Question 1

Which of the following genotypes is heterozygous?

Accepted Answer

A)   Aa
B)   Ab
C)   aB
D)   ab
E)   aaF) B) and E)
G) B) and D)

Question 2

Which of the following represents a gamete with a dominant allele?

Accepted Answer

A)   A
B)   b
C)   AA
D)   Aa
E)   bbF) B) and C)
G) A) and C)

Question 3

When you describe a person as having attached ear lobes,you are describing their genotype.

Accepted Answer

A) True 
 B)False

Question 4

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

Question 5

Most polygenic traits show discrete phenotypes when plotted on a graph.

Accepted Answer

A) True 
 B)False

Question 6

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

Question 7

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

Question 8

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

Accepted Answer

YES
Explanation: Yes, if they ...

Question 9

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) A) and B)
D) undefined

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

If the mother's genotype is aa,all of her eggs will be identical for this trait.

Accepted Answer

A) True 
 B)False

Question 12

How is familial hypercholesterolemia inherited?

Accepted Answer

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

Question 13

In an X-linked dominant trait,affected males pass the trait only to daughters.

Accepted Answer

A) True 
 B)False

Question 14

The probability of tossing a coin and having it be heads or tails is

Accepted Answer

A)   1/4
B)   1/2
C)   1
D)   0E) A) and B)
F) B) and C)

Question 15

The square that is used to make all the possible combinations of gametes is called a Punnett square.

Accepted Answer

A) True 
 B)False

Question 16

In the inheritance of skin color example in the book,which genotype would have the same phenotype as AaBb?

Accepted Answer

A)   AABB
B)   AABb
C)   AaBB
D)   AAbb
E)   AabbF) A) and E)
G) B) and E)

Question 17

It is estimated that there are fewer than 100 genetic diseases caused by single gene mutations in humans.

Accepted Answer

A) True 
 B)False

Question 18

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.F) C) and D)
G) A) and D)

Question 19

If a mother is color-blind and her husband is not,which of the following children are not possible?

Accepted Answer

A)   normal daughter
B)   normal son
C)   color-blind sonD) A) and B)
E) A) and C)

Question 20

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

Accepted Answer

A)   Aa x aa
B)   AA x AA
C)   aa x aa
D)   Aa x AAE) A) and C)
F) A) and B)

Exam 20: Patterns of Genetic Inheritance

The probability of tossing a coin and having it be heads or tails is

Correct AnswerverifiedShow Answer

Which of the following represents a gamete with a dominant allele?

Correct AnswerverifiedShow Answer

Which of the following genotypes is heterozygous?

Correct AnswerverifiedShow 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 the inheritance of skin color example in the book,which genotype would have the same phenotype as AaBb?

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

If the mother's genotype is aa,all of her eggs will be identical for this trait.

Correct AnswerverifiedShow Answer

When you describe a person as having attached ear lobes,you are describing their 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 is familial hypercholesterolemia inherited?

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

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

Correct AnswerverifiedYESExplanation: Yes, if they ...View AnswerShow Answer

If a mother is color-blind and her husband is not,which of the following children are not possible?

Correct AnswerverifiedShow Answer

It is estimated that there are fewer than 100 genetic diseases caused by single gene mutations in humans.

Correct AnswerverifiedShow Answer

The square that is used to make all the possible combinations of gametes is called a Punnett square.

Correct AnswerverifiedShow Answer

In an X-linked dominant trait,affected males pass the trait only to daughters.

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

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

Correct AnswerverifiedShow Answer

Most polygenic traits show discrete phenotypes when plotted on a graph.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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YES
Explanation: Yes, if they ...
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