Question 1

In cystic fibrosis patients,

Accepted Answer

A)  chlorine ions are stuck inside epithelial cells. 
B)  water is excessively abundant on surfaces of epithelia. 
C)  surfaces of epithelia are relatively dry. 
D)  chlorine ions are stuck inside epithelial cells, and water is excessively abundant on surfaces of epithelia. 
E)  chlorine ions are stuck inside epithelial cells, and surfaces of epithelia are relatively dry. 
A)  chlorine ions are stuck inside epithelial cells. 
B)  water is excessively abundant on surfaces of epithelia. 
C)  surfaces of epithelia are relatively dry. 
D)  chlorine ions are stuck inside epithelial cells, and water is excessively abundant on surfaces of epithelia. 
E)  chlorine ions are stuck inside epithelial cells, and surfaces of epithelia are relatively dry.

Question 2

A bell-shaped curve of phenotypic variation is indicative of

Accepted Answer

A)  environmental effects on phenotypes. 
B)  incomplete dominance. 
C)  multiple alleles. 
D)  epistasis. 
E)  more than one of these. 
A)  environmental effects on phenotypes. 
B)  incomplete dominance. 
C)  multiple alleles. 
D)  epistasis. 
E)  more than one of these.

Question 3

Albinism is a recessive disorder. Rapinder is an albino and his partner, Janeen has normal pigmented skin. Her father was also an albino. Janeen is pregnant and Rapinder is the father. What is the probability that they will have normal pigmented child?

Accepted Answer

A)  0% 
B)  25% 
C)  50% 
D)  75% 
E)  100% 
A)  0% 
B)  25% 
C)  50% 
D)  75% 
E)  100%

Question 4

In humans, hair texture is an incompletly dominant trait. Curly hair is the homozygous dominant trait; smooth hair is homozgous recessive; wavy hair is heterozygous. If two wavy haired individuals have children what is the expected phenotype ratio?

Accepted Answer

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

Question 5

Which of the following would be the LEAST satisfactory organism for genetic research?

Accepted Answer

A)  humans 
B)  bacteria 
C)  mice 
D)  fruit flies 
E)  pea plants 
A)  humans 
B)  bacteria 
C)  mice 
D)  fruit flies 
E)  pea plants

Question 6

Purple flower ( A ) is dominant over white flower ( a ), and tall stem ( B ) is dominant over short stem ( b ). The Punnett square represents a cross between two dihybrids ( AaBb ´ AaBb ). Examine the figure above, and answer the following question(s). In the figure above, what is the ratio of phenotypes in this case?

Accepted Answer

A)  1: 1:1:1 
B)  3:1 
C)  6:3:3:1 
D)  9:3:3:1 
E)  15:1 
A)  1: 1:1:1 
B)  3:1 
C)  6:3:3:1 
D)  9:3:3:1 
E)  15:1

Question 7

In Duchenne muscular dystrophy, which protein is directly affected?

Accepted Answer

A)  myosin 
B)  actin 
C)  dystrophin 
D)  myoglobin 
E)  hemoglobin 
A)  myosin 
B)  actin 
C)  dystrophin 
D)  myoglobin 
E)  hemoglobin

Question 8

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 homologous 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 answer c. 
A)  they are located close together on the same chromosome. 
B)  they are located on homologous 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 answer c.

Question 9

A(n) ____ is an offspring of a cross between two individuals that breed true for different forms of a trait.

Accepted Answer

A)  homozygote 
B)  recessive 
C)  hybrid 
D)  phenotype 
E)  genotype 
A)  homozygote 
B)  recessive 
C)  hybrid 
D)  phenotype 
E)  genotype

Question 10

When two alleles of the same gene are identical, the individual carrying those alleles is said to be

Accepted Answer

A)  dominant. 
B)  heterozygous. 
C)  recessive. 
D)  genotypical. 
E)  homozygous. 
A)  dominant. 
B)  heterozygous. 
C)  recessive. 
D)  genotypical. 
E)  homozygous.

Question 11

Ella is a normal XX girl who is red-green colorblind. She is pregnant and the father is Terrick who has normal color vision. What is the probability that - if they have a daughter - the daughter will be red-green colorblind?

Accepted Answer

A)  0% 
B)  25% 
C)  50% 
D)  100% 
E)  impossible to tell with the information provided 
A)  0% 
B)  25% 
C)  50% 
D)  100% 
E)  impossible to tell with the information provided

Question 12

Regarding infection, what is the problem with cystic fibrosis?

Accepted Answer

A)  bacteria are not captured properly to signal an immune response 
B)  white blood cells are mutated and do not recognize foreign bacteria 
C)  the mutated cystic fibrosis protein is not recognized by the immune system 
D)  because multiple copies of the mutated protein are made, the immune system goes into hyperdrive 
E)  more than one of these problems occurs 
A)  bacteria are not captured properly to signal an immune response 
B)  white blood cells are mutated and do not recognize foreign bacteria 
C)  the mutated cystic fibrosis protein is not recognized by the immune system 
D)  because multiple copies of the mutated protein are made, the immune system goes into hyperdrive 
E)  more than one of these problems occurs

Question 13

Achondroplasia Achondroplasia is an autosomal dominant disorder, however homozygous dominant individuals do not have achondroplasia - they either die before birth or very shortly thereafter. The homozygous recessive condition is normal. A dwarf couple decide to have children. Use this information to answer the following question(s). In the example above, what is the probability that this couple will have a normal child?

