Question 1

If a monohybrid cross results in 1:2:1 genotypic and phenotypic ratios in the offspring, then which type of inheritance might be at work?

Accepted Answer

A)  dominance 
B)  incomplete dominance 
C)  epistasis 
D)  pleiotropy 
E)  polygenic inheritance 
A)  dominance 
B)  incomplete dominance 
C)  epistasis 
D)  pleiotropy 
E)  polygenic inheritance

Question 2

Define epistasis and give an example.

Accepted Answer

In epistasis, two or more genes affect t

Question 3

Your father is heterozygous for the recessive disorder phenylketonuria (PKU). You know your mother has two "good" alleles. You have a ____chance of having the disorder.

Accepted Answer

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

Question 4

If a woman has blood type O and a man has blood type AB, what is the probability that they will have a child with blood type O?

Accepted Answer

A)  0 
B)  1/16 
C)  1/4 
D)  1/2 
E)  3/4 
A)  0 
B)  1/16 
C)  1/4 
D)  1/2 
E)  3/4

Question 5

Match between columns
                        Premises: true breeding
incomplete dominance
probability
epistasis
recessive
pleiotropy
genotype
phenotype
homozygote
heterozygote
FS1U1B12S1U1B0generation
polygenic inheritance
FS1U1B11S1U1B0generation
locus
dominance
monohybrid
dihybrid
P generation

Accepted Answer

The Answer of The result of a cross between two is...

Question 6

How does sickle cell disease cause death?

Accepted Answer

A)  The malformed red blood cells cannot transport oxygen. 
B)  The malformed red blood cells can block capillaries. 
C)  The malformed red blood cells have a higher affinity for CO2than for oxygen. 
D)  The mutant hemoglobin polypeptide cannot bind O2due to a change in three amino acids. 
E)  More cells assume the sickle shape as oxygen concentration in the tissues increases. 
A)  The malformed red blood cells cannot transport oxygen. 
B)  The malformed red blood cells can block capillaries. 
C)  The malformed red blood cells have a higher affinity for CO2than for oxygen. 
D)  The mutant hemoglobin polypeptide cannot bind O2due to a change in three amino acids. 
E)  More cells assume the sickle shape as oxygen concentration in the tissues increases.

Question 7

Polygenic inheritance is often modified by ____.

Accepted Answer

A)  the environment 
B)  gene blending 
C)  epistasis 
D)  dihybrid crosses 
E)  pleiotropy 
A)  the environment 
B)  gene blending 
C)  epistasis 
D)  dihybrid crosses 
E)  pleiotropy

Question 8

What is the main premise of the blending theory of inheritance that predominated before 1900?

Accepted Answer

A)  We inherit traits from only one parent. 
B)  Traits are inherited via a mixing of parental blood. 
C)  Parental chromosomes undergo recombination to produce blended chromosomes in their offspring. 
D)  Traits may skip a generation due to the blending of paternal and maternal phenotypes. 
E)  Paternal and maternal chromosomes separate independently in meiosis, creating gametes with a blend of paternal and maternal chromosomes. 
A)  We inherit traits from only one parent. 
B)  Traits are inherited via a mixing of parental blood. 
C)  Parental chromosomes undergo recombination to produce blended chromosomes in their offspring. 
D)  Traits may skip a generation due to the blending of paternal and maternal phenotypes. 
E)  Paternal and maternal chromosomes separate independently in meiosis, creating gametes with a blend of paternal and maternal chromosomes.

Question 9

Match between columns
                        Premises: wrinkled vs. round peas
human AB blood type
Labrador retrievers fur color (black, chocolate brown, yellow)
snapdragon flower color (red, pink, and white)
human height

Accepted Answer

The Answer of polygenic inheritance and incomplete dominance and codominance is...

Question 10

Use the product rule to calculate the probability (P) of two independent events, X and Y, both occurring.

Accepted Answer

A)  P = P(X2) + P(Y2) 
B)  P = P(X2) x P(Y2) 
C)  P = P(X) x P(Y) 
D)  P = P(X) + P(Y) 
E)  P = (P(X) + P(Y))2 
A)  P = P(X2) + P(Y2) 
B)  P = P(X2) x P(Y2) 
C)  P = P(X) x P(Y) 
D)  P = P(X) + P(Y) 
E)  P = (P(X) + P(Y))2

Question 11

If your mother is heterozygous for Huntington's disease, which is caused by a dominant allele, the odds that you will inherit the disorder from her 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 12

Mendel crossed true-breeding plants having yellow peas with true-breeding plants having green peas. The resulting plants all had yellow peas. An F1cross resulted in 3/4 of the plants having yellow peas and 1/4 of the plants having green peas. What does this tell you about the alleles for color?

Accepted Answer

A)  Yellow is usually the dominant color, but sometimes green can be dominant. 
B)  Green is the dominant color. 
C)  Yellow is the dominant color. 
D)  Yellow is the recessive color. 
E)  Yellow and green are codominant. 
A)  Yellow is usually the dominant color, but sometimes green can be dominant. 
B)  Green is the dominant color. 
C)  Yellow is the dominant color. 
D)  Yellow is the recessive color. 
E)  Yellow and green are codominant.

