Question 1

The height of pea plants from a cross between parent plants heterozygous for height, in which tall is dominant, would be

Accepted Answer

A)  all short. 
B)  all tall. 
C)  1 tall: 3 short. 
D)  2 short: 2 tall. 
E)  3 tall: 1 short. 
A)  all short. 
B)  all tall. 
C)  1 tall: 3 short. 
D)  2 short: 2 tall. 
E)  3 tall: 1 short.

Question 2

The theory of blending inheritance was shown to be false by Mendel's observations of dominant and recessive alleles.

Accepted Answer

A) True 
 B)False

Question 3

Mendel's principle of segregation states that

Accepted Answer

A)  alleles from one parent mask the expression of alleles from the other parent. 
B)  alleles separate from each other before forming gametes. 
C)  hybrids will express a phenotype intermediate between the two parental phenotypes. 
D)  true-breeding parents produce offspring of the same phenotype. 
E)  dominant and recessive alleles segregate during meiosis. 
A)  alleles from one parent mask the expression of alleles from the other parent. 
B)  alleles separate from each other before forming gametes. 
C)  hybrids will express a phenotype intermediate between the two parental phenotypes. 
D)  true-breeding parents produce offspring of the same phenotype. 
E)  dominant and recessive alleles segregate during meiosis.

Question 4

Genotype can always be inferred from phenotype.

Accepted Answer

A) True 
 B)False

Question 5

___________ were originally designated the location of a particular gene on the chromosome.

Accepted Answer

A)  Loci 
B)  Genotypes 
C)  Phenotypes 
D)  Alleles 
E)  Homozygous 
A)  Loci 
B)  Genotypes 
C)  Phenotypes 
D)  Alleles 
E)  Homozygous

Question 6

____ are alternative forms of a gene that govern the same feature, such as eye color, and occupy corresponding positions on homologous chromosomes.

Accepted Answer

A)  Alleles 
B)  Loci 
C)  Homozygotes 
D)  Coupled traits 
E)  Heterozygotes 
A)  Alleles 
B)  Loci 
C)  Homozygotes 
D)  Coupled traits 
E)  Heterozygotes

Question 7

A test cross is performed to determine phenotype.

Accepted Answer

A) True 
 B)False

Question 8

Which of the following represents the possible genotype(s) resulting from a cross between a heterozygous individual (Bb) and one that is homozygous (bb)?

Accepted Answer

A)  BB and Bb 
B)  Bb and bb 
C)  BB only 
D)  Bb only 
E)  bb only 
A)  BB and Bb 
B)  Bb and bb 
C)  BB only 
D)  Bb only 
E)  bb only

Question 9

You want to determine if black coat color (B) and long tail length (T) are linked in a new breed of dog (white coat and short tails are recessive). Design a two-point test cross to determine if this is indeed the case. What results would you expect if the genes were linked? What would you expect if the alleles sorted independently?

Accepted Answer

Concepts to Consider: A two-point test c

Question 10

A lizard with a striped tail and a normal head is crossed with one having a normal tail and a spotted head. All the F1 progeny are normal (no stripes or spots). What progeny are expected from a cross of the F1 progeny? Assume that the genes conferring stripes and spots were on different chromosomes.

Accepted Answer

A)  Equal numbers of normal, striped, spotted and striped, and spotted 
B)  3 striped : 1 spotted 
C)  9 striped and spotted : 3 spotted : 3 striped : 1 normal 
D)  9 striped : 3 spotted : 1 striped or spotted 
E)  9 normal : 3 striped : 3 spotted : 1 striped and spotted 
A)  Equal numbers of normal, striped, spotted and striped, and spotted 
B)  3 striped : 1 spotted 
C)  9 striped and spotted : 3 spotted : 3 striped : 1 normal 
D)  9 striped : 3 spotted : 1 striped or spotted 
E)  9 normal : 3 striped : 3 spotted : 1 striped and spotted

Question 11

Match between columns
                        Premises: Alternative gene variants

Accepted Answer

The Answer of Heredity and Genetic variation and Phenotype and is...

Question 12

A ____ is best used to demonstrate the linkage of two genes.

Accepted Answer

A)  monohybrid cross 
B)  dihybrid cross 
C)  monohybrid test cross 
D)  two-allele test cross 
E)  two-point test cross 
A)  monohybrid cross 
B)  dihybrid cross 
C)  monohybrid test cross 
D)  two-allele test cross 
E)  two-point test cross

Question 13

Mating a pure-bred pink rose plant with a pure-bred pink rose plant will produce

Accepted Answer

A)  plants with pink, red, and white roses. 
B)  plants with only pink roses. 
C)  plants with red or white roses in a 3:1 ratio. 
D)  plants with white or red roses in a 3:1 ratio. 
E)  plants with only red roses. 
A)  plants with pink, red, and white roses. 
B)  plants with only pink roses. 
C)  plants with red or white roses in a 3:1 ratio. 
D)  plants with white or red roses in a 3:1 ratio. 
E)  plants with only red roses.

