Question 1

In the cross depicted below, two parent plants, one with red flowers and the other with white flowers produce pink offspring. The white and red alleles for flower color in this plant exhibit

Accepted Answer

A)  homozygosity.
B)  codominance.
C)  pleiotrophy.
D)  incomplete dominance.E) A) and C)
F) All of the above

Question 2

____________________ dominance is expressed in a genetic cross in which the heterozygous phenotype is intermediate between the two homozygous phenotypes.

Accepted Answer

The answer of ____________________ dominance is expressed in a genetic...

Question 3

Which of the following statements is true?

Accepted Answer

A)  Specific mutations occur because they are needed.
B)  Mutations only occur during development.
C)  All mutations are harmful.
D)  Gametes fuse without regard to which mutations they carry.E) C) and D)
F) A) and B) D

Question 4

Humans have many genes that contribute to the unique array of proteins found on their red blood cells. Your MN blood type (the letters indicate the presence of M and N proteins on the red blood cells) is determined by the codominant alleles Lᴹ and Lᴺ. Which of the following genotypes could be produced when a man with MN blood and a woman with MN blood mate?

Accepted Answer

A)  LMLM
B)  LMLN
C)  LNLN
D)  all of the aboveE) C) and D)
F) B) and C)

Question 5

Which of the following symbols correctly represents a person who has a homozygous genotype?

Accepted Answer

A)  Ww
B)  WW
C)  XY
D)  WxE) A) and B)
F) None of the above

Question 6

Is it possible for two organisms with the same genotype to have different phenotypes?

Accepted Answer

A)  No; identical genotypes lead to identical phenotypes.
B)  No; the DNA of the recessive alleles not expressed in the phenotype is degraded within each cell.
C)  Yes; the expression of the genotype can be affected by the environment.
D)  Yes; the phenotype expressed determines what the genotype will be.E) B) and D)
F) A) and D)

Question 7

The best way to get accurate results from a probability exercise is to

Accepted Answer

A)  choose an example with incomplete dominance.
B)  know the answer in advance.
C)  choose an example that will come out 50-50.
D)  make a large number of observations.E) B) and D)
F) None of the above

Question 8

The plant shown in the image below would be considered a hybrid.

Accepted Answer

A) True 
 B)False

Question 9

If both copies of a given gene in an organism are identical, the organism is homozygous for that trait.

Accepted Answer

A) True 
 B)False

Question 10

A thoroughbred racehorse could have at most _____ alleles of the same gene.

Accepted Answer

A)  16
B)  8
C)  4
D)  2E) B) and C)
F) A) and D)

Question 11

The individuals Mendel observed in the F₁ generations were always

Accepted Answer

A)  homozygous recessive.
B)  homozygous dominant.
C)  heterozygous.
D)  codominant.E) C) and D)
F) A) and B) C

Question 12

The individuals in the image below exhibit a variety of physical, biochemical, and behavioral characteristics that are based on their DNA sequences.

Accepted Answer

A) True 
 B)False

Question 13

If a person has one copy of each of two different alleles for a given gene, the person is _____ for that trait.

Accepted Answer

A)  heterozygous
B)  homozygous
C)  recessive
D)  true-breedingE) B) and C)
F) A) and C)

Question 14

An allele is

Accepted Answer

A)  a version of a gene.
B)  a trait that can be affected by the external environment.
C)  always codominant to its counterpart in another chromosome.
D)  the result of a change in phenotype.E) B) and D)
F) B) and C) A

Question 15

According to Mendel's law of ____________________, when gametes are formed, the separation of alleles for one gene is unrelated to the separation of alleles for other genes.

Accepted Answer

independen...

Question 16

The genetic makeup of an organism, such as Gg, is its ____________________.

Accepted Answer

The answer of The genetic makeup of an organism, such...

Question 17

The figure below shows three generations in one of Mendel's experiments. According to the data in this figure, Mendel's F₂ generation contains many more purple flowers than white flowers. Which of the following is the best explanation of this observation?

Accepted Answer

A)  Three-quarters of the offspring must receive the white allele.
B)  The chance of an individual offspring receiving a white allele is only 25 percent.
C)  The probability of any individual offspring receiving a copy of the purple allele is 3:1.
D)  The white allele is only dominant in about 25 percent of the offspring that inherit it.E) None of the above
F) A) and B)

Question 18

When two individuals who are heterozygous for a gene are mated, we would predict a _____ ratio of dominant to recessive phenotype in the offspring.

Accepted Answer

A)  1:2:1
B)  1:3
C)  3:1
D)  9:3:3:1E) B) and C)
F) None of the above

Question 19

Feather color in a certain species of bird is controlled by a pair of alleles that exhibit incomplete dominance. If birds that are homozygous for one allele are black and birds that are homozygous for the other allele are white, then heterozygous birds would be

Accepted Answer

A)  black.
B)  white.
C)  gray.
D)  black with white stripes.E) A) and C)
F) B) and C)

Question 20

The chance of a parent's passing on a given allele to a child _____ each time he or she has another child.