Question 13

Human skin color is an example of ____, while sickle-cell anemia is an example of ____.

Accepted Answer

A)  multiple alleles; epistasis 
B)  incomplete dominance; multiple alleles 
C)  polygenic inheritance; pleiotropy 
D)  pleiotropy; polygenic inheritance 
E)  incomplete dominance; pleiotropy 
A)  multiple alleles; epistasis 
B)  incomplete dominance; multiple alleles 
C)  polygenic inheritance; pleiotropy 
D)  pleiotropy; polygenic inheritance 
E)  incomplete dominance; pleiotropy

Question 14

If a gene has multiple alleles, ____.

Accepted Answer

A)  only two alleles of the gene exist in the population 
B)  more than two alleles of the gene are present in any given individual 
C)  more than two alleles of the gene are present in the population 
D)  one or more of the alleles is epistatic to the other(s) 
E)  the alleles must be incompletely dominant 
A)  only two alleles of the gene exist in the population 
B)  more than two alleles of the gene are present in any given individual 
C)  more than two alleles of the gene are present in the population 
D)  one or more of the alleles is epistatic to the other(s) 
E)  the alleles must be incompletely dominant

Question 15

____ occurs within a single plant, while ____ occurs between two plants.

Accepted Answer

A)  A dihybrid cross; a monohybrid cross 
B)  Epistasis; polygenic inheritance 
C)  A testcross; cross-pollination 
D)  Self-pollination; cross-pollination 
E)  A dihybrid cross; self-pollination 
A)  A dihybrid cross; a monohybrid cross 
B)  Epistasis; polygenic inheritance 
C)  A testcross; cross-pollination 
D)  Self-pollination; cross-pollination 
E)  A dihybrid cross; self-pollination

Question 16

Identify the disorder caused by a dominant allele.

Accepted Answer

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

Question 17

If your mother and father are both heterozygous for Huntington's disease, which is caused by a dominant allele, the odds of you having 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 18

An individual heterozygous for sickle-cell disease produces both normal and abnormal polypeptides. This is an example of ____.

Accepted Answer

A)  epistasis 
B)  incomplete dominance 
C)  polygenic inheritance 
D)  multiple alleles 
E)  pleiotropy 
A)  epistasis 
B)  incomplete dominance 
C)  polygenic inheritance 
D)  multiple alleles 
E)  pleiotropy

Question 19

An F1individual resulting from a cross between a homozygous dominant parent and a homozygous recessive parent is always ____.

Accepted Answer

A)  heterozygous or homozygous dominant 
B)  heterozygous or homozygous recessive 
C)  homozygous dominant 
D)  homozygous recessive 
E)  heterozygous 
A)  heterozygous or homozygous dominant 
B)  heterozygous or homozygous recessive 
C)  homozygous dominant 
D)  homozygous recessive 
E)  heterozygous

Exam 12: Mendel, Genes, and Inheritance

If a monohybrid cross results in 1:2:1 genotypic and phenotypic ratios in the offspring, then which type of inheritance might be at work?

Define epistasis and give an example.

Your father is heterozygous for the recessive disorder phenylketonuria (PKU). You know your mother has two "good" alleles. You have a ____chance of having the disorder.

If a woman has blood type O and a man has blood type AB, what is the probability that they will have a child with blood type O?

How does sickle cell disease cause death?

Polygenic inheritance is often modified by ____.

What is the main premise of the blending theory of inheritance that predominated before 1900?

Use the product rule to calculate the probability (P) of two independent events, X and Y, both occurring.

If your mother is heterozygous for Huntington's disease, which is caused by a dominant allele, the odds that you will inherit the disorder from her are ____.

Mendel crossed true-breeding plants having yellow peas with true-breeding plants having green peas. The resulting plants all had yellow peas. An F1cross resulted in 3/4 of the plants having yellow peas and 1/4 of the plants having green peas. What does this tell you about the alleles for color?

Human skin color is an example of ____, while sickle-cell anemia is an example of ____.

If a gene has multiple alleles, ____.

____ occurs within a single plant, while ____ occurs between two plants.

Identify the disorder caused by a dominant allele.

If your mother and father are both heterozygous for Huntington's disease, which is caused by a dominant allele, the odds of you having the disorder are ____.

An individual heterozygous for sickle-cell disease produces both normal and abnormal polypeptides. This is an example of ____.

An F1individual resulting from a cross between a homozygous dominant parent and a homozygous recessive parent is always ____.

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

Mendel crossed true-breeding plants having yellow peas with true-breeding plants having green peas. The resulting plants all had yellow peas. An F₁cross resulted in 3/4 of the plants having yellow peas and 1/4 of the plants having green peas. What does this tell you about the alleles for color?

Human skin color is an example of , while sickle-cell anemia is an example of .

occurs within a single plant, while occurs between two plants.

An F₁individual resulting from a cross between a homozygous dominant parent and a homozygous recessive parent is always ____.