Question 1

Over __________ genes are involved in skin color determination.

Accepted Answer

A) 100 
B) 40 
C) 10 
D) 1 
E) 1000 
A) 100 
B) 40 
C) 10 
D) 1 
E) 1000 A

Question 2

A gene that produces multiple effects is called

Accepted Answer

A) a multiple allele. 
B) an autosome. 
C) an epistatic gene. 
D) a pleiotropic gene. 
E) an incompletely dominant gene. 
A) a multiple allele. 
B) an autosome. 
C) an epistatic gene. 
D) a pleiotropic gene. 
E) an incompletely dominant gene. D

Question 3

In radishes, red and white are the pure-breeding colors, and long and round are the pure-breeding shapes, while the hybrids are purple and oval.The cross of a red oval with a purple oval will produce all BUT which of the following phenotypes?

Accepted Answer

A) white and long 
B) purple and oval 
C) red and oval 
D) purple and long 
E) red and long 
A) white and long 
B) purple and oval 
C) red and oval 
D) purple and long 
E) red and long A

Question 4

In genetic analyses, researchers know that linkage of genes will introduce exceptions to the principle of

Accepted Answer

A) dominance. 
B) segregation. 
C) recessiveness. 
D) independent assortment. 
E) chromosomal inheritance. 
A) dominance. 
B) segregation. 
C) recessiveness. 
D) independent assortment. 
E) chromosomal inheritance.

Question 5

Which organism did Mendel utilize to work out the laws of segregation and independent assortment?

Accepted Answer

A) the fruit fly 
B) the rose 
C) the garden pea 
D) the chicken 
E) E.coli 
A) the fruit fly 
B) the rose 
C) the garden pea 
D) the chicken 
E) E.coli

Question 6

The letter B in the above figure represents which of the following?

Accepted Answer

A) carpels 
B) stamen 
C) eggs 
D) fertilized pea seeds 
E) none of these are correct 
A) carpels 
B) stamen 
C) eggs 
D) fertilized pea seeds 
E) none of these are correct

Question 7

Gene A occurs on chromosome 5, gene B is on chromosome 21.Therefore, these two portions of the chromosomes CANNOT be

Accepted Answer

A) genes. 
B) dominant. 
C) loci. 
D) alleles. 
E) recessive. 
A) genes. 
B) dominant. 
C) loci. 
D) alleles. 
E) recessive.

Question 8

In a Punnett square, the letters within the little boxes represent

Accepted Answer

A) offspring genotypes. 
B) parental genotypes. 
C) gametes. 
D) offspring phenotypes. 
E) parental phenotypes. 
A) offspring genotypes. 
B) parental genotypes. 
C) gametes. 
D) offspring phenotypes. 
E) parental phenotypes.

Question 9

Some dogs have erect ears; others have drooping ears.Some dogs bark when following a scent; others are silent.Erect ears and barking are due to dominant alleles located on different chromosomes.A dog homozygous for both dominant traits is mated to a droopy-eared, silent follower.The expected phenotypic ratio in the F1 generation is

Accepted Answer

A) 9:3:3:1. 
B) 100 percent of one phenotype. 
C) 1:1. 
D) 1:2:1. 
E) none of these. 
A) 9:3:3:1. 
B) 100 percent of one phenotype. 
C) 1:1. 
D) 1:2:1. 
E) none of these.

Question 10

If a pure-breeding long-tail cat (LL) is crossed with a pure-breeding cat with no tail (rumpy, ll), and a cat with a short tail (stumpy) is produced, the simplest explanation is

Accepted Answer

A) a mutation. 
B) an X-linked gene. 
C) an incompletely dominant gene. 
D) a lethal gene. 
E) chromosomal aberration. 
A) a mutation. 
B) an X-linked gene. 
C) an incompletely dominant gene. 
D) a lethal gene. 
E) chromosomal aberration.

Question 11

The role of environmental factors on gene expression is illustrated by

Accepted Answer

A) the varying plant height of genetically identical yarrow plants when grown at different elevations. 
B) varying body forms of Daphnia affected by the presence of predators 
C) the depression response that some persons make to very stressful situations. 
D) the fur pattern of Himalayan rabbits. 
E) all of these. 
A) the varying plant height of genetically identical yarrow plants when grown at different elevations. 
B) varying body forms of Daphnia affected by the presence of predators 
C) the depression response that some persons make to very stressful situations. 
D) the fur pattern of Himalayan rabbits. 
E) all of these.

Question 12

The number of different alleles for ABO blood types in the total human population is

Accepted Answer

A) 4. 
B) 6. 
C) 9. 
D) undetermined. 
E) 3. 
A) 4. 
B) 6. 
C) 9. 
D) undetermined. 
E) 3.

Question 13

The color of Siamese cats is controlled by

Accepted Answer

A) multiple alleles. 
B) quantitative inheritance. 
C) incompletely dominant genes. 
D) nondisjunction. 
E) variation in temperature, with cold temperature producing dark fur. 
A) multiple alleles. 
B) quantitative inheritance. 
C) incompletely dominant genes. 
D) nondisjunction. 
E) variation in temperature, with cold temperature producing dark fur.

Question 14

Solid color allele is dominant to striped, and long hair allele is dominant to short hair in a laboratory animal.If the mating of a long, solid animal with a short, striped animal produces the maximum number of phenotypes, how many will be produced?

