Question 1

The debate over nature vs. nurture in determining certain human characteristics can be explained by pleiotropic genes .

Accepted Answer

A) True 
 B)False

Question 2

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 3

The range of phenotypic possibilities that can develop from a certain dog genotype under different environmental conditions is called the:

Accepted Answer

A)  epistatic interaction. 
B)  norm of reaction. 
C)  nurture limit. 
D)  genotype range. 
E)  maximum phenotype. 
A)  epistatic interaction. 
B)  norm of reaction. 
C)  nurture limit. 
D)  genotype range. 
E)  maximum phenotype.

Question 4

Color-blindness is more common in males than in females because:

Accepted Answer

A)  females need to inherit only one copy of the recessive color blindness allele to express the trait. 
B)  males only need to inherit the recessive maternal color blindness allele to be color blind. 
C)  color-blindness is an autosomal trait. 
D)  all females are hemizygous for the color blindness trait. 
E)  males can only inherit paternal color blindness alleles. 
A)  females need to inherit only one copy of the recessive color blindness allele to express the trait. 
B)  males only need to inherit the recessive maternal color blindness allele to be color blind. 
C)  color-blindness is an autosomal trait. 
D)  all females are hemizygous for the color blindness trait. 
E)  males can only inherit paternal color blindness alleles.

Question 5

If a couple is planning on having two children, what is the probability that both will be male?

Accepted Answer

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

Question 6

A heterozygous fruit fly with normal wings and a gray body (VvBb) is crossed with homozygous flies with vestigial wings and black bodies (vvbb). This type of cross is known as a:

Accepted Answer

A)  monohybrid cross. 
B)  dihybrid cross 
C)  polytropic cross. 
D)  true breeding cross. 
E)  chromosomal cross. 
A)  monohybrid cross. 
B)  dihybrid cross 
C)  polytropic cross. 
D)  true breeding cross. 
E)  chromosomal cross.

Question 7

In peas, Mendel found that tall plants and yellow peas are dominant. The phenotype for a pea plant with the genotype TTyy would be:

Accepted Answer

A)  intermediate height with greenish-yellow peas. 
B)  short with green peas. 
C)  short with yellow peas. 
D)  tall with green peas. 
E)  tall with yellow peas. 
A)  intermediate height with greenish-yellow peas. 
B)  short with green peas. 
C)  short with yellow peas. 
D)  tall with green peas. 
E)  tall with yellow peas.

Question 8

Linked genes are located on ____ chromosomes and do not follow the principle of ____.

Accepted Answer

A)  different; independent assortment. 
B)  different; segregation 
C)  the same; segregation 
D)  the same; independent assortment 
E)  sex chromosomes; segregation 
A)  different; independent assortment. 
B)  different; segregation 
C)  the same; segregation 
D)  the same; independent assortment 
E)  sex chromosomes; segregation

Question 9

In rabbits, coat color is governed by four alleles: C for dark gray, Cch for chinchilla, Ch for himalayan, and c for white. This is an example of:

Accepted Answer

A)  X-linked genes. 
B)  multiple alleles. 
C)  epistasis. 
D)  codominance. 
E)  incomplete dominance. 
A)  X-linked genes. 
B)  multiple alleles. 
C)  epistasis. 
D)  codominance. 
E)  incomplete dominance.

Question 10

What are the possible genotypes of a female child from the union of a woman who is heterozygous for hemophilia and a man who has normal blood clotting characteristics?

Accepted Answer

A)  XHXH or XHXh 
B)  XHXh 
C)  XHYH 
D)  Hh 
E)  HH 
A)  XHXH or XHXh 
B)  XHXh 
C)  XHYH 
D)  Hh 
E)  HH

Question 11

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?

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

Question 12

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 13

When true breeding red tulips are crossed with true breeding white tulips, the progeny have pink flowers. This is an example of:

Accepted Answer

A)  incomplete dominance. 
B)  codominance. 
C)  pleiotropy. 
D)  epistasis. 
E)  norm of reaction. 
A)  incomplete dominance. 
B)  codominance. 
C)  pleiotropy. 
D)  epistasis. 
E)  norm of reaction.

