Question 1

Your father has type B blood, and your mother has type O blood. You learn that you also have blood type O. What does this tell you?

Accepted Answer

A)  Your father is homozygous for type B blood. 
B)  Your mother is heterozygous for type O blood. 
C)  Your father's genotype is IBi and your mother's genotype is ii . 
D)  Your father's genotype is IBIBand your mother's genotype is ii . 
E)  Your father's genotype is IAIBand your mother's genotype is ii . 
A)  Your father is homozygous for type B blood. 
B)  Your mother is heterozygous for type O blood. 
C)  Your father's genotype is IBi and your mother's genotype is ii . 
D)  Your father's genotype is IBIBand your mother's genotype is ii . 
E)  Your father's genotype is IAIBand your mother's genotype is ii .

Question 2

What is the key difference between incomplete dominance and codominance?

Accepted Answer

A)  In incomplete dominance, the recessive allele cannot be detected; in codominance, the expression of the recessive allele is apparent. 
B)  In incomplete dominance, it is possible to detect the expression of a recessive allele; in codominance, both alleles contribute equally to the phenotype. 
C)  In codominance, it is possible to detect the expression of a recessive allele; in incomplete dominance, both alleles contribute equally to the phenotype. 
D)  In incomplete dominance, it is possible to detect the expression of the dominant allele; in codominance, two different genes contribute to multiple phenotypes. 
E)  The two terms are synonymous. 
A)  In incomplete dominance, the recessive allele cannot be detected; in codominance, the expression of the recessive allele is apparent. 
B)  In incomplete dominance, it is possible to detect the expression of a recessive allele; in codominance, both alleles contribute equally to the phenotype. 
C)  In codominance, it is possible to detect the expression of a recessive allele; in incomplete dominance, both alleles contribute equally to the phenotype. 
D)  In incomplete dominance, it is possible to detect the expression of the dominant allele; in codominance, two different genes contribute to multiple phenotypes. 
E)  The two terms are synonymous.

Question 3

How is Mendel's Principle of Independent Assortment related to meiosis?

Accepted Answer

From his experiments, Mendel concluded t

Question 4

Your mother has albinism, which is a recessive trait. You learn that your spouse's mother also has albinism. Neither you nor your spouse have albinism. What are the odds that your first child will have albinism?

Accepted Answer

A)  0 
B)  1/4 
C)  1/2 
D)  3/4 
E)  1 
A)  0 
B)  1/4 
C)  1/2 
D)  3/4 
E)  1

Question 5

Explain the genetic basis of height in humans.

Accepted Answer

Human height is a result of polygenic in

Question 6

The different alleles in human blood type are a demonstration of ____.

Accepted Answer

A)  incomplete dominance only 
B)  codominance only 
C)  dominance and codominance 
D)  dominance and incomplete dominance 
E)  dominance, codominance, and incomplete dominance 
A)  incomplete dominance only 
B)  codominance only 
C)  dominance and codominance 
D)  dominance and incomplete dominance 
E)  dominance, codominance, and incomplete dominance

Question 7

A man and woman are each heterozygous for the autosomal recessive gene for albinism. They already have two non-albino children and want to have two more. What is the probability that their next two children will be phenotypically identical to each other with regard to skin color (i.e., either both albino or neither albino)?

Accepted Answer

A)  1/16 
B)  3/16 
C)  4/16 
D)  9/16 
E)  10/16 
A)  1/16 
B)  3/16 
C)  4/16 
D)  9/16 
E)  10/16

Question 8

In the case of complete dominance, if a plant has a ____ genotype for a particular trait, its phenotype will be the ____ trait.

Accepted Answer

A)  heterozygous; recessive 
B)  homozygous dominant; recessive 
C)  homozygous recessive; dominant 
D)  heterozygous; dominant 
A)  heterozygous; recessive 
B)  homozygous dominant; recessive 
C)  homozygous recessive; dominant 
D)  heterozygous; dominant

Question 9

From his experiments, Mendel concluded that each individual carries two factors, or ____, that govern the inheritance of each trait. Different versions of each factor are known as ____.

Accepted Answer

A)  alleles; gene markers 
B)  genes; loci 
C)  alleles; genes 
D)  genes; alleles 
E)  gene markers; genes 
A)  alleles; gene markers 
B)  genes; loci 
C)  alleles; genes 
D)  genes; alleles 
E)  gene markers; genes

Question 10

Mouse pigmentation is subject to epistasis of the B alleles by the d alleles. B (black) is dominant over b (brown), and D is dominant over d . Homozygous d is epistatic to the black and brown genes. Given this information, what will result from a F1cross between two mice?

