Question 1

Explain why human height appears to be a mixture of parental phenotypes when in fact height is genetically based.

Accepted Answer

Human height is a result of polygenic in

Question 2

Suppose that a parent has a genotype of RrYy. What is the probability of this parent producing a gamete with the RY genotype?

Accepted Answer

A) 3 in 4 
B) 1 in 2 
C) 1 in 4 
D) 1 in 8 
A) 3 in 4 
B) 1 in 2 
C) 1 in 4 
D) 1 in 8

Question 3

Mendel crossed true-breeding plants that had yellow peas with plants that had green peas. The resulting plants all had yellow peas. An F1 cross resulted in three-quarters of the plants having yellow peas and one-quarter of the plants having green peas. What does this tell you about the alleles for colour?

Accepted Answer

A) Green was the dominant colour. 
B) Yellow was the recessive colour. 
C) Yellow was the dominant colour. 
D) Yellow was usually the dominant colour, but sometimes green could be dominant. 
A) Green was the dominant colour. 
B) Yellow was the recessive colour. 
C) Yellow was the dominant colour. 
D) Yellow was usually the dominant colour, but sometimes green could be dominant.

Question 4

Match the examples listed below to the following five types of allele interactions.
-Human height is an example of this.

Accepted Answer

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

Question 5

Match each term with its correct definition.
-epistasis

Accepted Answer

A) displayed traits are unchanged over multiple generations 
B) first generation of offspring from a parental cross 
C) true-breeding organisms used in the initial cross 
D) result of a cross between two first-generation organisms 
E) allele that is expressed no matter what other allele is present
F)allele that is expressed only if two identical copies are present
G)any organism with two identical copies of an allele
H)any organism with two different forms of an allele
I)F1 heterozygote (for a single trait)
J)genetic makeup of an organism
K)physical traits of an organism
L)likelihood of something occurring if the occurrence is a matter of chance
M)organism that is heterozygous for two different traits
N)where an allele is found on a chromosome
O)when one allele cannot completely mask the effects of another allele
P)alleles at one locus mask the expression of alleles at a different locus
Q)several different genes contribute to a particular phenotype
R)single allele has multiple phenotypic effects 
A) displayed traits are unchanged over multiple generations 
B) first generation of offspring from a parental cross 
C) true-breeding organisms used in the initial cross 
D) result of a cross between two first-generation organisms 
E) allele that is expressed no matter what other allele is present
F)allele that is expressed only if two identical copies are present
G)any organism with two identical copies of an allele
H)any organism with two different forms of an allele
I)F1 heterozygote (for a single trait)
J)genetic makeup of an organism
K)physical traits of an organism
L)likelihood of something occurring if the occurrence is a matter of chance
M)organism that is heterozygous for two different traits
N)where an allele is found on a chromosome
O)when one allele cannot completely mask the effects of another allele
P)alleles at one locus mask the expression of alleles at a different locus
Q)several different genes contribute to a particular phenotype
R)single allele has multiple phenotypic effects

Question 6

Match the examples listed below to the following five types of allele interactions.
-Human blood type AB is an example of this allele interaction.

Accepted Answer

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

Question 7

Suppose that your father is heterozygous for a recessive disorder. Also suppose that you know your mom has two "good" alleles. What is the probability that you will have the disorder?

Accepted Answer

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

Question 8

Which of the following traits is subject to polygenic inheritance?

Accepted Answer

A) flower colour in snapdragons 
B) height in humans 
C) eye colour in humans 
D) pea texture in pea plants 
A) flower colour in snapdragons 
B) height in humans 
C) eye colour in humans 
D) pea texture in pea plants

Question 9

Suppose that pigmentation of a Labrador retriever's fur is subject to epistasis of the B alleles by the e alleles. B (black) is dominant over b (chocolate brown). E is dominant over

Accepted Answer

A) 9/16 black, 6/16 brown, 1/16 yellow 
B) 9/16 yellow, 3/16 brown, 4/16 black 
C) 9/16 yellow, 6/16 brown, 1/16 black 
D) 9/16 black, 3/16 brown, 4/16 yellow 
E)  Homozygous e is epistatic to the black and chocolate-brown genes. Given this information, what will result from a F1 dihybrid cross between two dogs? 
A) 9/16 black, 6/16 brown, 1/16 yellow 
B) 9/16 yellow, 3/16 brown, 4/16 black 
C) 9/16 yellow, 6/16 brown, 1/16 black 
D) 9/16 black, 3/16 brown, 4/16 yellow 
E)  Homozygous e is epistatic to the black and chocolate-brown genes. Given this information, what will result from a F1 dihybrid cross between two dogs?

Question 10

Suppose that mother has albinism, which is a recessive trait. Suppose also that your father has cystic fibrosis, which is also caused by a recessive trait. And you learn that your father-in-law has albinism and cystic fibrosis. What is the probability that your first child will NOT have either albinism or cystic fibrosis?

Accepted Answer

A) 1 in 16 
B) 1 in 8 
C) 3 in 8 
D) 2 in 5 
A) 1 in 16 
B) 1 in 8 
C) 3 in 8 
D) 2 in 5

Question 11

Suppose you have type O blood (genotype ii). To whom can you safely donate blood?

Accepted Answer

A) to people with type O only 
B) to people with type A only 
C) to people with types A, B, and O 
D) to people with type B only 
A) to people with type O only 
B) to people with type A only 
C) to people with types A, B, and O 
D) to people with type B only

Question 12

Match the examples listed below to the following five types of allele interactions.
-Peas being wrinkled or round is an example of this.

Accepted Answer

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

Question 13

Which of the following is a dihybrid cross?

