Question 1

Which of the following represents a dihybrid cross?

Accepted Answer

A)  ff x ff 
B)  Gg x gg 
C)  AAbb x Aabb 
D)  AAbb x aaBB 
E)  Ss x ss 
A)  ff x ff 
B)  Gg x gg 
C)  AAbb x Aabb 
D)  AAbb x aaBB 
E)  Ss x ss

Question 2

List the genotypic ratios of the cross between a man with O blood type and a woman with heterozygous B blood type.

Accepted Answer

The man's genotype is ii. The

Question 3

Which of the following represents the genotype of a male who is color-blind?

Accepted Answer

A)  XBXB 
B)  XBXb 
C)  XbXb 
D)  XbY 
E)  XBY 
A)  XBXB 
B)  XBXb 
C)  XbXb 
D)  XbY 
E)  XBY

Question 4

How is familial hypercholesterolemia inherited?

Accepted Answer

A)  autosomal recessive 
B)  autosomal dominant 
C)  incompletely dominant 
D)  codominant 
E)  sex-linked dominant 
A)  autosomal recessive 
B)  autosomal dominant 
C)  incompletely dominant 
D)  codominant 
E)  sex-linked dominant

Question 5

How are Fragile X syndrome and Huntington disease similar?

Accepted Answer

A)  Both exhibit a late onset in life. 
B)  Both are trinucleotide-repeat expansion disorders. 
C)  Both affect the muscles and lead to eventual paralysis. 
D)  Both cause autism. 
E)  Both are found only in males. 
A)  Both exhibit a late onset in life. 
B)  Both are trinucleotide-repeat expansion disorders. 
C)  Both affect the muscles and lead to eventual paralysis. 
D)  Both cause autism. 
E)  Both are found only in males.

Question 6

Which variable has the stronger influence on the color of an individual's skin?

Accepted Answer

A)  the individual's phenotype 
B)  the amount of time spent in the sun 
C)  the amount of time spent in the sun and the individual's genotype 
D)  the individual's genotype 
E)  Neither the sun nor the individual's genotype have any influence on the individual's skin color. Skin color is due to a combination of an individual's genotype as well as the environmental influence. 
A)  the individual's phenotype 
B)  the amount of time spent in the sun 
C)  the amount of time spent in the sun and the individual's genotype 
D)  the individual's genotype 
E)  Neither the sun nor the individual's genotype have any influence on the individual's skin color. Skin color is due to a combination of an individual's genotype as well as the environmental influence.

Question 7

When you describe a person as having attached ear lobes, you are describing his or her genotype.

Accepted Answer

A) True 
 B)False

Question 8

Which of the following disorders is caused by a defect in the production of an elastic connective tissue protein called fibrillin?

Accepted Answer

A)  cystic fibrosis 
B)  Tay-Sachs disease 
C)  Marfan syndrome 
D)  Huntington disease 
E)  sickle-cell disease 
A)  cystic fibrosis 
B)  Tay-Sachs disease 
C)  Marfan syndrome 
D)  Huntington disease 
E)  sickle-cell disease

Question 9

Which of the following is a dominant allele?

Accepted Answer

A)  A 
B)  a 
C)  AA 
D)  ab 
E)  Ab 
A)  A 
B)  a 
C)  AA 
D)  ab 
E)  Ab

Question 10

Of the three possible alleles for the ABO blood type, each individual can have how many?

Accepted Answer

A)  one 
B)  two 
C)  three 
D)  none 
E)  half an allele 
A)  one 
B)  two 
C)  three 
D)  none 
E)  half an allele

Question 11

Can a woman with an X-linked recessive disorder have normal sons?

Accepted Answer

The answer of Can a woman with an X-linked recessive...

Question 12

Which of the following is not a characteristic of an X-linked recessive disorder pedigree?

Accepted Answer

A)  An affected son can have normal parents. 
B)  If a female has the trait, her father must also have it. 
C)  The characteristic often skips a generation. 
D)  More females than males are affected. 
E)  If a woman has the characteristic, all of her sons will have it. 
A)  An affected son can have normal parents. 
B)  If a female has the trait, her father must also have it. 
C)  The characteristic often skips a generation. 
D)  More females than males are affected. 
E)  If a woman has the characteristic, all of her sons will have it.

Question 13

Which of the following disorders is a trinucleotide repeat disorder?