Accepted Answer

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

Question 15

If two genes are almost always found in the same gamete,

Accepted Answer

A) they are located close together on the same chromosome. 
B) they are located on nonhomologous chromosomes. 
C) they are located far apart on the same chromosome. 
D) they are found on the sex chromosome. 
E) all of these are true except "they are located far apart on the same chromosome." 
A) they are located close together on the same chromosome. 
B) they are located on nonhomologous chromosomes. 
C) they are located far apart on the same chromosome. 
D) they are found on the sex chromosome. 
E) all of these are true except "they are located far apart on the same chromosome."

Question 16

Various forms of a single gene at a given locus is called

Accepted Answer

A) kinetochores. 
B) alleles. 
C) autosomes. 
D) loci. 
E) chromatids. 
A) kinetochores. 
B) alleles. 
C) autosomes. 
D) loci. 
E) chromatids.

Question 17

The F2 phenotypic ratio of a monohybrid cross involving a gene with incompletely dominant alleles is

Accepted Answer

A) 1:1. 
B) 2:1. 
C) 9:3:3:1. 
D) 1:2:1. 
E) 3:1. 
A) 1:1. 
B) 2:1. 
C) 9:3:3:1. 
D) 1:2:1. 
E) 3:1.

Question 18

From his monohybrid experiments, Mendel determined that __________is the dominant form.

Accepted Answer

A) wrinkled seed 
B) yellow pod 
C) dwarf plant height 
D) yellow seed 
E) white flower 
A) wrinkled seed 
B) yellow pod 
C) dwarf plant height 
D) yellow seed 
E) white flower

Question 19

Genetic recombination as a result of crossing over occurs more readily in genes

Accepted Answer

A) that are on the sex chromosomes. 
B) that are on the autosomes. 
C) that are located close together on the same chromosome. 
D) that are located far apart on the same chromosome. 
E) that are located on different chromosomes. 
A) that are on the sex chromosomes. 
B) that are on the autosomes. 
C) that are located close together on the same chromosome. 
D) that are located far apart on the same chromosome. 
E) that are located on different chromosomes.

Question 20

In cocker spaniels, black coat color (B) is dominant over red (b), and solid color (S) is dominant over spotted (s).If two dihybrids (Bb Ss) are crossed, what fraction of the black, solid offspring will be homozygous?

Accepted Answer

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

Exam 11: Observing Patterns in Inherited Traits

Over __________ genes are involved in skin color determination.

A gene that produces multiple effects is called

In radishes, red and white are the pure-breeding colors, and long and round are the pure-breeding shapes, while the hybrids are purple and oval.The cross of a red oval with a purple oval will produce all BUT which of the following phenotypes?

In genetic analyses, researchers know that linkage of genes will introduce exceptions to the principle of

Which organism did Mendel utilize to work out the laws of segregation and independent assortment?

The letter B in the above figure represents which of the following?

Gene A occurs on chromosome 5, gene B is on chromosome 21.Therefore, these two portions of the chromosomes CANNOT be

In a Punnett square, the letters within the little boxes represent

If a pure-breeding long-tail cat (LL) is crossed with a pure-breeding cat with no tail (rumpy, ll), and a cat with a short tail (stumpy) is produced, the simplest explanation is

The role of environmental factors on gene expression is illustrated by

The number of different alleles for ABO blood types in the total human population is

The color of Siamese cats is controlled by

Solid color allele is dominant to striped, and long hair allele is dominant to short hair in a laboratory animal.If the mating of a long, solid animal with a short, striped animal produces the maximum number of phenotypes, how many will be produced?

If two genes are almost always found in the same gamete,

Various forms of a single gene at a given locus is called

The F2 phenotypic ratio of a monohybrid cross involving a gene with incompletely dominant alleles is

From his monohybrid experiments, Mendel determined that __________is the dominant form.

Genetic recombination as a result of crossing over occurs more readily in genes

In cocker spaniels, black coat color (B) is dominant over red (b), and solid color (S) is dominant over spotted (s).If two dihybrids (Bb Ss) are crossed, what fraction of the black, solid offspring will be homozygous?

Invitation to Biology

Lifes Chemical Basis

Molecules of Life

Cell Structure and Function

A Closer Look at Cell Membranes

Ground Rules of Metabolism

Where It Startsphotosynthesis

Energy-Releasing Pathways

How Cells Reproduce

Meiosis and Sexual Reproduction

Chromosomes and Human Inheritance

Dna Structure and Function

From Dna to Protein

Controls Over Genes

Recombinant Dna and Genetic Engineering

The Macroevolutionary Puzzle

Emergence of Evolutionary Thought

Organizing Information About Species

The Origin and Evolution of Life

Viruses and Prokaryotes

Protists the Simplest Eukaryotes

Plants

Fungi

Animals: the Invertebrates

Animal Evolution the Chordates

Human Evolution: a Case Study

Plant Tissues

Plant Nutrition and Transport

Plant Reproduction

Plant Growth and Development

Animal Tissues and Organ Systems

Neural Control

Sensory Perception

Endocrine Control

Protection, Support, and Movement

Circulation

Immunity

Respiration

Digestion and Human Nutrition

Maintaining the Internal Environment

Animal Reproductive Systems

Animal Development

Animal Behavior

Population Ecology

Community Structure and Biodiversity

Ecosystems

The Biosphere

Human Impacts on the Biosphere

Filters

The F₂ phenotypic ratio of a monohybrid cross involving a gene with incompletely dominant alleles is