Question 1

Environmental factors can alter the effects of genes.

Accepted Answer

A) True 
 B)False  True

Question 2

Which of the following statements is not true?

Accepted Answer

A)  Two organisms with the same genotype are homozygous. 
B)  Two organisms with the same phenotype may have different genotypes. 
C)  A heterozygous organism may have the same phenotype as a homozygous organism. 
D)  A heterozygous organism has the same number of copies of a given gene as a homozygous organism. 
A)  Two organisms with the same genotype are homozygous. 
B)  Two organisms with the same phenotype may have different genotypes. 
C)  A heterozygous organism may have the same phenotype as a homozygous organism. 
D)  A heterozygous organism has the same number of copies of a given gene as a homozygous organism. A

Question 3

A tall plant mates with itself and produces all tall offspring. This cross is repeated for many generations with the same results. The parental plant is

Accepted Answer

A)  heterozygous. 
B)  completely dominant. 
C)  mutated. 
D)  true-breeding. 
A)  heterozygous. 
B)  completely dominant. 
C)  mutated. 
D)  true-breeding. D

Question 4

The leaf color of a certain plant is controlled by one gene. For that gene, the allele G = orange and g = green. You have a plant with orange leaves, but do not know whether that plant's genotype is GG or Gg. Explain how a single cross would help you determine the genotype of your plant.

Accepted Answer

Cross the plant to a green-leaved (gg) p

Question 5

New alleles arise by _______ , which changes the DNA that makes up a gene.

Accepted Answer

The answer of New alleles arise by _______ , which...

Question 6

The figure below depicts red blood cells from a mother, a father and their child. The mother and father are the biological parents of this child.  
What is the mother's ABO genotype?

Accepted Answer

A)  IAIA 
B)  IAIB 
C)  IAi 
D)  Not enough information provided 
A)  IAIA 
B)  IAIB 
C)  IAi 
D)  Not enough information provided

Question 7

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)  changes 
A)  is reduced 
B)  is increased 
C)  is the same 
D)  changes

Question 8

The figure below shows three generations in one of Mendel's experiments.  
The data in this figure demonstrate that purple flower color is dominant in peas. Which of the following is the best rationale for this conclusion?

Accepted Answer

A)  In the F2 generation, more plants have purple flowers. In any cross, the allele that is most common in the offspring is dominant. 
B)  Members of the F1 generation are heterozygous. Whatever allele is visible in a known heterozygote is considered dominant. 
C)  The stronger, or in this case, darker, allele is always considered dominant. 
D)  An individual that produces more offspring gives more alleles to the next generation. As a result, that allele dominates the next generation. 
A)  In the F2 generation, more plants have purple flowers. In any cross, the allele that is most common in the offspring is dominant. 
B)  Members of the F1 generation are heterozygous. Whatever allele is visible in a known heterozygote is considered dominant. 
C)  The stronger, or in this case, darker, allele is always considered dominant. 
D)  An individual that produces more offspring gives more alleles to the next generation. As a result, that allele dominates the next generation.

Question 9

The observable physical characteristics of an organism is its _______.

Accepted Answer

The answer of The observable physical characteristics of an organism...

Question 10

Which of the following statements is true?

Accepted Answer

A)  Mendel's laws are less accurate than Punnett square results. 
B)  Mendel's laws are useful only in unusual situations. 
C)  Mendel's laws always correctly determine how genes are inherited. 
D)  Mendel's laws always correctly predict the phenotype of an organism. 
A)  Mendel's laws are less accurate than Punnett square results. 
B)  Mendel's laws are useful only in unusual situations. 
C)  Mendel's laws always correctly determine how genes are inherited. 
D)  Mendel's laws always correctly predict the phenotype of an organism.

Question 11

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

Accepted Answer

A)  No. Identical genotypes will 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. 
A)  No. Identical genotypes will 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.

Question 12

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 must be _____.