Accepted Answer

A) RrMM ⋅ Rrmm 
B) RRMM ⋅ rrmm 
C) rrMM ⋅ RRmm 
D) RrMm ⋅ RrMm 
A) RrMM ⋅ Rrmm 
B) RRMM ⋅ rrmm 
C) rrMM ⋅ RRmm 
D) RrMm ⋅ RrMm

Question 14

A dihybrid testcross should always result in at least 50% of the progeny being recessive for both traits.

Accepted Answer

A) True 
 B)False

Question 15

Suppose that your mother and father both have cystic fibrosis, which is caused by a recessive allele. What are the odds of you having only one allele for the disorder?

Accepted Answer

A) 1 
B) 1 in 2 
C) 1 in 4 
D) 0 
A) 1 
B) 1 in 2 
C) 1 in 4 
D) 0

Question 16

Match the examples listed below to the following five types of allele interactions.
-Snapdragons have two alleles and three colours due to this.

Accepted Answer

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

Question 17

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

Accepted Answer

A) You were adopted and your parents did not tell you. 
B) You inherited one parent's blood type but not the other parent's blood type. 
C) Your father's genotype is IBIB and your mother's genotype is ii. 
D) Your father's genotype is IBi and your mother's genotype is ii. 
A) You were adopted and your parents did not tell you. 
B) You inherited one parent's blood type but not the other parent's blood type. 
C) Your father's genotype is IBIB and your mother's genotype is ii. 
D) Your father's genotype is IBi and your mother's genotype is ii.

Question 18

Why does sickle cell disease cause death?

Accepted Answer

A) The malformed blood cells assume a sickle shape. 
B) The malformed red blood cells cannot transport oxygen. 
C) The malformed red blood cells cannot enter capillaries and, in fact, block them. 
D) The patient has two copies of the mutant gene. 
A) The malformed blood cells assume a sickle shape. 
B) The malformed red blood cells cannot transport oxygen. 
C) The malformed red blood cells cannot enter capillaries and, in fact, block them. 
D) The patient has two copies of the mutant gene.

Question 19

An F1 organism is always homozygous.

Accepted Answer

A) True 
 B)False

Question 20

Gregor Mendel was trained in many academic disciplines. Which two were the most important to the development of his genetic theories?

Accepted Answer

A) religion and mathematics 
B) mathematics and botany 
C) religion and botany 
D) mathematics and zoology 
A) religion and mathematics 
B) mathematics and botany 
C) religion and botany 
D) mathematics and zoology

Exam 10: Mendel, Genes, and Inheritance

Explain why human height appears to be a mixture of parental phenotypes when in fact height is genetically based.

Suppose that a parent has a genotype of RrYy. What is the probability of this parent producing a gamete with the RY genotype?

Match the examples listed below to the following five types of allele interactions. -Human height is an example of this.

Match each term with its correct definition. -epistasis

Match the examples listed below to the following five types of allele interactions. -Human blood type AB is an example of this allele interaction.

Suppose that your father is heterozygous for a recessive disorder. Also suppose that you know your mom has two "good" alleles. What is the probability that you will have the disorder?

Which of the following traits is subject to polygenic inheritance?

Suppose that pigmentation of a Labrador retriever's fur is subject to epistasis of the B alleles by the e alleles. B (black) is dominant over b (chocolate brown). E is dominant over

Suppose you have type O blood (genotype ii). To whom can you safely donate blood?

Match the examples listed below to the following five types of allele interactions. -Peas being wrinkled or round is an example of this.

Which of the following is a dihybrid cross?

A dihybrid testcross should always result in at least 50% of the progeny being recessive for both traits.

Suppose that your mother and father both have cystic fibrosis, which is caused by a recessive allele. What are the odds of you having only one allele for the disorder?

Match the examples listed below to the following five types of allele interactions. -Snapdragons have two alleles and three colours due to this.

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

Why does sickle cell disease cause death?

An F1 organism is always homozygous.

Gregor Mendel was trained in many academic disciplines. Which two were the most important to the development of his genetic theories?

Light and Life

The Cell: an Overview

Defining Life and Its Origins

Energy and Enzymes

Cell Membranes and Signalling

Cellular Respiration

Photosynthesis

Cell Cycles

Genetic Recombination

Genes, Chromosomes, and Human Genetics

Dna Structure, Replication, and Organization

Gene Structure and Expression

Control of Gene Expression

Dna Technologies

Genomes and Proteomes

Evolution: the Development of the Theory

Microevolution: Changes Within Populations

Species and Macroevolution

Understanding the History of Life on Earth

Humans and Evolution

Bacteria and Archaea

Viruses, Viroids, and Prions: Infectious Biological Particles

Protists

Fungi

Plants

Diversity of Animals 1: Sponges, Radiata, Platyhelminthes, and Protostomes

Diversity of Animals 2: Deuterostomes: Vertebrates and Their Closest Relatives

Population Ecology

Population Interactions and Community Ecology

Ecosystems

Conservation of Biodiversity

Putting Selection to Work

Organization of the Plant Body

Transport in Plants

Reproduction and Development in Flowering Plants

Plant Nutrition

Plant Signals and Responses to the Environment

Introduction to Animal Organization and Physiology

Transport in Animals: the Circulatory System

Reproduction in Animals

Animal Development

Control of Animal Processes: Neural Control

Control of Animal Processes: Neural Control

Control of Animal Processes: Neural Integration

Muscles, Skeletons, and Body Movements

Animal Behaviour

Animal Nutrition

Gas Exchange: the Respiratory System

Regulating the Internal Environment

Defences Against Disease

Conservation and Evolutionary Physiology

Filters

An F₁ organism is always homozygous.