Question 1

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.

Question 2

Explain the problems associated with the genetic disorder Tay-Sachs.
A. This lysosome is responsible for clearing out the fatty acids that build up in the cells of the brain. The buildup 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, paralysis, and death.

Accepted Answer

Affected children w...

Question 3

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.

Question 4

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.

Question 5

Which of the following is an example of a homozygous recessive genotype?

Accepted Answer

A)   aa
B)   Aa
C)   short
D)   AA
E)   ab

Question 6

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.

Question 7

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

Accepted Answer

A)   IAIA
B)   IAIB
C)   IAi
D)   IBi
E)   ii

Question 8

Which of the following represents a cross to determine if an individual is homozygous dominant or heterozygous?

Accepted Answer

A)   Aa x aa
B)   AA x AA
C)   aa x aa
D)   Aa x AA
E)   Aa x Aa

Question 9

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)   AA

Question 10

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

Question 11

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. B

Question 12

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)   Two unaffected parents will not have affected children.

Question 13

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 14

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 disease C

Question 15

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)   types A, B, O, and AB

Question 16

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 pp

Question 17

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 type

Question 18

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 disease
E)   All are autosomal recessive disorders.

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. A

Question 20

How is familial hypercholesterolemia inherited?

Accepted Answer

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

Exam 21: Patterns of Genetic Inheritance

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

Correct Answer
verified
Affected children w...
View 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 Answer
verified

In a pedigree,an affected male would be designated by

Correct Answer
verified

Which of the following is an example of a homozygous recessive genotype?

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

Which of the following represents a cross to determine if an individual is homozygous dominant or heterozygous?

Correct Answer
verified

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

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

How are Fragile X syndrome and Huntington disease similar?

Correct Answer
verified
B

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

Correct Answer
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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

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

Correct Answer
verified
C

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

Correct Answer
verified

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 Answer
verified

Which of the following traits would not be considered multifactorial?

Correct Answer
verified

Which of the following is not an autosomal recessive disorder?

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
A

How is familial hypercholesterolemia inherited?

Correct Answer
verified

Exam 21: Patterns of Genetic Inheritance

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

Correct Answerverified Affected children w...View AnswerShow 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 AnswerverifiedShow Answer

In a pedigree,an affected male would be designated by

Correct AnswerverifiedShow Answer

Which of the following is an example of a homozygous recessive genotype?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following represents a cross to determine if an individual is homozygous dominant or heterozygous?

Correct AnswerverifiedShow Answer

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

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 AnswerverifiedShow Answer

How are Fragile X syndrome and Huntington disease similar?

Correct AnswerverifiedB

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

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

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

Correct AnswerverifiedC

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

Correct AnswerverifiedShow Answer

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 traits would not be considered multifactorial?

Correct AnswerverifiedShow Answer

Which of the following is not an autosomal recessive disorder?

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 AnswerverifiedA

How is familial hypercholesterolemia inherited?

Correct AnswerverifiedShow Answer

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Correct Answer
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Affected children w...
View Answer

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B

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C

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A

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