Question 1

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.F) B) and D)
G) All of the above

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

Tay-Sachs is an autosomal recessive diso...

Question 3

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 4

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 5

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 B)
G) A) and C)

Question 6

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

Question 7

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

Question 8

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

Accepted Answer

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

Question 9

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)   0.
E)   2.F) A) and E)
G) B) and E)

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

Question 11

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

Question 12

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

Accepted Answer

A) True 
 B)False

Question 13

A male inherits his X-linked allele from his mother.

Accepted Answer

A) True 
 B)False

Question 14

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 15

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

Question 16

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 E)
G) A) and B)

Question 17

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

Accepted Answer

A)   A
B)   b
C)   AA
D)   Aa
E)   bbF) A) and E)
G) None of the above

Question 18

Describe the term "polygenic traits."

Accepted Answer

Polygenic traits are governed by several...

Question 19

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

Accepted Answer

A)   left
B)   right
C)   left 50% of the time and right 50% of the time
D)   left 25% of the time and right 75% of the time
E)   left 75% of the time and right 25% of the timeF) C) and E)
G) A) and C)

Question 20

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

Exam 21: Patterns of Genetic Inheritance

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

Correct Answer
verified

Describe the term "polygenic traits."

Correct Answer
verified
Polygenic traits are governed by several...
View Answer

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

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified
Tay-Sachs is an autosomal recessive diso...
View Answer

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

Correct Answer
verified

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

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

Correct Answer
verified

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

Correct Answer
verified

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 Answer
verified

A male inherits his X-linked allele from his mother.

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

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

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

Correct Answer
verified

Exam 21: Patterns of Genetic Inheritance

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

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 is not a characteristic of an autosomal dominant disorder pedigree?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Correct AnswerverifiedTay-Sachs is an autosomal recessive diso...View AnswerShow Answer

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

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 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 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

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

A male inherits his X-linked allele from his mother.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

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

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

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified
Polygenic traits are governed by several...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Tay-Sachs is an autosomal recessive diso...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
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Correct Answer
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