Question 14

A brown-eyed couple heterozygous for eye color are planning on having two children. What is the probability that both children will have blue eyes, assuming brown eyes is dominant and blue eyes is recessive?

Accepted Answer

A)  0 
B)  1/32 
C)  1/16 
D)  1/4 
E)  1/2 
A)  0 
B)  1/32 
C)  1/16 
D)  1/4 
E)  1/2

Question 15

Dominant traits remove recessive traits when both are present in the same individual. 
__________________

Accepted Answer

A) True 
 B)False

Question 16

Pairs of homologous chromosomes are sorted randomly during prophase of meiosis.

Accepted Answer

A) True 
 B)False

Question 17

The mating of totally unrelated homozygous strains of corn produced a new strain of corn that was very different from both parental strains in many characteristics. Provide some explanations for this phenomenon.

Accepted Answer

Concepts to Consider: The offspring stra

Question 18

Genotype can always be inferred from phenotype. 
__________________

Accepted Answer

A) True 
 B)False

Question 19

A particular gene that controls seed coat color in peas also determines the susceptibility of these peas to a particular disease. This situation is referred to as:

Accepted Answer

A)  variegation. 
B)  polygenic inheritance. 
C)  codominance. 
D)  pleiotropy. 
E)  incomplete dominance. 
A)  variegation. 
B)  polygenic inheritance. 
C)  codominance. 
D)  pleiotropy. 
E)  incomplete dominance.

Question 20

Mendel verified true-breeding pea plants for certain traits before undertaking his experiments. The term "true-breeding" refers to:

Accepted Answer

A)  genetically pure lines. 
B)  organisms that have a high rate of reproduction. 
C)  organisms that will produce identical copies of themselves upon reproduction. 
D)  organisms that are heterozygous for a given trait. 
E)  organisms that are homozygous for all possible traits. 
A)  genetically pure lines. 
B)  organisms that have a high rate of reproduction. 
C)  organisms that will produce identical copies of themselves upon reproduction. 
D)  organisms that are heterozygous for a given trait. 
E)  organisms that are homozygous for all possible traits.

Exam 11: The Basic Principles of Heredity

The debate over nature vs. nurture in determining certain human characteristics can be explained by pleiotropic genes .

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

The range of phenotypic possibilities that can develop from a certain dog genotype under different environmental conditions is called the:

Color-blindness is more common in males than in females because:

If a couple is planning on having two children, what is the probability that both will be male?

A heterozygous fruit fly with normal wings and a gray body (VvBb) is crossed with homozygous flies with vestigial wings and black bodies (vvbb). This type of cross is known as a:

In peas, Mendel found that tall plants and yellow peas are dominant. The phenotype for a pea plant with the genotype TTyy would be:

Linked genes are located on ____ chromosomes and do not follow the principle of ____.

In rabbits, coat color is governed by four alleles: C for dark gray, Cch for chinchilla, Ch for himalayan, and c for white. This is an example of:

What are the possible genotypes of a female child from the union of a woman who is heterozygous for hemophilia and a man who has normal blood clotting characteristics?

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?

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

When true breeding red tulips are crossed with true breeding white tulips, the progeny have pink flowers. This is an example of:

A brown-eyed couple heterozygous for eye color are planning on having two children. What is the probability that both children will have blue eyes, assuming brown eyes is dominant and blue eyes is recessive?

Dominant traits remove recessive traits when both are present in the same individual. __________________

Pairs of homologous chromosomes are sorted randomly during prophase of meiosis.

The mating of totally unrelated homozygous strains of corn produced a new strain of corn that was very different from both parental strains in many characteristics. Provide some explanations for this phenomenon.

Genotype can always be inferred from phenotype. __________________

A particular gene that controls seed coat color in peas also determines the susceptibility of these peas to a particular disease. This situation is referred to as:

Mendel verified true-breeding pea plants for certain traits before undertaking his experiments. The term "true-breeding" refers to:

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

Filters

Linked genes are located on chromosomes and do not follow the principle of .

In rabbits, coat color is governed by four alleles: C for dark gray, C^ch for chinchilla, C^h for himalayan, and c for white. This is an example of: