Question 1

Mendel's hypotheses regarding inheritance in peas were generally accepted when he published them in 1865.

Accepted Answer

A) True 
 B)False

Question 2

Many genes contain instructions for building

Accepted Answer

A)  carbohydrates. 
B)  steroids. 
C)  proteins. 
D)  lipids. 
A)  carbohydrates. 
B)  steroids. 
C)  proteins. 
D)  lipids.

Question 3

The following figure shows three generations in one of Mendel's experiments.According to the data in this figure,Mendel's F2 generation contains many more purple flowers than white flowers.Which of the following is the best explanation of this observation?

Accepted Answer

A)  Three-quarters of the offspring must receive the white allele. 
B)  The chance of an individual offspring receiving a white allele is only 25 percent. 
C)  The probability of any individual offspring receiving at least one copy of the purple allele is 75 percent. 
D)  The white allele is only dominant in about 25 percent of the offspring that inherit it. 
A)  Three-quarters of the offspring must receive the white allele. 
B)  The chance of an individual offspring receiving a white allele is only 25 percent. 
C)  The probability of any individual offspring receiving at least one copy of the purple allele is 75 percent. 
D)  The white allele is only dominant in about 25 percent of the offspring that inherit it.

Question 4

If a person has one copy of each of two different alleles for a given gene,the person is ________ for that trait.

Accepted Answer

A)  heterozygous 
B)  homozygous 
C)  recessive 
D)  true-breeding 
A)  heterozygous 
B)  homozygous 
C)  recessive 
D)  true-breeding

Question 5

In a genetic cross of Gg with Gg guinea pigs,none of the four offspring were gg.This outcome

Accepted Answer

A)  disproves Mendel's law of independent assortment. 
B)  neither supports nor disproves Mendel's law of independent assortment. 
C)  supports Mendel's law of independent assortment. 
D)  supports Mendel's law of segregation. 
A)  disproves Mendel's law of independent assortment. 
B)  neither supports nor disproves Mendel's law of independent assortment. 
C)  supports Mendel's law of independent assortment. 
D)  supports Mendel's law of segregation.

Question 6

Humans have many genes that contribute to the unique array of proteins found on their red blood cells.Your MN blood type (the letters indicate the presence of M and N proteins on the red blood cells)is determined by the codominant alleles LM and LN.Which of the following genotypes could NOT be produced when a man with MN blood and a woman with MN blood mate?

Accepted Answer

A)  LMLM 
B)  LMLN 
C)  LNLN 
D)  LMNLM 
A)  LMLM 
B)  LMLN 
C)  LNLN 
D)  LMNLM

Question 7

An individual with the genotype Aa mates with an individual with the genotype AA.Which of the following is true?

Accepted Answer

A)  These two individuals will have four offspring. 
B)  Half of the offspring will be Aa. 
C)  Twenty-five percent of the offspring will be aa. 
D)  Seventy-five percent of the offspring will be AA. 
A)  These two individuals will have four offspring. 
B)  Half of the offspring will be Aa. 
C)  Twenty-five percent of the offspring will be aa. 
D)  Seventy-five percent of the offspring will be AA.

Question 8

Which of the following statements is true?

Accepted Answer

A)  Specific mutations occur because they are needed. 
B)  Mutations only occur during development. 
C)  All mutations are harmful. 
D)  Gametes fuse without regard to which mutations they carry. 
A)  Specific mutations occur because they are needed. 
B)  Mutations only occur during development. 
C)  All mutations are harmful. 
D)  Gametes fuse without regard to which mutations they carry.

Question 9

Alternate versions of the same gene,such as blue or brown for eye color,are known as ________.

Accepted Answer

The answer of Alternate versions of the same gene,such as...

Question 10

When a ________ variety of a plant is self-fertilized,all of its offspring have the same phenotype as the parent.

Accepted Answer

true-breed

Question 11

One of the first medical tests a newborn receives determines if the child has phenylketonuria (PKU).PKU is the result of a mutation in a single gene that causes mental retardation and a host of other phenotypes (light hair and skin color,eczema,and a "mousy" smell).By detecting PKU early,doctors are able to reduce the effect of this condition with a modified diet.PKU is an example of

Accepted Answer

A)  epistasis. 
B)  a polygenic trait. 
C)  pleiotropy. 
D)  codominance. 
A)  epistasis. 
B)  a polygenic trait. 
C)  pleiotropy. 
D)  codominance.

Question 12

Most traits are under the control of more than one gene.

Accepted Answer

A) True 
 B)False

Question 13

Which of the following choices represents the genotype of an individual diploid organism?

Accepted Answer

A)  BbCCdd 
B)  BCd 
C)  bCd 
D)  BbCd 
A)  BbCCdd 
B)  BCd 
C)  bCd 
D)  BbCd

Question 14

A genetic cross is used to produce organisms from species that would not normally interbreed.

Accepted Answer

A) True 
 B)False

Question 15

Feather color in a certain species of bird is controlled by a pair of alleles that exhibit incomplete dominance.If birds that are homozygous for one allele are black and birds that are homozygous for the other allele are white,then heterozygous birds would be

Accepted Answer

A)  black. 
B)  white. 
C)  gray. 
D)  black with white stripes. 
A)  black. 
B)  white. 
C)  gray. 
D)  black with white stripes.

