Question 1

Which of the following is incorrectly matched?

Accepted Answer

A)   physical expression of a trait - phenotype
B)   allele that masks expression of alternate allele - dominant
C)   identical alleles - homologous
D)   allele whose expression can be masked by an alternate allele - recessive
E)   the specific alleles that an individual has - genotype

Question 2

In a one-trait testcross, the phenotype that disappears in the F1 generation of a homozygous dominant and homozygous recessive cross is the

Accepted Answer

A)   dominant trait.
B)   negative trait.
C)   recessive trait.
D)   heterozygote.
E)   homozygote.

Question 3

In a monohybrid cross, how many traits are examined?

Accepted Answer

A)   1
B)   2
C)   3
D)   4
E)   5 A

Question 4

Morgan buys a male python from a snake dealer who tells him that the snake carries the albino allele. What is the most effective way for Morgan to verify this statement?

Accepted Answer

A)   Breed the snake with a heterozygous female.
B)   Breed the snake with a homozygous normal female.
C)   Breed the snake with a female sibling.
D)   Breed the snake with a homozygous recessive albino female.
E)   He can breed the snake with any female, and a portion of the offspring will always be albino.

Question 5

Alleles are

Accepted Answer

A)   dominant traits.
B)   recessive traits.
C)   two versions of the same trait.
D)   alternate versions of the same trait.
E)   exact copies of the same trait.

Question 6

Vitamin-D resistant rickets is a sex-linked dominant trait, which leads to softening of the bones, which can cause fractures and deformities. Rickets is often due to a deficiency of vitamin D; however, with vitamin- D resistant rickets, ingestion of vitamin D is ineffective. Maria's mother is normal and does not display any symptoms of this disease. Maria's father, however, has the disease. Maria marries a man that does not have the disease. What is the probability that they will have a son that has the disease?

Accepted Answer

A)   0%
B)   25%
C)   50%
D)   75%
E)   100%

Question 7

Both parents are heterozygous for Tay-Sachs disease an autosomal recessive disorder) . Three children in a row were born with Tay-Sachs disease. What is the chance that a fourth child will have Tay-Sachs disease?

Accepted Answer

A)   25%
B)   0%
C)   50%
D)   75%
E)   100%

Question 8

Hydrangeas are a flowering plant with large showy blooms. When a plant is grown in aluminum-rich soil, it has blue flowers; if the same plant is transplanted into soil that is lacking aluminum, the flowers produced will be pink. This is an example of

Accepted Answer

A)   environmental effects.
B)   codominance.
C)   incomplete dominance.
D)   polygenetic inheritance.
E)   monohybrid inheritance. A

Question 9

In a dihybrid cross where both parents are heterozygous, the phenotypic ratio is

Accepted Answer

A)   1:2:1.
B)   9:3:3:1.
C)   1:1:1.
D)   3:1.
E)   1:1:1:1.

Question 10

During meiosis, each pair of alleles on the homologous chromosomes sorts independently from all other pairs of alleles. This statement corresponds to

Accepted Answer

A)   the rule of multiplication.
B)   the law of segregation.
C)   the law of probability.
D)   gene theory.
E)   the law of independent assortment.

Question 11

A male is always homozygous for a trait that is

Accepted Answer

A)   codominant.
B)   X-linked.
C)   autosomal.
D)   dominant.
E)   dihybrid.

Question 12

Linked genes

Accepted Answer

A)   always assort independently.
B)   undergo crossing-over of sister chromatids at a high rate.
C)   are found on homologous chromosomes.
D)   never cross over during prophase I.
E)   tend to be close together on a single chromosome.

Question 13

Which of the following is not true with regard to the law of segregation?

Accepted Answer

A)   Each individual has two factors for each trait.
B)   Genes segregate during gamete formation.
C)   Gametes contain only one gene from each pair.
D)   During fertilization, each new individual obtains two genes for each trait.
E)   Each gamete contains two genes for each trait. E

Question 14

Which is not true according to Mendel's law and meiosis?

Accepted Answer

A)   One factor must be dominant and one factor recessive in each individual.
B)   Each individual contains two factors for each trait.
C)   Factors separate from each other during gamete formation.
D)   Each gamete contains one copy of each factor.
E)   Fertilization restores the presence of two factors.

Question 15

What genetic disorder is associated with the lack of an enzyme necessary for the normal metabolism of the amino acid phenylalanine?

Accepted Answer

A)   phenylketonuria PKU) 
B)   Marfan syndrome
C)   Huntington disease
D)   sickle-cell disease
E)   cystic fibrosis CF)

Question 16

A man with blood type A and a woman with blood type B can have a baby with blood type O.

Accepted Answer

A)   True, because A and B are the dominant blood types and both individuals could carry a type O allele.
B)   False, the child must have type AB blood.
C)   True, because A and B are codominant.
D)   False, because type A and B are dominant blood types and these individuals cannot have offspring with the recessive blood type.
E)   True, because only one O allele is needed.

Question 17

What type of disorder is muscular dystrophy classified as?

Accepted Answer

A)   sex-linked recessive
B)   sex-linked dominant
C)   codominance
D)   pleiotropic
E)   polygenic inheritance

Question 18

A blue-eyed, left-handed woman marries a brown-eyed, right-handed man who is heterozygous for both of his traits. If blue eyes and left-handedness are recessive, how many different phenotypes are possible in their children?

Accepted Answer

A)   four
B)   three
C)   two
D)   one
E)   five

Question 19

If a true-breeding tall pea plant is crossed with a tall pea plant of unknown parentage, which of the following is correct?

