Question 1

What would be true if linkage of two genes was complete?

Accepted Answer

A) Crossing over between the two genes would never occur. 
B) The genes would assort independently. 
C) All possible combinations of alleles in the gametes would be produced. 
D) All possible combinations of alleles in the offspring would be produced. 
A) Crossing over between the two genes would never occur. 
B) The genes would assort independently. 
C) All possible combinations of alleles in the gametes would be produced. 
D) All possible combinations of alleles in the offspring would be produced.

Question 2

In people, a dimpled chin is an autosomal dominant trait. Many famous celebrities, such as John Travolta and Michael and Kirk Douglas, have this condition. Assume that the wrestler and actor Hulk Hogan is homozygous for the dimpled chin, and he married a woman with a round chin. They had two children, Brooke and Nick. What proportion of their female progeny (such as Brooke Hogan)will show the trait?

Accepted Answer

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

Question 3

A man who carries a harmful sex-linked (on the X chromosome)gene will pass the gene on to:

Accepted Answer

A) all of his daughters. 
B) half of his daughters. 
C) half of his sons. 
D) all of his sons. 
E) all of his sons and daughters. 
A) all of his daughters. 
B) half of his daughters. 
C) half of his sons. 
D) all of his sons. 
E) all of his sons and daughters.

Question 4

What occurs to result in linked genes not being inherited together?

Accepted Answer

Chromosomes recombin

Question 5

If, in a heterozygous individual, only one allele is expressed in the phenotype, that allele is:

Accepted Answer

A) normal. 
B) haploid. 
C) potent. 
D) recessive. 
E) dominant. 
A) normal. 
B) haploid. 
C) potent. 
D) recessive. 
E) dominant.

Question 6

The results of a test cross reveal that all the offspring resemble the parent being tested. This parent must be:

Accepted Answer

A) heterozygous. 
B) recessive. 
C) self-pollinated. 
D) homozygous. 
E) haploid. 
A) heterozygous. 
B) recessive. 
C) self-pollinated. 
D) homozygous. 
E) haploid.

Question 7

All of the following are true regarding pedigree analysis EXCEPT that it:

Accepted Answer

A) documents the transmission of a genetic characteristic over two or more generations. 
B) reveals whether a trait is dominant or recessive. 
C) involves molecular biology. 
D) is exclusively used to study the patterns of inheritance in dogs. 
A) documents the transmission of a genetic characteristic over two or more generations. 
B) reveals whether a trait is dominant or recessive. 
C) involves molecular biology. 
D) is exclusively used to study the patterns of inheritance in dogs.

Question 8

What is the ratio of phenotypes in the offspring produced by the cross Aa × Aa? Assume complete dominance for the trait.

Accepted Answer

A) 100% dominance 
B) 100% recessive 
C) 75% dominant:25% recessive 
D) 50% dominant:50% recessive 
E) 25% dominant:75% recessive 
A) 100% dominance 
B) 100% recessive 
C) 75% dominant:25% recessive 
D) 50% dominant:50% recessive 
E) 25% dominant:75% recessive

Question 9

In crossing a homozygous recessive with a heterozygote, what is the chance of getting a homozygous recessive phenotype in the F1 generation?

Accepted Answer

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

Question 10

In garden peas, the allele for tall plants is dominant over the allele for short plants. Imagine that a true-breeding tall plant is crossed with a short plant. Then one of their offspring is test crossed. Out of 20 offspring resulting from the test cross, about how many should be tall?

Accepted Answer

A) 0 
B) 5 
C) 10 
D) 15 
E) 20 
A) 0 
B) 5 
C) 10 
D) 15 
E) 20

Question 11

A Mendelian test cross is used to determine whether:

Accepted Answer

A) an allele is dominant or recessive. 
B) flowers are purple or white. 
C) the genotype or phenotype is more important. 
D) an individual is homozygous or heterozygous. 
E) segregation or independent assortment is occurring. 
A) an allele is dominant or recessive. 
B) flowers are purple or white. 
C) the genotype or phenotype is more important. 
D) an individual is homozygous or heterozygous. 
E) segregation or independent assortment is occurring.

Question 12

The region of the chromosome occupied by a gene is called a(n)________.

Accepted Answer

The answer of The region of the chromosome occupied by...

Question 13

Human females who receive sex-linked genes always express them. True or False?

Accepted Answer

A) True 
 B)False

Exam 10: Patterns of Inheritance

What would be true if linkage of two genes was complete?

A man who carries a harmful sex-linked (on the X chromosome)gene will pass the gene on to:

What occurs to result in linked genes not being inherited together?

If, in a heterozygous individual, only one allele is expressed in the phenotype, that allele is:

The results of a test cross reveal that all the offspring resemble the parent being tested. This parent must be:

All of the following are true regarding pedigree analysis EXCEPT that it:

What is the ratio of phenotypes in the offspring produced by the cross Aa × Aa? Assume complete dominance for the trait.

In crossing a homozygous recessive with a heterozygote, what is the chance of getting a homozygous recessive phenotype in the F1 generation?

In garden peas, the allele for tall plants is dominant over the allele for short plants. Imagine that a true-breeding tall plant is crossed with a short plant. Then one of their offspring is test crossed. Out of 20 offspring resulting from the test cross, about how many should be tall?

A Mendelian test cross is used to determine whether:

The region of the chromosome occupied by a gene is called a(n)________.

Human females who receive sex-linked genes always express them. True or False?

An Introduction to Life on Earth

Atoms, Molecules, and Life

Biological Molecules

Cell Structure and Function

Cell Membrane Structure and Function

Energy Flow in the Life of a Cell

Capturing Solar Energy: Photosynthesis

Harvesting Energy: Glycolysis and Cellular Respiration

The Continuity of Life: Cellular Reproduction

Dna: the Molecule of Heredity

Gene Expression and Regulation

Biotechnology

Principles of Evolution

How Populations Evolve

The Origin of Species

The History of Life

Systematics: Seeking Order Amidst Diversity

The Diversity of Prokaryotes and Viruses

The Diversity of Protists

The Diversity of Plants

The Diversity of Fungi

Animal Diversity I: Invertebrates

Animal Diversity Ii: Vertebrates

Animal Behavior

Population Growth and Regulation

Community Interactions

How Do Ecosystems Work

Earths Diverse Ecosystems

Conserving Earths Biodiversity

Homeostasis and the Organization of the Animal Body

Circulation

Respiration

Nutrition and Digestion

The Urinary System

Defenses Against Disease

Chemical Control of the Animal Body: the Endocrine System

The Nervous System

The Senses

Action and Support: the Muscles and Skeleton

Animal Reproduction

Animal Development

Plant Anatomy and Nutrient Transport

Plant Reproduction and Development

Plant Responses to the Environment

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