Question 16

Which of the following represents all of the possible gametes that can be formed by an individual with the genetic makeup Ff GgHH ?

Accepted Answer

A)  FGH,FgH,fGH,fgH 
B)  Ff,Gg,HH 
C)  FG,FH,Fg,fH,fG,fg,GH,gH 
D)  Ff GhHH,FFGGHH,f fgghh 
A)  FGH,FgH,fGH,fgH 
B)  Ff,Gg,HH 
C)  FG,FH,Fg,fH,fG,fg,GH,gH 
D)  Ff GhHH,FFGGHH,f fgghh

Question 17

The black arrow in the following image indicates one of the structures within a cell's nucleus that carries hereditary information.These structures contain segments that commonly encode the instructions for building proteins;one of these segments is called a(n)

Accepted Answer

A)  genotype. 
B)  phenotype. 
C)  chromosome. 
D)  gene. 
A)  genotype. 
B)  phenotype. 
C)  chromosome. 
D)  gene.

Question 18

Humans exhibit a variety of physical,biochemical,and behavioral characteristics that are based on their DNA sequences.

Accepted Answer

A) True 
 B)False

Question 19

Which of the following statements is a basic summary of one of Mendel's laws?

Accepted Answer

A)  All beneficial human genetic traits are dominant,and harmful traits are recessive. 
B)  The pattern of inherited characteristics of organisms is not predictable. 
C)  The separation of alleles for one gene does not affect the separation of alleles for other genes. 
D)  Recessive alleles cause the death of the gamete. 
A)  All beneficial human genetic traits are dominant,and harmful traits are recessive. 
B)  The pattern of inherited characteristics of organisms is not predictable. 
C)  The separation of alleles for one gene does not affect the separation of alleles for other genes. 
D)  Recessive alleles cause the death of the gamete.

Question 20

Which of the following statements is NOT true?

Accepted Answer

A)  Two organisms with the same genotype are homozygous. 
B)  Two organisms with the same phenotype may have different genotypes. 
C)  A heterozygous organism may have the same phenotype as a homozygous organism. 
D)  A heterozygous organism has the same number of copies of a given gene as a homozygous organism. 
A)  Two organisms with the same genotype are homozygous. 
B)  Two organisms with the same phenotype may have different genotypes. 
C)  A heterozygous organism may have the same phenotype as a homozygous organism. 
D)  A heterozygous organism has the same number of copies of a given gene as a homozygous organism.

Exam 9: Patterns of Inheritance

Mendel's hypotheses regarding inheritance in peas were generally accepted when he published them in 1865.

Many genes contain instructions for building

The following figure shows three generations in one of Mendel's experiments.According to the data in this figure,Mendel's F2 generation contains many more purple flowers than white flowers.Which of the following is the best explanation of this observation?

If a person has one copy of each of two different alleles for a given gene,the person is ________ for that trait.

In a genetic cross of Gg with Gg guinea pigs,none of the four offspring were gg.This outcome

An individual with the genotype Aa mates with an individual with the genotype AA.Which of the following is true?

Which of the following statements is true?

Alternate versions of the same gene,such as blue or brown for eye color,are known as ________.

When a ________ variety of a plant is self-fertilized,all of its offspring have the same phenotype as the parent.

Most traits are under the control of more than one gene.

Which of the following choices represents the genotype of an individual diploid organism?

A genetic cross is used to produce organisms from species that would not normally interbreed.

Feather color in a certain species of bird is controlled by a pair of alleles that exhibit incomplete dominance.If birds that are homozygous for one allele are black and birds that are homozygous for the other allele are white,then heterozygous birds would be

Which of the following represents all of the possible gametes that can be formed by an individual with the genetic makeup Ff GgHH ?

The black arrow in the following image indicates one of the structures within a cell's nucleus that carries hereditary information.These structures contain segments that commonly encode the instructions for building proteins;one of these segments is called a(n)

Humans exhibit a variety of physical,biochemical,and behavioral characteristics that are based on their DNA sequences.

Which of the following statements is a basic summary of one of Mendel's laws?

Which of the following statements is NOT true?

The Nature of Science and the Characteristics of Life

The Chemistry of Life

Cell Structure and Internal Compartments

Cell Membranes, Transport, and Communication

Energy, Metabolism, and Enzymes

Photosynthesis and Cellular Respiration

Cell Division

Cancer and Human Health

Chromosomes and Human Genetics

DNA and Genes

From Gene to Protein

DNA Technology

How Evolution Works

The Origin of Species

The Evolution of Biodiversity

Biological Diversity, Bacteria, and Archaea

Protista, Plantae, and Fungi

Animalia

The Biosphere

Growth of Populations

Animal Behavior

Ecological Communities

Ecosystems

Global Change

Internal Organization and Homeostasis

Nutrition and Digestion

Circulation and Gas Exchange

Animal Hormones

Nervous and Sensory Systems

Skeletons,Muscles,and Movement

The Immune System

Reproduction and Development

Plant Structure, Nutrition, and Transport

Plant Growth and Reproduction

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The following figure shows three generations in one of Mendel's experiments.According to the data in this figure,Mendel's F₂ generation contains many more purple flowers than white flowers.Which of the following is the best explanation of this observation?