Accepted Answer

A)  is reduced
B)  is increased
C)  is the same
D)  changesE) A) and D)
F) A) and C)

Exam 12: Patterns of Inheritance

In the cross depicted below, two parent plants, one with red flowers and the other with white flowers produce pink offspring. The white and red alleles for flower color in this plant exhibit

Correct Answer
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____________________ dominance is expressed in a genetic cross in which the heterozygous phenotype is intermediate between the two homozygous phenotypes.

Correct Answer
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Which of the following statements is true?

Correct Answer
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D

Correct Answer
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Which of the following symbols correctly represents a person who has a homozygous genotype?

Correct Answer
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Is it possible for two organisms with the same genotype to have different phenotypes?

Correct Answer
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The best way to get accurate results from a probability exercise is to

Correct Answer
verified

The plant shown in the image below would be considered a hybrid.

Correct Answer
verified

If both copies of a given gene in an organism are identical, the organism is homozygous for that trait.

Correct Answer
verified

A thoroughbred racehorse could have at most _____ alleles of the same gene.

Correct Answer
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The individuals Mendel observed in the F₁ generations were always

Correct Answer
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C

The individuals in the image below exhibit a variety of physical, biochemical, and behavioral characteristics that are based on their DNA sequences.

Correct Answer
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If a person has one copy of each of two different alleles for a given gene, the person is _____ for that trait.

Correct Answer
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An allele is

Correct Answer
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A

According to Mendel's law of ____________________, when gametes are formed, the separation of alleles for one gene is unrelated to the separation of alleles for other genes.

Correct Answer
verified
independen...
View Answer

The genetic makeup of an organism, such as Gg, is its ____________________.

Correct Answer
verified

The figure below shows three generations in one of Mendel's experiments. According to the data in this figure, Mendel's F₂ generation contains many more purple flowers than white flowers. Which of the following is the best explanation of this observation?

Correct Answer
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When two individuals who are heterozygous for a gene are mated, we would predict a _____ ratio of dominant to recessive phenotype in the offspring.

Correct Answer
verified

Feather color in a certain species of bird is controlled by a pair of alleles that exhibit incomplete dominance. If birds that are homozygous for one allele are black and birds that are homozygous for the other allele are white, then heterozygous birds would be

Correct Answer
verified

The chance of a parent's passing on a given allele to a child _____ each time he or she has another child.

Correct Answer
verified

Exam 12: Patterns of Inheritance

In the cross depicted below, two parent plants, one with red flowers and the other with white flowers produce pink offspring. The white and red alleles for flower color in this plant exhibit

Correct AnswerverifiedShow Answer

____________________ dominance is expressed in a genetic cross in which the heterozygous phenotype is intermediate between the two homozygous phenotypes.

Correct AnswerverifiedShow Answer

Which of the following statements is true?

Correct AnswerverifiedD

Correct AnswerverifiedShow Answer

Which of the following symbols correctly represents a person who has a homozygous genotype?

Correct AnswerverifiedShow Answer

Is it possible for two organisms with the same genotype to have different phenotypes?

Correct AnswerverifiedShow Answer

The best way to get accurate results from a probability exercise is to

Correct AnswerverifiedShow Answer

The plant shown in the image below would be considered a hybrid.

Correct AnswerverifiedShow Answer

If both copies of a given gene in an organism are identical, the organism is homozygous for that trait.

Correct AnswerverifiedShow Answer

A thoroughbred racehorse could have at most _____ alleles of the same gene.

Correct AnswerverifiedShow Answer

The individuals Mendel observed in the F₁ generations were always

Correct AnswerverifiedC

The individuals in the image below exhibit a variety of physical, biochemical, and behavioral characteristics that are based on their DNA sequences.

Correct AnswerverifiedShow Answer

If a person has one copy of each of two different alleles for a given gene, the person is _____ for that trait.

Correct AnswerverifiedShow Answer

An allele is

Correct AnswerverifiedA

According to Mendel's law of ____________________, when gametes are formed, the separation of alleles for one gene is unrelated to the separation of alleles for other genes.

Correct Answerverifiedindependen...View AnswerShow Answer

The genetic makeup of an organism, such as Gg, is its ____________________.

Correct AnswerverifiedShow Answer

The figure below shows three generations in one of Mendel's experiments. According to the data in this figure, Mendel's F₂ generation contains many more purple flowers than white flowers. Which of the following is the best explanation of this observation?

Correct AnswerverifiedShow Answer

When two individuals who are heterozygous for a gene are mated, we would predict a _____ ratio of dominant to recessive phenotype in the offspring.

Correct AnswerverifiedShow Answer

Feather color in a certain species of bird is controlled by a pair of alleles that exhibit incomplete dominance. If birds that are homozygous for one allele are black and birds that are homozygous for the other allele are white, then heterozygous birds would be

Correct AnswerverifiedShow Answer

The chance of a parent's passing on a given allele to a child _____ each time he or she has another child.

Correct AnswerverifiedShow Answer

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D

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C

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A

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independen...
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