Accepted Answer

A)  black 
B)  white 
C)  gray 
D)  black with white stripes 
A)  black 
B)  white 
C)  gray 
D)  black with white stripes

Question 13

_______ 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 14

In a genetic cross of Gg with Gg guinea pigs, none of the four offspring were gg. This

Accepted Answer

A)  disproves Mendel's law of independent assortment. 
B)  neither supports nor disproves Mendel's law of independent assortment. 
C)  supports Mendel's law of independent assortment. 
D)  supports Mendel's law of segregation. 
A)  disproves Mendel's law of independent assortment. 
B)  neither supports nor disproves Mendel's law of independent assortment. 
C)  supports Mendel's law of independent assortment. 
D)  supports Mendel's law of segregation.

Question 15

A given gene can have only two alleles.

Accepted Answer

A) True 
 B)False

Question 16

Which of the following statements is a basic summary of Mendel's laws?

Accepted Answer

A)  All good human genetic traits are dominant, and harmful traits are recessive. 
B)  The pattern of inherited characteristics of organisms is not predictable. 
C)  Alleles separate into different gametes during meiosis, and the separation of alleles for one gene does not affect the separation of alleles for other genes. 
D)  Recessive alleles cause the death of the gamete. 
A)  All good human genetic traits are dominant, and harmful traits are recessive. 
B)  The pattern of inherited characteristics of organisms is not predictable. 
C)  Alleles separate into different gametes during meiosis, and the separation of alleles for one gene does not affect the separation of alleles for other genes. 
D)  Recessive alleles cause the death of the gamete.

Question 17

An allele is

Accepted Answer

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

Question 18

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. 
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.

Question 19

A genetic _______ is a controlled mating experiment used to examine the inheritance of a particular gene.

Accepted Answer

The answer of A genetic _______ is a controlled mating...

Question 20

When a _______ variety of a plant is self-fertilized, all of its offspring have the same phenotype as the parent.

Accepted Answer

The answer of When a _______ variety of a plant...

Exam 10: Patterns of Inheritance

Environmental factors can alter the effects of genes.

Which of the following statements is not true?

A tall plant mates with itself and produces all tall offspring. This cross is repeated for many generations with the same results. The parental plant is

The leaf color of a certain plant is controlled by one gene. For that gene, the allele G = orange and g = green. You have a plant with orange leaves, but do not know whether that plant's genotype is GG or Gg. Explain how a single cross would help you determine the genotype of your plant.

New alleles arise by _______ , which changes the DNA that makes up a gene.

The figure below depicts red blood cells from a mother, a father and their child. The mother and father are the biological parents of this child. What is the mother's ABO genotype?

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

The figure below shows three generations in one of Mendel's experiments. The data in this figure demonstrate that purple flower color is dominant in peas. Which of the following is the best rationale for this conclusion?

The observable physical characteristics of an organism is its _______.

Which of the following statements is true?

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

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 must be _____.

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

In a genetic cross of Gg with Gg guinea pigs, none of the four offspring were gg. This

A given gene can have only two alleles.

Which of the following statements is a basic summary of Mendel's laws?

An allele is

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

A genetic _______ is a controlled mating experiment used to examine the inheritance of a particular gene.

When a _______ variety of a plant is self-fertilized, all of its offspring have the same phenotype as the parent.

The Nature of Science and the Characteristics of Life

Organizing the Diversity of Life

Major Groups of Living Organisms

Chemical Building Blocks

Cell Structure and Internal Compartments

Cell Membranes, Transport, and Communication

Energy and Enzymes

Photosynthesis and Cellular Respiration

Cell Division

Chromosomes and Human Genetics

DNA

From Gene to Protein

Control of Gene Expression

DNA Technology

How Evolution Works

Evolution of Populations

Adaptation and Speciation

The Evolutionary History of Life

Maintaining the Internal Environment

Animal Nutrition and Digestion

Gas Exchange

The Circulatory System

Animal Hormones

The Nervous System

Sensing the Environment

Skeletons, Muscles, and Movement

Defenses against Disease

Reproduction and Development

Animal Behavior

Plant Structure, Nutrition, and Transport

Plant Growth and Reproduction

The Biosphere

Growth of Populations

Interactions among Organisms

Communities of Organisms

Ecosystems

Global Change

Biodiversity and People

Cancer: Cell Division Out of Control

Harnessing the Human Genome

Humans and Evolution

Smoking--Beyond Lung Cancer

Feeding a Hungry Planet

Building a Sustainable Society

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