Question 1

The individual with genotype AaBbCCDdEE can make many kinds of gametes.Which of the following is the major reason?

Accepted Answer

A) segregation of maternal and paternal alleles 
B) recurrent mutations forming new alleles 
C) crossing over during prophase I 
D) different possible alignments of chromosomes 
E) the tendency for dominant alleles to segregate together 
A) segregation of maternal and paternal alleles 
B) recurrent mutations forming new alleles 
C) crossing over during prophase I 
D) different possible alignments of chromosomes 
E) the tendency for dominant alleles to segregate together

Question 2

Mendel was able to draw his ideas of segregation and independent assortment because of the influence of which of the following?

Accepted Answer

A) his reading and discussion of Darwin's Origin of Species 
B) the understanding of particulate inheritance he learned from renowned scientists of his time 
C) his discussions of heredity with his colleagues at major universities 
D) his experiments with the breeding of plants such as peas and fuchsia 
E) his reading of the scientific literature current in the field 
A) his reading and discussion of Darwin's Origin of Species 
B) the understanding of particulate inheritance he learned from renowned scientists of his time 
C) his discussions of heredity with his colleagues at major universities 
D) his experiments with the breeding of plants such as peas and fuchsia 
E) his reading of the scientific literature current in the field

Question 3

Use the following information to answer the questions below.
A certain (hypothetical)organism is diploid,has either blue or orange wings as the consequence of one of its genes on chromosome 12,and has either long or short antennae as the result of a second gene on chromosome 19,as shown in this figure.
  
-A female with a paternal set of one orange and one long gene chromosome and a maternal set comprised of one blue and one short gene chromosome is expected to produce which of the following types of eggs after meiosis?

Accepted Answer

A) All eggs will have maternal types of gene combinations. 
B) All eggs will have paternal types of gene combinations. 
C) Half the eggs will have maternal and half will have paternal combinations. 
D) Each egg has a one-fourth chance of having either blue long, blue short, orange long, or orange short combinations. 
E) Each egg has a three-fourths chance of having blue long, one-fourth blue short, three-fourths orange long, or one-fourth orange short combinations. 
A) All eggs will have maternal types of gene combinations. 
B) All eggs will have paternal types of gene combinations. 
C) Half the eggs will have maternal and half will have paternal combinations. 
D) Each egg has a one-fourth chance of having either blue long, blue short, orange long, or orange short combinations. 
E) Each egg has a three-fourths chance of having blue long, one-fourth blue short, three-fourths orange long, or one-fourth orange short combinations.

Question 4

In rabbits,the homozygous CC is normal,Cc results in deformed legs,and cc results in very short legs.The genotype BB produces black fur,Bb brown fur,and bb white fur.If a cross is made between brown rabbits with deformed legs and white rabbits with deformed legs,what percentage of the offspring would be expected to have deformed legs and white fur?

Accepted Answer

A) 0% 
B) 25% 
C) 33% 
D) 50% 
E) 100% 
A) 0% 
B) 25% 
C) 33% 
D) 50% 
E) 100%

Question 5

An individual that has two different alleles for the same trait is said to be

Accepted Answer

A) homozygotic. 
B) heterozygotic. 
C) recessive. 
D) polygenic. 
E) pleiotropic. 
A) homozygotic. 
B) heterozygotic. 
C) recessive. 
D) polygenic. 
E) pleiotropic.

Question 6

In certain plants,tall is dominant to short.If a heterozygous plant is crossed with a homozygous tall plant,what is the probability that the offspring will be short?

Accepted Answer

A) 1 
B) 1/2 
C) 1/4 
D) 1/6 
E) 0 
A) 1 
B) 1/2 
C) 1/4 
D) 1/6 
E) 0

Question 7

Use the following information to answer the questions below.
Labrador retrievers are black,brown,or yellow.In a cross of a black female with a brown male,results can be either all black puppies,1/2 black to 1/2 brown puppies,or 3/4 black to 1/4 yellow puppies.
-How many genes must be responsible for these coat colours in Labrador retrievers?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
E) 5 
A) 1 
B) 2 
C) 3 
D) 4 
E) 5

Question 8

A sexually reproducing animal has two unlinked genes,one for head shape (H)and one for tail length (T).Its genotype is HhTt.Which of the following genotypes is possible in a gamete from this organism?

Accepted Answer

A) tt 
B) Hh 
C) HhTt 
D) T 
E) HT 
A) tt 
B) Hh 
C) HhTt 
D) T 
E) HT

Question 9

Use the following description and figure to answer the questions below.
In a particular plant,leaf colour is controlled by gene locus D.Plants with at least one allele D have dark green leaves,and plants with the homozygous recessive dd genotype have light green leaves.A true-breeding dark-leaved plant is crossed with a light-leaved one,and the F₁ offspring is allowed to self-pollinate.The predicted outcome of the F₂ is diagrammed in the Punnett square shown below,where 1,2,3,and 4 represent the genotypes corresponding to each box within the square.
  