Accepted Answer

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

Question 14

The process by which chromosomes fail to separate during meiosis is called

Accepted Answer

A)  aneuploidy. 
B)  trisomy. 
C)  monosomy. 
D)  nondisjunction. 
E)  polyploidy. 
A)  aneuploidy. 
B)  trisomy. 
C)  monosomy. 
D)  nondisjunction. 
E)  polyploidy.

Question 15

If a 1n egg is fertilized by a n-l sperm, the resulting zygote will have

Accepted Answer

A)  the chromosome number 2n - 1 . 
B)  a chromosome without its homologue. 
C)  a condition called monosomy. 
D)  a genetic disorder. 
E)  all of these conditions. 
A)  the chromosome number 2n - 1 . 
B)  a chromosome without its homologue. 
C)  a condition called monosomy. 
D)  a genetic disorder. 
E)  all of these conditions.

Question 16

What does the normal protein that is encoded by the "cystic fibrosis" gene do?

Accepted Answer

A)  transports chloride ions across membranes 
B)  delivers chloride ions to the endoplasmic reticulum 
C)  binds chloride ions to DNA prior to gene expression 
D)  binds chloride ions to bacteria so they are more easily recognized by white blood cells 
E)  the normal protein does more than one of these things 
A)  transports chloride ions across membranes 
B)  delivers chloride ions to the endoplasmic reticulum 
C)  binds chloride ions to DNA prior to gene expression 
D)  binds chloride ions to bacteria so they are more easily recognized by white blood cells 
E)  the normal protein does more than one of these things

Question 17

Selecting the Exception Four of the five answers listed below are caused by recessive genes. Select the EXCEPTION.

Accepted Answer

A)  achondroplasia. 
B)  phenylketonuria. 
C)  Tay-Sachs. 
D)  hemophilia 
E)  Duchenne muscular dystrophy 
A)  achondroplasia. 
B)  phenylketonuria. 
C)  Tay-Sachs. 
D)  hemophilia 
E)  Duchenne muscular dystrophy

Question 18

If all offspring of a cross have the same heterozygous genotype, the parents of the cross would most likely be

Accepted Answer

A)  homozygous dominant and homozygous recessive. 
B)  both heterozygous. 
C)  heterozygous and homozygous recessive. 
D)  homozygous dominant and heterozygous. 
E)  both homozygous dominant. 
A)  homozygous dominant and homozygous recessive. 
B)  both heterozygous. 
C)  heterozygous and homozygous recessive. 
D)  homozygous dominant and heterozygous. 
E)  both homozygous dominant.

Question 19

The mutation that resulted in the lighter skin color of people of European descent occurred between ____  and ____ years ago.

Accepted Answer

A)  100...600 
B)  1000...6000 
C)  6000...10,000 
D)  100, 000...600,000 
E)  600,00... 1,000,000 
A)  100...600 
B)  1000...6000 
C)  6000...10,000 
D)  100, 000...600,000 
E)  600,00... 1,000,000

Question 20

Purple flower ( A ) is dominant over white flower ( a ), and tall stem ( B ) is dominant over short stem ( b ). The Punnett square represents a cross between two dihybrids ( AaBb ´ AaBb ). Examine the figure above, and answer the following question(s). In the figure above, what would be the genotype of plant #7?

Accepted Answer

A)  AaBb 
B)  AABb 
C)  AaBB 
D)  AABB 
E)  aaBB 
A)  AaBb 
B)  AABb 
C)  AaBB 
D)  AABB 
E)  aaBB

Exam 9: Patterns of Inheritance

In cystic fibrosis patients,

A bell-shaped curve of phenotypic variation is indicative of

Albinism is a recessive disorder. Rapinder is an albino and his partner, Janeen has normal pigmented skin. Her father was also an albino. Janeen is pregnant and Rapinder is the father. What is the probability that they will have normal pigmented child?

In humans, hair texture is an incompletly dominant trait. Curly hair is the homozygous dominant trait; smooth hair is homozgous recessive; wavy hair is heterozygous. If two wavy haired individuals have children what is the expected phenotype ratio?

Which of the following would be the LEAST satisfactory organism for genetic research?

In Duchenne muscular dystrophy, which protein is directly affected?

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

A(n) ____ is an offspring of a cross between two individuals that breed true for different forms of a trait.

When two alleles of the same gene are identical, the individual carrying those alleles is said to be

Ella is a normal XX girl who is red-green colorblind. She is pregnant and the father is Terrick who has normal color vision. What is the probability that - if they have a daughter - the daughter will be red-green colorblind?

Regarding infection, what is the problem with cystic fibrosis?

The process by which chromosomes fail to separate during meiosis is called

If a 1n egg is fertilized by a n-l sperm, the resulting zygote will have

What does the normal protein that is encoded by the "cystic fibrosis" gene do?

Selecting the Exception Four of the five answers listed below are caused by recessive genes. Select the EXCEPTION.

If all offspring of a cross have the same heterozygous genotype, the parents of the cross would most likely be

The mutation that resulted in the lighter skin color of people of European descent occurred between ____ and ____ years ago.

Invitation to Biology

Molecules of Life

Cell Structure

Energy and Metabolism

Capturing and Releasing Energy

Dna Structure and Function

Gene Expression and Control

How Cells Reproduce

Biotechnology

Evidence of Evolution

Processes of Evolution

Early Life Forms and the Viruses

Plants and Fungi

Animal Evolution

Population Ecology

Communities and Ecosystems

The Biosphere and Human Effects

Animal Tissues and Organs

How Animals Move

Circulation and Respiration

Immunity

Digestion and Excretion

Neural Control and the Senses

Endocrine Control

Reproduction and Development

Plant Form and Function

Plant Reproduction and Development

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The mutation that resulted in the lighter skin color of people of European descent occurred between and years ago.