Accepted Answer

A) True 
 B)False

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) C) and D)

Question 12

An allele is to a gene,as a locus is to a

Accepted Answer

A)   gamete.
B)   phenotype.
C)   chromosome.
D)   genotype.
E)   unit of heredity.F) None of the above
G) A) and C)

Question 13

Which of the following individuals has a recessive phenotype?

Accepted Answer

A)   AA
B)   Aa
C)   AaBb
D)   aabbE) A) and B)
F) C) and D)

Question 14

Clasp your hands together (without thinking about it) .Which thumb is on top? The dominant phenotype is left thumb on top.If you have the genotype "tt",which thumb is on top?

Accepted Answer

A)   left
B)   rightC) A) and B)
D) undefined

Question 15

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

Question 17

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

Accepted Answer

A)   Fragile X
B)   Duchenne's
C)   color blindness
D)   hemophiliaE) All of the above
F) B) and C)

Question 18

In a dihybrid cross,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) A) and E)
G) B) and D)

Question 19

There is a trait with two alleles.One allele codes for blue while the other allele codes for yellow.If this trait is inherited in a codominant manner,what color will the offspring be?

Accepted Answer

A)   blue
B)   yellow
C)   green
D)   blue and yellow stripedE) A) and B)
F) A) and C)

Question 20

Can a man with type O blood be the father of a child with type A blood?

Accepted Answer

YES
Explanation: Yes...

Exam 20: Patterns of Genetic Inheritance

Clasp your hands together (without thinking about it) .Which thumb is on top? The dominant phenotype is left thumb on top.If you have the genotype "tt",which thumb is on top?

Correct AnswerverifiedShow Answer

There is a trait with two alleles.One allele codes for blue while the other allele codes for yellow.If this trait is inherited in a codominant manner,what color will the offspring be?

Correct AnswerverifiedShow Answer

How are Fragile X syndrome and Huntington disease similar?

Correct AnswerverifiedShow Answer

Can a man with type O blood be the father of a child with type A blood?

Correct AnswerverifiedYESExplanation: Yes...View AnswerShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedNOExplanation: No, all of her...View AnswerShow Answer

Which of the following is not an autosomal recessive disorder?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

In a dihybrid cross,what is the probability that the offspring will exhibit both of the dominant phenotypes?

Correct AnswerverifiedShow Answer

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

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

An allele is to a gene,as a locus is to a

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

When describing someone as "lactose intolerant",you are describing their

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

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

Correct AnswerverifiedShow Answer

Which of the following individuals has a recessive phenotype?

Correct AnswerverifiedShow Answer

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YES
Explanation: Yes...
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NO
Explanation: No, all of her...
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