Accepted Answer

A)  Marfan syndrome 
B)  sickle-cell disease 
C)  cystic fibrosis 
D)  Tay-Sachs disease 
E)  Huntington disease 
A)  Marfan syndrome 
B)  sickle-cell disease 
C)  cystic fibrosis 
D)  Tay-Sachs disease 
E)  Huntington disease

Question 14

Julie has a genetic disorder. Julie and her husband, Shane, have three children, none of which have the genetic disorder. How is this disorder most likely inherited?

Accepted Answer

A)  autosomal dominant 
B)  autosomal recessive 
C)  heterozygous dominant 
D)  The environment influences the trait instead of the genetics. 
E)  100% inheritance from the father since the children are not affected. 
A)  autosomal dominant 
B)  autosomal recessive 
C)  heterozygous dominant 
D)  The environment influences the trait instead of the genetics. 
E)  100% inheritance from the father since the children are not affected.

Question 15

Which of the following would not be a common/conventional way to list someone's genotype?

Accepted Answer

A)  BB 
B)  Bb 
C)  AB 
D)  bb 
E)  AA 
A)  BB 
B)  Bb 
C)  AB 
D)  bb 
E)  AA

Question 16

Which of the following individuals has a recessive phenotype?

Accepted Answer

A)  AA 
B)  Aa 
C)  AaBb 
D)  aabb 
E)  aAbB 
A)  AA 
B)  Aa 
C)  AaBb 
D)  aabb 
E)  aAbB

Question 17

In a cross of a homozygous dominant parent and a homozygous recessive parent, what is the ratio of offspring that will exhibit the recessive phenotype?

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 18

Most of the sex-linked traits are found only on the X chromosome.

Accepted Answer

A) True 
 B)False

Question 19

Which of the following traits is an X-linked recessive disorder?

Accepted Answer

A)  color blindness 
B)  Tay-Sachs 
C)  cystic fibrosis 
D)  sickle-cell disease 
E)  Marfan syndrome 
A)  color blindness 
B)  Tay-Sachs 
C)  cystic fibrosis 
D)  sickle-cell disease 
E)  Marfan syndrome

Question 20

Which of the following X-linked recessive disorders is characterized by a degeneration of the muscles?

Accepted Answer

A)  Fragile X 
B)  Duchenne 
C)  color blindness 
D)  hemophilia 
E)  malaria 
A)  Fragile X 
B)  Duchenne 
C)  color blindness 
D)  hemophilia 
E)  malaria

Exam 21: Patterns of Genetic Inheritance

Which of the following represents a dihybrid cross?

List the genotypic ratios of the cross between a man with O blood type and a woman with heterozygous B blood type.

Which of the following represents the genotype of a male who is color-blind?

How is familial hypercholesterolemia inherited?

How are Fragile X syndrome and Huntington disease similar?

Which variable has the stronger influence on the color of an individual's skin?

When you describe a person as having attached ear lobes, you are describing his or her genotype.

Which of the following disorders is caused by a defect in the production of an elastic connective tissue protein called fibrillin?

Which of the following is a dominant allele?

Of the three possible alleles for the ABO blood type, each individual can have how many?

Can a woman with an X-linked recessive disorder have normal sons?

Which of the following is not a characteristic of an X-linked recessive disorder pedigree?

Which of the following disorders is a trinucleotide repeat disorder?

Julie has a genetic disorder. Julie and her husband, Shane, have three children, none of which have the genetic disorder. How is this disorder most likely inherited?

Which of the following would not be a common/conventional way to list someone's genotype?

Which of the following individuals has a recessive phenotype?

In a cross of a homozygous dominant parent and a homozygous recessive parent, what is the ratio of offspring that will exhibit the recessive phenotype?

Most of the sex-linked traits are found only on the X chromosome.

Which of the following traits is an X-linked recessive disorder?

Which of the following X-linked recessive disorders is characterized by a degeneration of the muscles?

Human Organization

Chemistery of Life

Cell Structure and Function

Torganization and Regulation of Body Systems

Cardiovascular System : Heart and Blood Vessels

Cardiovascular System : Blood

The Lumphatic and Immune Systems

Biology of Infectious Diseases

Digestive System and Nutrition

Respiratory System

Urinary System

Skeletal System

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Nervous System

Senses

Endocring System

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Development and Aging

Patterns of Chromosome Inheritance

Cancer

Dna Piology and Technology

Hummen Evolution

Ecology and the Nature of Ecosystems

Hummen Interactions With the Biosphere

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