Accepted Answer

A)  9/16 black, 3/16 brown, 4/16 white 
B)  9/16 white, 3/16 brown, 4/16 black 
C)  9/16 black, 6/16 brown, 1/16 white 
D)  9/16 white, 6/16 brown, 1/16 black 
E)  all black mice 
A)  9/16 black, 3/16 brown, 4/16 white 
B)  9/16 white, 3/16 brown, 4/16 black 
C)  9/16 black, 6/16 brown, 1/16 white 
D)  9/16 white, 6/16 brown, 1/16 black 
E)  all black mice

Question 11

A patient presents with the following symptoms: anemia, heart failure, pneumonia, paralysis, and abdominal pain. After learning about their family history, you run a genetic test for which disorder?

Accepted Answer

A)  cystic fibrosis 
B)  albinism 
C)  sickle-cell anemia 
D)  achondroplasia 
E)  schizophrenia 
A)  cystic fibrosis 
B)  albinism 
C)  sickle-cell anemia 
D)  achondroplasia 
E)  schizophrenia

Question 12

You have type O blood (genotype ii ). Who can you donate blood to in an emergency?

Accepted Answer

A)  type O only 
B)  type B only 
C)  type A only 
D)  type AB only 
E)  types A, B, AB, and O 
A)  type O only 
B)  type B only 
C)  type A only 
D)  type AB only 
E)  types A, B, AB, and O

Question 13

If your mother and father both have cystic fibrosis, which is caused by a recessive allele, the odds of you inheriting only one allele for the disorder are ____.

Accepted Answer

A)  1/4 
B)  1/2 
C)  3/4 
D)  1 
E)  0 
A)  1/4 
B)  1/2 
C)  3/4 
D)  1 
E)  0

Question 14

In snapdragons, the red allele CRis incompletely dominant over the white allele CW. If you cross a pink snapdragon ( CRCW) with a white snapdragon ( CWCW), what percentage of the progeny will be red?

Accepted Answer

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

Question 15

In snapdragons, the red allele CRis incompletely dominant over the white allele CW. Which two plants would you cross to produce a true-breeding pink snapdragon?

Accepted Answer

A)  pink with pink 
B)  pink with red 
C)  red with white 
D)  pink with white 
E)  a true-breeding pink snapdragon cannot be created 
A)  pink with pink 
B)  pink with red 
C)  red with white 
D)  pink with white 
E)  a true-breeding pink snapdragon cannot be created

Question 16

According to the chromosome theory of inheritance, ____.

Accepted Answer

A)  genes on chromosomes always assort independently 
B)  paternal chromosomes determine the offspring's phenotype 
C)  maternal chromosomes determine the offspring's phenotype 
D)  genes and their alleles are carried on chromosomes 
E)  genes are carried on chromosomes and alleles are the product of gene expression 
A)  genes on chromosomes always assort independently 
B)  paternal chromosomes determine the offspring's phenotype 
C)  maternal chromosomes determine the offspring's phenotype 
D)  genes and their alleles are carried on chromosomes 
E)  genes are carried on chromosomes and alleles are the product of gene expression

Question 17

A ____ individual is always part of a testcross.

Accepted Answer

A)  heterozygous 
B)  homozygous recessive 
C)  homozygous dominant 
D)  self-fertilized 
E)  dihybrid 
A)  heterozygous 
B)  homozygous recessive 
C)  homozygous dominant 
D)  self-fertilized 
E)  dihybrid

Question 18

If your mother and father both have cystic fibrosis, which is caused by a recessive allele, the odds of you having cystic fibrosis are ____.

Accepted Answer

A)  1/4 
B)  1/2 
C)  3/4 
D)  1 
E)  0 
A)  1/4 
B)  1/2 
C)  3/4 
D)  1 
E)  0

Question 19

June has type B blood and has a baby, Joey, with type AB blood. Her husband, Jim, has type O blood. June believes that there has been a mix-up at the hospital. She suspects that another couple, Ann and Al, who had a baby the same day, were allowed to take her son home. That baby Arnie has type O blood. Al and Ann both have type A blood. Which of the following is a correct statement about who is Joey's father?

Accepted Answer

A)  Neither Jim nor Al could be Joey's father. 
B)  Jim could be Joey's father, but Al could not. 
C)  Either Jim or Al could be Joey's father. 
D)  Al could be Joey's father, but Jim could not. 
E)  Al is definitely Joey's father, but Jim could also. 
A)  Neither Jim nor Al could be Joey's father. 
B)  Jim could be Joey's father, but Al could not. 
C)  Either Jim or Al could be Joey's father. 
D)  Al could be Joey's father, but Jim could not. 
E)  Al is definitely Joey's father, but Jim could also.

Question 20

Which notation represents a monohybrid cross?