Question 14

Breeding a yellow dog with a brown dog produced puppies with both yellow and brown hairs intermixed. This is an example of

Accepted Answer

A)  variegation. 
B)  codominance. 
C)  incomplete dominance. 
D)  epistasis. 
E)  a polygenic trait. 
A)  variegation. 
B)  codominance. 
C)  incomplete dominance. 
D)  epistasis. 
E)  a polygenic trait.

Question 15

Match between columns
                        Premises: The presence of certain alleles at one locus can prevent or mask the expression of alleles at a different locus.

Accepted Answer

The Answer of Pleiotropy and Polygenic inheritance and Codominance and is...

Question 16

Match between columns
                        Premises: The inheritance of traits from one generation to the next

Accepted Answer

The Answer of Genetics and Locus and Genetic variation and is...

Question 17

Match between columns
                        Premises: One defective enzyme may affect the function of many cells.

Accepted Answer

The Answer of Polygenic inheritance and Incomplete dominance and Pleiotropy is...

Question 18

The sex of most mammals, birds, and insects is determined by

Accepted Answer

A)  the temperature. 
B)  the external environment. 
C)  sex chromosomes. 
D)  parental age. 
E)  the internal environment. 
A)  the temperature. 
B)  the external environment. 
C)  sex chromosomes. 
D)  parental age. 
E)  the internal environment.

Question 19

In genetics, map units express the distance between

Accepted Answer

A)  chromosomes during metaphase. 
B)  two loci on a chromosome. 
C)  alleles. 
D)  polar bodies. 
E)  homologous chromosomes. 
A)  chromosomes during metaphase. 
B)  two loci on a chromosome. 
C)  alleles. 
D)  polar bodies. 
E)  homologous chromosomes.

Question 20

Two Martians fall in love and marry. One Martian is homozygous for red eyes and the other is heterozygous. The recessive eye color is purple. What is the probability that they will have a child with purple eyes (assuming Martians have similar genetics to humans)?

Accepted Answer

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

Exam 11: The Basic Principles of Heredity

The height of pea plants from a cross between parent plants heterozygous for height, in which tall is dominant, would be

The theory of blending inheritance was shown to be false by Mendel's observations of dominant and recessive alleles.

Mendel's principle of segregation states that

Genotype can always be inferred from phenotype.

___________ were originally designated the location of a particular gene on the chromosome.

____ are alternative forms of a gene that govern the same feature, such as eye color, and occupy corresponding positions on homologous chromosomes.

A test cross is performed to determine phenotype.

Which of the following represents the possible genotype(s) resulting from a cross between a heterozygous individual (Bb) and one that is homozygous (bb)?

A ____ is best used to demonstrate the linkage of two genes.

Mating a pure-bred pink rose plant with a pure-bred pink rose plant will produce

Breeding a yellow dog with a brown dog produced puppies with both yellow and brown hairs intermixed. This is an example of

The sex of most mammals, birds, and insects is determined by

In genetics, map units express the distance between

Two Martians fall in love and marry. One Martian is homozygous for red eyes and the other is heterozygous. The recessive eye color is purple. What is the probability that they will have a child with purple eyes (assuming Martians have similar genetics to humans)?

A View of Life

Atoms and Molecules: the Chemical Basis of Life

The Chemistry of Life: Organic Compounds

Organization of the Cell

Biological Membranes

Cell Communication

Energy and Metabolism

How Cells Make Atp: Energy-Releasing Pathways

Photosynthesis: Capturing Light Energy

Chromosomes, Mitosis, and Meiosis

DNA: The Carrier of Genetic Information

Gene Expression

Gene Regulation

DNA Technology and Genomics

Human Genetics and the Human Genome

Developmental Genetics

Introduction to Darwinian Evolution

Evolutionary Change in Populations

Speciation and Macroevolution

The Origin and Evolutionary History of Life

The Evolution of Primates

Understanding Diversity: Systematics

Viruses and Subviral Agents

Bacteria and Archaea

Protists

Seedless Plants

Seed Plants

The Fungi

An Introduction to Animal Diversity

Sponges, Cnidarians, Ctenophores, and Protostomes

The Deuterostomes

Plant Structure, Growth, and Development

Leaf Structure and Function

Stem Structure and Transport

Roots and Mineral Nutrition

Reproduction in Flowering Plants

Plant Developmental Responses to External and Internal Signals

Animal Structure and Function: an Introduction

Protection, Support, and Movement

Neural Signaling

Neural Regulation

Sensory Systems

Internal Transport

The Immune System: Internal Defense

Gas Exchange

Processing Food and Nutrition

Osmoregulation and Disposal of Metabolic Wastes

Endocrine Regulation

Reproduction

Animal Development

Animal Behavior

Introduction to Ecology: Population Ecology

Community Ecology

Ecosystems and the Biosphere

Ecology and the Geography of Life

Biological Diversity and Conservation Biology

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