Accepted Answer

A)   All of the offspring F1)  will be short.
B)   Over several generations, no short individuals will appear.
C)   Some short individuals may appear in the F2 generation.
D)   It is impossible to determine based on the information provided.
E)   Some of the F1 generation will be short.

Question 20

What are all possible gametes that can be produced by an individual with the following genotype: FFGg?

Accepted Answer

A)   Fg, FG
B)   FF
C)   Fg
D)   FG, Fg, fG, fg
E)   Fg, fG

Exam 10: Patterns of Inheritance

Which of the following is incorrectly matched?

Correct Answer
verified

In a one-trait testcross, the phenotype that disappears in the F₁ generation of a homozygous dominant and homozygous recessive cross is the

Correct Answer
verified

In a monohybrid cross, how many traits are examined?

Correct Answer
verified
A

Morgan buys a male python from a snake dealer who tells him that the snake carries the albino allele. What is the most effective way for Morgan to verify this statement?

Correct Answer
verified

Alleles are

Correct Answer
verified

Correct Answer
verified

Both parents are heterozygous for Tay-Sachs disease an autosomal recessive disorder) . Three children in a row were born with Tay-Sachs disease. What is the chance that a fourth child will have Tay-Sachs disease?

Correct Answer
verified

Hydrangeas are a flowering plant with large showy blooms. When a plant is grown in aluminum-rich soil, it has blue flowers; if the same plant is transplanted into soil that is lacking aluminum, the flowers produced will be pink. This is an example of

Correct Answer
verified
A

In a dihybrid cross where both parents are heterozygous, the phenotypic ratio is

Correct Answer
verified

During meiosis, each pair of alleles on the homologous chromosomes sorts independently from all other pairs of alleles. This statement corresponds to

Correct Answer
verified

A male is always homozygous for a trait that is

Correct Answer
verified

Linked genes

Correct Answer
verified

Which of the following is not true with regard to the law of segregation?

Correct Answer
verified
E

Which is not true according to Mendel's law and meiosis?

Correct Answer
verified

What genetic disorder is associated with the lack of an enzyme necessary for the normal metabolism of the amino acid phenylalanine?

Correct Answer
verified

A man with blood type A and a woman with blood type B can have a baby with blood type O.

Correct Answer
verified

What type of disorder is muscular dystrophy classified as?

Correct Answer
verified

A blue-eyed, left-handed woman marries a brown-eyed, right-handed man who is heterozygous for both of his traits. If blue eyes and left-handedness are recessive, how many different phenotypes are possible in their children?

Correct Answer
verified

If a true-breeding tall pea plant is crossed with a tall pea plant of unknown parentage, which of the following is correct?

Correct Answer
verified

What are all possible gametes that can be produced by an individual with the following genotype: FFGg?

Correct Answer
verified

Exam 10: Patterns of Inheritance

Which of the following is incorrectly matched?

Correct AnswerverifiedShow Answer

In a one-trait testcross, the phenotype that disappears in the F1 generation of a homozygous dominant and homozygous recessive cross is the

Correct AnswerverifiedShow Answer

In a monohybrid cross, how many traits are examined?

Correct AnswerverifiedA

Morgan buys a male python from a snake dealer who tells him that the snake carries the albino allele. What is the most effective way for Morgan to verify this statement?

Correct AnswerverifiedShow Answer

Alleles are

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Both parents are heterozygous for Tay-Sachs disease an autosomal recessive disorder) . Three children in a row were born with Tay-Sachs disease. What is the chance that a fourth child will have Tay-Sachs disease?

Correct AnswerverifiedShow Answer

Hydrangeas are a flowering plant with large showy blooms. When a plant is grown in aluminum-rich soil, it has blue flowers; if the same plant is transplanted into soil that is lacking aluminum, the flowers produced will be pink. This is an example of

Correct AnswerverifiedA

In a dihybrid cross where both parents are heterozygous, the phenotypic ratio is

Correct AnswerverifiedShow Answer

During meiosis, each pair of alleles on the homologous chromosomes sorts independently from all other pairs of alleles. This statement corresponds to

Correct AnswerverifiedShow Answer

A male is always homozygous for a trait that is

Correct AnswerverifiedShow Answer

Linked genes

Correct AnswerverifiedShow Answer

Which of the following is not true with regard to the law of segregation?

Correct AnswerverifiedE

Which is not true according to Mendel's law and meiosis?

Correct AnswerverifiedShow Answer

What genetic disorder is associated with the lack of an enzyme necessary for the normal metabolism of the amino acid phenylalanine?

Correct AnswerverifiedShow Answer

A man with blood type A and a woman with blood type B can have a baby with blood type O.

Correct AnswerverifiedShow Answer

What type of disorder is muscular dystrophy classified as?

Correct AnswerverifiedShow Answer

A blue-eyed, left-handed woman marries a brown-eyed, right-handed man who is heterozygous for both of his traits. If blue eyes and left-handedness are recessive, how many different phenotypes are possible in their children?

Correct AnswerverifiedShow Answer

If a true-breeding tall pea plant is crossed with a tall pea plant of unknown parentage, which of the following is correct?

Correct AnswerverifiedShow Answer

What are all possible gametes that can be produced by an individual with the following genotype: FFGg?

Correct AnswerverifiedShow Answer

Correct Answer
verified

In a one-trait testcross, the phenotype that disappears in the F₁ generation of a homozygous dominant and homozygous recessive cross is the

Correct Answer
verified

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A

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A

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E

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