-Which of the plants will be true-breeding?

Accepted Answer

A) 1 and 4 only 
B) 2 and 3 only 
C) 1, 2, 3, and 4 
D) 1 only 
E) 1 and 2 only 
A) 1 and 4 only 
B) 2 and 3 only 
C) 1, 2, 3, and 4 
D) 1 only 
E) 1 and 2 only

Question 10

Given the parents AABBCc × AabbCc,assume simple dominance for each trait and independent assortment.What proportion of the progeny will be expected to phenotypically resemble the first parent?

Accepted Answer

A) 1/4 
B) 1/8 
C) 3/4 
D) 3/8 
E) 1 
A) 1/4 
B) 1/8 
C) 3/4 
D) 3/8 
E) 1

Question 11

Use the following description and figure to answer the questions below.
In a particular plant,leaf colour is controlled by gene locus D.Plants with at least one allele D have dark green leaves,and plants with the homozygous recessive dd genotype have light green leaves.A true-breeding dark-leaved plant is crossed with a light-leaved one,and the F₁ offspring is allowed to self-pollinate.The predicted outcome of the F₂ is diagrammed in the Punnett square shown below,where 1,2,3,and 4 represent the genotypes corresponding to each box within the square.
  
-Which of the boxes correspond to plants with a heterozygous genotype?

Accepted Answer

A) 1 
B) 1 and 2 
C) 1, 2, and 3 
D) 2 and 3 
E) 2, 3, and 4 
A) 1 
B) 1 and 2 
C) 1, 2, and 3 
D) 2 and 3 
E) 2, 3, and 4

Question 12

________ is when a gene on one locus has an influence on the phenotypic expression of an allele at another locus.

Accepted Answer

A) Polygenic influence 
B) Pleiotropy 
C) Multifactorial occurrence 
D) Epistasis 
E) Segregation 
A) Polygenic influence 
B) Pleiotropy 
C) Multifactorial occurrence 
D) Epistasis 
E) Segregation

Exam 14: Mendel and the Gene Idea

The individual with genotype AaBbCCDdEE can make many kinds of gametes.Which of the following is the major reason?

Mendel was able to draw his ideas of segregation and independent assortment because of the influence of which of the following?

An individual that has two different alleles for the same trait is said to be

In certain plants,tall is dominant to short.If a heterozygous plant is crossed with a homozygous tall plant,what is the probability that the offspring will be short?

A sexually reproducing animal has two unlinked genes,one for head shape (H)and one for tail length (T).Its genotype is HhTt.Which of the following genotypes is possible in a gamete from this organism?

Given the parents AABBCc × AabbCc,assume simple dominance for each trait and independent assortment.What proportion of the progeny will be expected to phenotypically resemble the first parent?

________ is when a gene on one locus has an influence on the phenotypic expression of an allele at another locus.

Introduction: Evolution and Themes of Biology

The Chemical Context of Life

Water and Life

Carbon and the Molecular Diversity of Life

The Structure and Function of Large Biological Molecules

A Tour of the Cell

Membrane Structure and Function

An Introduction to Metabolism

Cellular Respiration and Fermentation

Photosynthesis

Cell Communication

The Cell Cycle

Meiosis and Sexual Life Cycles

The Chromosomal Basis of Inheritance

The Molecular Basis of Inheritance

From Gene to Protein

Regulation of Gene Expression

Viruses

DNA Tools and Biotechnology

Genomes and Their Evolution

Descent with Modification: A Darwinian View of Life

The Evolution of Populations

The Origin of Species

The History of Life on Earth

Phylogeny and the Tree of Life

Bacteria and Archaea

Protists

Plant Diversity I: How Plants Colonized Land

Plant Diversity II: The Evolution of Seed Plants

Fungi

An Overview of Animal Diversity

An Introduction to Invertebrates

The Origin and Evolution of Vertebrates

Plant Structure,Growth,and Development

Resource Acquisition and Transport in Vascular Plants

Soil and Plant Nutrition

Angiosperm Reproduction and Biotechnology

Plant Responses to Internal and External Signals

Basic Principles of Animal Form and Function

Animal Nutrition

Circulation and Gas Exchange

The Immune System

Osmoregulation and Excretion

Hormones and the Endocrine System

Animal Reproduction

Animal Development

Neurons,Synapses,and Signalling

Nervous Systems

Sensory and Motor Mechanisms

Animal Behaviour

An Introduction to Ecology and the Biosphere

Population Ecology

Community Ecology

Ecosystems and Restoration Ecology

Conservation Biology and Global Change

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