Accepted Answer

A)  RrMM x Rrmm 
B)  RRMM x rrmm 
C)  Rr x Rr 
D)  rr x RR 
E)  Rr x rr 
A)  RrMM x Rrmm 
B)  RRMM x rrmm 
C)  Rr x Rr 
D)  rr x RR 
E)  Rr x rr

Exam 12: Mendel, Genes, and Inheritance

Your father has type B blood, and your mother has type O blood. You learn that you also have blood type O. What does this tell you?

What is the key difference between incomplete dominance and codominance?

How is Mendel's Principle of Independent Assortment related to meiosis?

Your mother has albinism, which is a recessive trait. You learn that your spouse's mother also has albinism. Neither you nor your spouse have albinism. What are the odds that your first child will have albinism?

Explain the genetic basis of height in humans.

The different alleles in human blood type are a demonstration of ____.

In the case of complete dominance, if a plant has a ____ genotype for a particular trait, its phenotype will be the ____ trait.

From his experiments, Mendel concluded that each individual carries two factors, or ____, that govern the inheritance of each trait. Different versions of each factor are known as ____.

Mouse pigmentation is subject to epistasis of the B alleles by the d alleles. B (black) is dominant over b (brown), and D is dominant over d . Homozygous d is epistatic to the black and brown genes. Given this information, what will result from a F1cross between two mice?

A patient presents with the following symptoms: anemia, heart failure, pneumonia, paralysis, and abdominal pain. After learning about their family history, you run a genetic test for which disorder?

You have type O blood (genotype ii ). Who can you donate blood to in an emergency?

If your mother and father both have cystic fibrosis, which is caused by a recessive allele, the odds of you inheriting only one allele for the disorder are ____.

In snapdragons, the red allele CRis incompletely dominant over the white allele CW. If you cross a pink snapdragon ( CRCW) with a white snapdragon ( CWCW), what percentage of the progeny will be red?

In snapdragons, the red allele CRis incompletely dominant over the white allele CW. Which two plants would you cross to produce a true-breeding pink snapdragon?

According to the chromosome theory of inheritance, ____.

A ____ individual is always part of a testcross.

If your mother and father both have cystic fibrosis, which is caused by a recessive allele, the odds of you having cystic fibrosis are ____.

Which notation represents a monohybrid cross?

Introduction to Biological Concepts and Research

Life, Chemistry, and Water

Biological Molecules: the Carbon Compounds of Life

Cells

Membranes and Transport

Energy, Enzymes, and Biological Reactions

Cellular Respiration: Harvesting Chemical Energy

Photosynthesis

Cell Communication

Cell Division and Mitosis

Meiosis: the Cellular Basis of Sexual Reproduction

Genes, Chromosomes, and Human Genetics

Dna Structure, Replication, and Organization

Gene Expression: From Dna to Protein

Regulation of Gene Expression

Bacterial and Viral Genetics

Dna Technology: Making and Using Genetically Altered Organisms, and Other Applications

Genomes and Proteomes

The Development of Evolutionary Thought

Microevolution: Genetic Changes Within Populations

Speciation

Paleobiology and Macroevolution

Systematic Biology: Phylogeny and Classification

The Origin of Life

Prokaryotes and Viruses

Protists

Seedless Plants

Seed Plants

Fungi

Animal Phylogeny, Acoelomates, and Protostomes

Deuterostomes: Vertebrates and Their Closest Relatives

The Plant Body

Transport in Plants

Plant Nutrition

Reproduction and Development in Flowering Plants

Plant Signals and Responses to the Environment

Introduction to Animal Organization and Physiology

Information Flow and the Neuron

Nervous Systems

Sensory Systems

The Endocrine System

Muscles, Bones, and Body Movements

The Circulatory System

Defenses Against Disease

Gas Exchange: the Respiratory System

Digestive Systems and Animal Nutrition

Regulating the Internal Environment: Osmoregulation, Excretion, and Thermoregulation

Animal Reproduction

Animal Development

Ecology and the Biosphere

Population Ecology

Population Interactions and Community Ecology

Ecosystems

Biodiversity and Conservation Biology

Animal Behavior

Filters

In the case of complete dominance, if a plant has a genotype for a particular trait, its phenotype will be the trait.

From his experiments, Mendel concluded that each individual carries two factors, or , that govern the inheritance of each trait. Different versions of each factor are known as .

Mouse pigmentation is subject to epistasis of the B alleles by the d alleles. B (black) is dominant over b (brown), and D is dominant over d . Homozygous d is epistatic to the black and brown genes. Given this information, what will result from a F₁cross between two mice?

In snapdragons, the red allele C^Ris incompletely dominant over the white allele C^W. If you cross a pink snapdragon ( C^RC^W) with a white snapdragon ( C^WC^W), what percentage of the progeny will be red?

In snapdragons, the red allele C^Ris incompletely dominant over the white allele C^W. Which two plants would you cross to produce a true-breeding pink snapdragon?